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Gentoo Linux Security Advisory 202402-07

Gentoo Linux Security Advisory 202402-7 - Multiple vulnerabilities have been found in Xen, the worst of which can lead to arbitrary code execution. Versions greater than or equal to 4.16.6_pre1 are affected.

Packet Storm
#vulnerability#web#mac#linux
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Gentoo Linux Security Advisory                           GLSA 202402-07- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -                                           https://security.gentoo.org/- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: High    Title: Xen: Multiple Vulnerabilities     Date: February 04, 2024     Bugs: #754105, #757126, #826998, #837575, #858122, #876790, #879031, #903624, #905389, #915970       ID: 202402-07- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -Synopsis========Multiple vulnerabilities have been found in Xen, the worst of which canlead to arbitrary code execution.Background==========Xen is a bare-metal hypervisor.Affected packages=================Package            Vulnerable     Unaffected-----------------  -------------  --------------app-emulation/xen  < 4.16.6_pre1  >= 4.16.6_pre1Description===========Multiple vulnerabilities have been discovered in Xen. Please review theCVE identifiers referenced below for details.Impact======Please review the referenced CVE identifiers for details.Workaround==========There is no known workaround at this time.Resolution==========All Xen users should upgrade to the latest version:  # emerge --sync  # emerge --ask --oneshot --verbose ">=app-emulation/xen-4.16.6_pre1"References==========[ 1 ] CVE-2021-28703      https://nvd.nist.gov/vuln/detail/CVE-2021-28703[ 2 ] CVE-2021-28704      https://nvd.nist.gov/vuln/detail/CVE-2021-28704[ 3 ] CVE-2021-28705      https://nvd.nist.gov/vuln/detail/CVE-2021-28705[ 4 ] CVE-2021-28706      https://nvd.nist.gov/vuln/detail/CVE-2021-28706[ 5 ] CVE-2021-28707      https://nvd.nist.gov/vuln/detail/CVE-2021-28707[ 6 ] CVE-2021-28708      https://nvd.nist.gov/vuln/detail/CVE-2021-28708[ 7 ] CVE-2021-28709      https://nvd.nist.gov/vuln/detail/CVE-2021-28709[ 8 ] CVE-2022-23816      https://nvd.nist.gov/vuln/detail/CVE-2022-23816[ 9 ] CVE-2022-23824      https://nvd.nist.gov/vuln/detail/CVE-2022-23824[ 10 ] CVE-2022-23825      https://nvd.nist.gov/vuln/detail/CVE-2022-23825[ 11 ] CVE-2022-26356      https://nvd.nist.gov/vuln/detail/CVE-2022-26356[ 12 ] CVE-2022-26357      https://nvd.nist.gov/vuln/detail/CVE-2022-26357[ 13 ] CVE-2022-26358      https://nvd.nist.gov/vuln/detail/CVE-2022-26358[ 14 ] CVE-2022-26359      https://nvd.nist.gov/vuln/detail/CVE-2022-26359[ 15 ] CVE-2022-26360      https://nvd.nist.gov/vuln/detail/CVE-2022-26360[ 16 ] CVE-2022-26361      https://nvd.nist.gov/vuln/detail/CVE-2022-26361[ 17 ] CVE-2022-27672      https://nvd.nist.gov/vuln/detail/CVE-2022-27672[ 18 ] CVE-2022-29900      https://nvd.nist.gov/vuln/detail/CVE-2022-29900[ 19 ] CVE-2022-29901      https://nvd.nist.gov/vuln/detail/CVE-2022-29901[ 20 ] CVE-2022-33746      https://nvd.nist.gov/vuln/detail/CVE-2022-33746[ 21 ] CVE-2022-33747      https://nvd.nist.gov/vuln/detail/CVE-2022-33747[ 22 ] CVE-2022-33748      https://nvd.nist.gov/vuln/detail/CVE-2022-33748[ 23 ] CVE-2022-33749      https://nvd.nist.gov/vuln/detail/CVE-2022-33749[ 24 ] CVE-2022-42309      https://nvd.nist.gov/vuln/detail/CVE-2022-42309[ 25 ] CVE-2022-42310      https://nvd.nist.gov/vuln/detail/CVE-2022-42310[ 26 ] CVE-2022-42319      https://nvd.nist.gov/vuln/detail/CVE-2022-42319[ 27 ] CVE-2022-42320      https://nvd.nist.gov/vuln/detail/CVE-2022-42320[ 28 ] CVE-2022-42321      https://nvd.nist.gov/vuln/detail/CVE-2022-42321[ 29 ] CVE-2022-42322      https://nvd.nist.gov/vuln/detail/CVE-2022-42322[ 30 ] CVE-2022-42323      https://nvd.nist.gov/vuln/detail/CVE-2022-42323[ 31 ] CVE-2022-42324      https://nvd.nist.gov/vuln/detail/CVE-2022-42324[ 32 ] CVE-2022-42325      https://nvd.nist.gov/vuln/detail/CVE-2022-42325[ 33 ] CVE-2022-42326      https://nvd.nist.gov/vuln/detail/CVE-2022-42326[ 34 ] CVE-2022-42327      https://nvd.nist.gov/vuln/detail/CVE-2022-42327[ 35 ] CVE-2022-42330      https://nvd.nist.gov/vuln/detail/CVE-2022-42330[ 36 ] CVE-2022-42331      https://nvd.nist.gov/vuln/detail/CVE-2022-42331[ 37 ] CVE-2022-42332      https://nvd.nist.gov/vuln/detail/CVE-2022-42332[ 38 ] CVE-2022-42333      https://nvd.nist.gov/vuln/detail/CVE-2022-42333[ 39 ] CVE-2022-42334      https://nvd.nist.gov/vuln/detail/CVE-2022-42334[ 40 ] CVE-2022-42335      https://nvd.nist.gov/vuln/detail/CVE-2022-42335[ 41 ] XSA-351[ 42 ] XSA-355[ 43 ] XSA-385[ 44 ] XSA-387[ 45 ] XSA-388[ 46 ] XSA-389[ 47 ] XSA-397[ 48 ] XSA-399[ 49 ] XSA-400[ 50 ] XSA-407[ 51 ] XSA-412[ 52 ] XSA-414[ 53 ] XSA-415[ 54 ] XSA-416[ 55 ] XSA-417[ 56 ] XSA-418[ 57 ] XSA-419[ 58 ] XSA-420[ 59 ] XSA-421[ 60 ] XSA-422[ 61 ] XSA-425[ 62 ] XSA-430Availability============This GLSA and any updates to it are available for viewing atthe Gentoo Security Website: https://security.gentoo.org/glsa/202402-07Concerns?=========Security is a primary focus of Gentoo Linux and ensuring theconfidentiality and security of our users' machines is of utmostimportance to us. Any security concerns should be addressed [email protected] or alternatively, you may file a bug athttps://bugs.gentoo.org.License=======Copyright 2024 Gentoo Foundation, Inc; referenced textbelongs to its owner(s).The contents of this document are licensed under theCreative Commons - Attribution / Share Alike license.https://creativecommons.org/licenses/by-sa/2.5

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An update for kernel-rt is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu: AMD: Branch Type Confusion (non-retbleed) * CVE-2022-26373: hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions * ...

RHSA-2022:7337: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu: AMD: Branch Type Confusion (non-retbleed) * CVE-2022-26373: hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions * CVE...

RHSA-2022:7337: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu: AMD: Branch Type Confusion (non-retbleed) * CVE-2022-26373: hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions * CVE...

RHSA-2022:7337: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu: AMD: Branch Type Confusion (non-retbleed) * CVE-2022-26373: hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions * CVE...

RHSA-2022:7337: Red Hat Security Advisory: kernel security and bug fix update

An update for kernel is now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu: AMD: Branch Type Confusion (non-retbleed) * CVE-2022-26373: hw: cpu: Intel: Post-barrier Return Stack Buffer Predictions * CVE...

CVE-2022-42325

Xenstore: Guests can create arbitrary number of nodes via transactions T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] In case a node has been created in a transaction and it is later deleted in the same transaction, the transaction will be terminated with an error. As this error is encountered only when handling the deleted node at transaction finalization, the transaction will have been performed partially and without updating the accounting information. This will enable a malicious guest to create arbitrary number of nodes.

CVE-2022-42325

Xenstore: Guests can create arbitrary number of nodes via transactions T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] In case a node has been created in a transaction and it is later deleted in the same transaction, the transaction will be terminated with an error. As this error is encountered only when handling the deleted node at transaction finalization, the transaction will have been performed partially and without updating the accounting information. This will enable a malicious guest to create arbitrary number of nodes.

CVE-2022-42324

Oxenstored 32->31 bit integer truncation issues Integers in Ocaml are 63 or 31 bits of signed precision. The Ocaml Xenbus library takes a C uint32_t out of the ring and casts it directly to an Ocaml integer. In 64-bit Ocaml builds this is fine, but in 32-bit builds, it truncates off the most significant bit, and then creates unsigned/signed confusion in the remainder. This in turn can feed a negative value into logic not expecting a negative value, resulting in unexpected exceptions being thrown. The unexpected exception is not handled suitably, creating a busy-loop trying (and failing) to take the bad packet out of the xenstore ring.

CVE-2022-42322

Xenstore: Cooperating guests can create arbitrary numbers of nodes T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Since the fix of XSA-322 any Xenstore node owned by a removed domain will be modified to be owned by Dom0. This will allow two malicious guests working together to create an arbitrary number of Xenstore nodes. This is possible by domain A letting domain B write into domain A's local Xenstore tree. Domain B can then create many nodes and reboot. The nodes created by domain B will now be owned by Dom0. By repeating this process over and over again an arbitrary number of nodes can be created, as Dom0's number of nodes isn't limited by Xenstore quota.

CVE-2022-42322

Xenstore: Cooperating guests can create arbitrary numbers of nodes T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Since the fix of XSA-322 any Xenstore node owned by a removed domain will be modified to be owned by Dom0. This will allow two malicious guests working together to create an arbitrary number of Xenstore nodes. This is possible by domain A letting domain B write into domain A's local Xenstore tree. Domain B can then create many nodes and reboot. The nodes created by domain B will now be owned by Dom0. By repeating this process over and over again an arbitrary number of nodes can be created, as Dom0's number of nodes isn't limited by Xenstore quota.

CVE-2022-42327

x86: unintended memory sharing between guests On Intel systems that support the "virtualize APIC accesses" feature, a guest can read and write the global shared xAPIC page by moving the local APIC out of xAPIC mode. Access to this shared page bypasses the expected isolation that should exist between two guests.

CVE-2022-42321

Xenstore: Guests can crash xenstored via exhausting the stack Xenstored is using recursion for some Xenstore operations (e.g. for deleting a sub-tree of Xenstore nodes). With sufficiently deep nesting levels this can result in stack exhaustion on xenstored, leading to a crash of xenstored.

CVE-2022-42320

Xenstore: Guests can get access to Xenstore nodes of deleted domains Access rights of Xenstore nodes are per domid. When a domain is gone, there might be Xenstore nodes left with access rights containing the domid of the removed domain. This is normally no problem, as those access right entries will be corrected when such a node is written later. There is a small time window when a new domain is created, where the access rights of a past domain with the same domid as the new one will be regarded to be still valid, leading to the new domain being able to get access to a node which was meant to be accessible by the removed domain. For this to happen another domain needs to write the node before the newly created domain is being introduced to Xenstore by dom0.

CVE-2022-42309

Xenstore: Guests can crash xenstored Due to a bug in the fix of XSA-115 a malicious guest can cause xenstored to use a wrong pointer during node creation in an error path, resulting in a crash of xenstored or a memory corruption in xenstored causing further damage. Entering the error path can be controlled by the guest e.g. by exceeding the quota value of maximum nodes per domain.

CVE-2022-42310

Xenstore: Guests can create orphaned Xenstore nodes By creating multiple nodes inside a transaction resulting in an error, a malicious guest can create orphaned nodes in the Xenstore data base, as the cleanup after the error will not remove all nodes already created. When the transaction is committed after this situation, nodes without a valid parent can be made permanent in the data base.

CVE-2022-42319

Xenstore: Guests can cause Xenstore to not free temporary memory When working on a request of a guest, xenstored might need to allocate quite large amounts of memory temporarily. This memory is freed only after the request has been finished completely. A request is regarded to be finished only after the guest has read the response message of the request from the ring page. Thus a guest not reading the response can cause xenstored to not free the temporary memory. This can result in memory shortages causing Denial of Service (DoS) of xenstored.

Red Hat Security Advisory 2022-7110-01

Red Hat Security Advisory 2022-7110-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include code execution, information leakage, memory leak, privilege escalation, and use-after-free vulnerabilities.

Red Hat Security Advisory 2022-7110-01

Red Hat Security Advisory 2022-7110-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include code execution, information leakage, memory leak, privilege escalation, and use-after-free vulnerabilities.

Red Hat Security Advisory 2022-7110-01

Red Hat Security Advisory 2022-7110-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include code execution, information leakage, memory leak, privilege escalation, and use-after-free vulnerabilities.

Red Hat Security Advisory 2022-7110-01

Red Hat Security Advisory 2022-7110-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include code execution, information leakage, memory leak, privilege escalation, and use-after-free vulnerabilities.

RHSA-2022:7134: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: c...

RHSA-2022:7134: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: c...

RHSA-2022:7134: Red Hat Security Advisory: kernel-rt security and bug fix update

An update for kernel-rt is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: c...

RHSA-2022:7110: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu:...

RHSA-2022:7110: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu:...

RHSA-2022:7110: Red Hat Security Advisory: kernel security, bug fix, and enhancement update

An update for kernel is now available for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original. Related CVEs: * CVE-2022-0494: kernel: information leak in scsi_ioctl() * CVE-2022-1353: Kernel: A kernel-info-leak issue in pfkey_register * CVE-2022-2588: kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation * CVE-2022-23816: hw: cpu: AMD: RetBleed Arbitrary Speculative Code Execution with Return Instructions * CVE-2022-23825: hw: cpu:...

CVE-2022-33748

lock order inversion in transitive grant copy handling As part of XSA-226 a missing cleanup call was inserted on an error handling path. While doing so, locking requirements were not paid attention to. As a result two cooperating guests granting each other transitive grants can cause locks to be acquired nested within one another, but in respectively opposite order. With suitable timing between the involved grant copy operations this may result in the locking up of a CPU.

CVE-2022-33747

Arm: unbounded memory consumption for 2nd-level page tables Certain actions require e.g. removing pages from a guest's P2M (Physical-to-Machine) mapping. When large pages are in use to map guest pages in the 2nd-stage page tables, such a removal operation may incur a memory allocation (to replace a large mapping with individual smaller ones). These memory allocations are taken from the global memory pool. A malicious guest might be able to cause the global memory pool to be exhausted by manipulating its own P2M mappings.

CVE-2022-33746

P2M pool freeing may take excessively long The P2M pool backing second level address translation for guests may be of significant size. Therefore its freeing may take more time than is reasonable without intermediate preemption checks. Such checking for the need to preempt was so far missing.

CVE-2022-33749

XAPI open file limit DoS It is possible for an unauthenticated client on the network to cause XAPI to hit its file-descriptor limit. This causes XAPI to be unable to accept new requests for other (trusted) clients, and blocks XAPI from carrying out any tasks that require the opening of file descriptors.

Ubuntu Security Notice USN-5565-1

Ubuntu Security Notice 5565-1 - Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not properly remove all references to a route filter before freeing it in some situations. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the netfilter subsystem of the Linux kernel did not prevent one nft object from referencing an nft set in another nft table, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.

Ubuntu Security Notice USN-5564-1

Ubuntu Security Notice 5564-1 - Zhenpeng Lin discovered that the network packet scheduler implementation in the Linux kernel did not properly remove all references to a route filter before freeing it in some situations. A local attacker could use this to cause a denial of service or execute arbitrary code. It was discovered that the netfilter subsystem of the Linux kernel did not prevent one nft object from referencing an nft set in another nft table, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or execute arbitrary code.

CVE-2022-29900: 407 - Xen Security Advisories

AMD microprocessor families 15h to 18h are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29901: oss-security - Xen Security Advisory 407 v1 (CVE-2022-23816,CVE-2022-23825,CVE-2022-29900) - Retbleed

Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29900: 407 - Xen Security Advisories

AMD microprocessor families 15h to 18h are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29900: 407 - Xen Security Advisories

AMD microprocessor families 15h to 18h are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29900: 407 - Xen Security Advisories

AMD microprocessor families 15h to 18h are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29901: oss-security - Xen Security Advisory 407 v1 (CVE-2022-23816,CVE-2022-23825,CVE-2022-29900) - Retbleed

Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-29901: oss-security - Xen Security Advisory 407 v1 (CVE-2022-23816,CVE-2022-23825,CVE-2022-29900) - Retbleed

Intel microprocessor generations 6 to 8 are affected by a new Spectre variant that is able to bypass their retpoline mitigation in the kernel to leak arbitrary data. An attacker with unprivileged user access can hijack return instructions to achieve arbitrary speculative code execution under certain microarchitecture-dependent conditions.

CVE-2022-26361

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVE-2022-26361

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVE-2022-26361

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVE-2022-26356

Racy interactions between dirty vram tracking and paging log dirty hypercalls Activation of log dirty mode done by XEN_DMOP_track_dirty_vram (was named HVMOP_track_dirty_vram before Xen 4.9) is racy with ongoing log dirty hypercalls. A suitably timed call to XEN_DMOP_track_dirty_vram can enable log dirty while another CPU is still in the process of tearing down the structures related to a previously enabled log dirty mode (XEN_DOMCTL_SHADOW_OP_OFF). This is due to lack of mutually exclusive locking between both operations and can lead to entries being added in already freed slots, resulting in a memory leak.

CVE-2022-26361

IOMMU: RMRR (VT-d) and unity map (AMD-Vi) handling issues T[his CNA information record relates to multiple CVEs; the text explains which aspects/vulnerabilities correspond to which CVE.] Certain PCI devices in a system might be assigned Reserved Memory Regions (specified via Reserved Memory Region Reporting, "RMRR") for Intel VT-d or Unity Mapping ranges for AMD-Vi. These are typically used for platform tasks such as legacy USB emulation. Since the precise purpose of these regions is unknown, once a device associated with such a region is active, the mappings of these regions need to remain continuouly accessible by the device. This requirement has been violated. Subsequent DMA or interrupts from the device may have unpredictable behaviour, ranging from IOMMU faults to memory corruption.

CVE-2022-26357

race in VT-d domain ID cleanup Xen domain IDs are up to 15 bits wide. VT-d hardware may allow for only less than 15 bits to hold a domain ID associating a physical device with a particular domain. Therefore internally Xen domain IDs are mapped to the smaller value range. The cleaning up of the housekeeping structures has a race, allowing for VT-d domain IDs to be leaked and flushes to be bypassed.

Packet Storm: Latest News

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