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Ubuntu Security Notice USN-6221-1

Ubuntu Security Notice 6221-1 - It was discovered that a race condition existed in the overlay file system implementation in the Linux kernel. A local attacker could use this to cause a denial of service. It was discovered that the virtual terminal device implementation in the Linux kernel contained a race condition in its ioctl handling that led to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information.

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==========================================================================Ubuntu Security Notice USN-6221-1July 12, 2023linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities==========================================================================A security issue affects these releases of Ubuntu and its derivatives:- Ubuntu 16.04 LTS (Available with Ubuntu Pro)- Ubuntu 14.04 LTS (Available with Ubuntu Pro)Summary:Several security issues were fixed in the Linux kernel.Software Description:- linux: Linux kernel- linux-aws: Linux kernel for Amazon Web Services (AWS) systems- linux-kvm: Linux kernel for cloud environments- linux-lts-xenial: Linux hardware enablement kernel from Xenial for TrustyDetails:It was discovered that a race condition existed in the overlay file systemimplementation in the Linux kernel. A local attacker could use this tocause a denial of service (system crash). (CVE-2021-20321)It was discovered that the virtual terminal (vt) device implementation inthe Linux kernel contained a race condition in its ioctl handling that ledto an out-of-bounds read vulnerability. A local attacker could possibly usethis to expose sensitive information. (CVE-2021-3753)It was discovered that the ext4 file system implementation in the Linuxkernel contained a use-after-free vulnerability. An attacker could use thisto construct a malicious ext4 file system image that, when mounted, couldcause a denial of service (system crash). (CVE-2022-1184)Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildanand Ariel Sabba discovered that some Intel processors with EnhancedIndirect Branch Restricted Speculation (eIBRS) did not properly handle RETinstructions after a VM exits. A local attacker could potentially use thisto expose sensitive information. (CVE-2022-26373)Johannes Wikner and Kaveh Razavi discovered that for some Intel x86-64processors, the Linux kernel's protections against speculative branchtarget injection attacks were insufficient in some circumstances. A localattacker could possibly use this to expose sensitive information.(CVE-2022-29901)It was discovered that the ST NCI NFC driver did not properly handle deviceremoval events. A physically proximate attacker could use this to cause adenial of service (system crash). (CVE-2023-1990)It was discovered that the btrfs file system implementation in the Linuxkernel did not properly handle error conditions in some situations, leadingto a use-after-free vulnerability. A local attacker could possibly use thisto cause a denial of service (system crash). (CVE-2023-3111)Update instructions:The problem can be corrected by updating your system to the followingpackage versions:Ubuntu 16.04 LTS (Available with Ubuntu Pro):   linux-image-4.4.0-1121-kvm      4.4.0-1121.131   linux-image-4.4.0-1158-aws      4.4.0-1158.173   linux-image-4.4.0-242-generic   4.4.0-242.276   linux-image-4.4.0-242-lowlatency  4.4.0-242.276   linux-image-aws                 4.4.0.1158.162   linux-image-generic             4.4.0.242.248   linux-image-generic-lts-xenial  4.4.0.242.248   linux-image-kvm                 4.4.0.1121.118   linux-image-lowlatency          4.4.0.242.248   linux-image-lowlatency-lts-xenial  4.4.0.242.248   linux-image-virtual             4.4.0.242.248   linux-image-virtual-lts-xenial  4.4.0.242.248Ubuntu 14.04 LTS (Available with Ubuntu Pro):   linux-image-4.4.0-1120-aws      4.4.0-1120.126   linux-image-4.4.0-242-generic   4.4.0-242.276~14.04.1   linux-image-4.4.0-242-lowlatency  4.4.0-242.276~14.04.1   linux-image-aws                 4.4.0.1120.117   linux-image-generic-lts-xenial  4.4.0.242.210   linux-image-lowlatency-lts-xenial  4.4.0.242.210   linux-image-virtual-lts-xenial  4.4.0.242.210After a standard system update you need to reboot your computer to makeall the necessary changes.ATTENTION: Due to an unavoidable ABI change the kernel updates havebeen given a new version number, which requires you to recompile andreinstall all third party kernel modules you might have installed.Unless you manually uninstalled the standard kernel metapackages(e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,linux-powerpc), a standard system upgrade will automatically performthis as well.References:   https://ubuntu.com/security/notices/USN-6221-1   CVE-2021-20321, CVE-2021-3753, CVE-2022-1184, CVE-2022-26373,   CVE-2022-29901, CVE-2023-1990, CVE-2023-3111

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Ubuntu Security Notice USN-6337-1

Ubuntu Security Notice 6337-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6332-1

Ubuntu Security Notice 6332-1 - Daniel Moghimi discovered that some Intel Processors did not properly clear microarchitectural state after speculative execution of various instructions. A local unprivileged user could use this to obtain to sensitive information. William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6331-1

Ubuntu Security Notice 6331-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6314-1

Ubuntu Security Notice 6314-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6312-1

Ubuntu Security Notice 6312-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6311-1

Ubuntu Security Notice 6311-1 - William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service. It was discovered that the NTFS file system implementation in the Linux kernel did not properly check buffer indexes in certain situations, leading to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information.

Debian Security Advisory 5480-1

Debian Linux Security Advisory 5480-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

Ubuntu Security Notice USN-6301-1

Ubuntu Security Notice 6301-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6300-1

Ubuntu Security Notice 6300-1 - William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service. It was discovered that the NTFS file system implementation in the Linux kernel did not properly check buffer indexes in certain situations, leading to an out-of-bounds read vulnerability. A local attacker could possibly use this to expose sensitive information.

Ubuntu Security Notice USN-6284-1

Ubuntu Security Notice 6284-1 - It was discovered that the netlink implementation in the Linux kernel did not properly validate policies when parsing attributes in some situations. An attacker could use this to cause a denial of service. Billy Jheng Bing Jhong discovered that the CIFS network file system implementation in the Linux kernel did not properly validate arguments to ioctl in some situations. A local attacker could possibly use this to cause a denial of service.

Ubuntu Security Notice USN-6186-1

Ubuntu Security Notice 6186-1 - Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Gwangun Jung discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-6175-1

Ubuntu Security Notice 6175-1 - Patryk Sondej and Piotr Krysiuk discovered that a race condition existed in the netfilter subsystem of the Linux kernel when processing batch requests, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Gwangun Jung discovered that the Quick Fair Queueing scheduler implementation in the Linux kernel contained an out-of-bounds write vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

CVE-2023-3111: fs: btrfs: fix a possible use-after-free bug caused by incorrect error handling in prepare_to_relocate()

A use after free vulnerability was found in prepare_to_relocate in fs/btrfs/relocation.c in btrfs in the Linux Kernel. This possible flaw can be triggered by calling btrfs_ioctl_balance() before calling btrfs_ioctl_defrag().

Ubuntu Security Notice USN-6033-1

Ubuntu Security Notice 6033-1 - It was discovered that the Traffic-Control Index implementation in the Linux kernel did not properly perform filter deactivation in some situations. A local attacker could possibly use this to gain elevated privileges. Please note that with the fix for thisCVE, kernel support for the TCINDEX classifier has been removed. William Zhao discovered that the Traffic Control subsystem in the Linux kernel did not properly handle network packet retransmission in certain situations. A local attacker could use this to cause a denial of service.

CVE-2023-1990: [PATCH] nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition

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Ubuntu Security Notice USN-5862-1

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Ubuntu Security Notice USN-5854-1

Ubuntu Security Notice 5854-1 - It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code. Pawan Kumar Gupta, Alyssa Milburn, Amit Peled, Shani Rehana, Nir Shildan and Ariel Sabba discovered that some Intel processors with Enhanced Indirect Branch Restricted Speculation did not properly handle RET instructions after a VM exits. A local attacker could potentially use this to expose sensitive information.

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RHSA-2022:7933: Red Hat Security Advisory: kernel-rt security and bug fix update

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CVE-2022-43449: en/security-disclosure/2022/2022-11.md · OpenHarmony/security - Gitee.com

OpenHarmony-v3.1.2 and prior versions had an Arbitrary file read vulnerability via download_server. Local attackers can install an malicious application on the device and reveal any file from the filesystem that is accessible to download_server service which run with UID 1000.

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Debian Security Advisory 5257-1

Debian Linux Security Advisory 5257-1 - Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.

Ubuntu Security Notice USN-5682-1

Ubuntu Security Notice 5682-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-5668-1

Ubuntu Security Notice 5668-1 - It was discovered that the BPF verifier in the Linux kernel did not properly handle internal data structures. A local attacker could use this to expose sensitive information. It was discovered that an out-of-bounds write vulnerability existed in the Video for Linux 2 implementation in the Linux kernel. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.

CVE-2022-1184: Invalid Bug ID

A use-after-free flaw was found in fs/ext4/namei.c:dx_insert_block() in the Linux kernel’s filesystem sub-component. This flaw allows a local attacker with a user privilege to cause a denial of service.

Retbleed Fixed in Linux Kernel, Patch Delayed

Linus Torvalds says Retbleed has been addressed in the Linux kernel, but code complexity means the release will be delayed by a week to give more time for testing.

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CVE-2022-26657: Pexip security bulletins | Pexip Infinity Docs

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CVE-2022-27936: Pexip security bulletins | Pexip Infinity Docs

Pexip Infinity before 27.3 allows remote attackers to trigger a software abort via H.323.

CVE-2022-27931: Pexip security bulletins | Pexip Infinity Docs

Pexip Infinity before 27.3 allows remote attackers to trigger a software abort via the Session Initiation Protocol.

CVE-2022-27930: Pexip security bulletins | Pexip Infinity Docs

Pexip Infinity 27.x before 27.3 allows remote attackers to trigger a software abort via single-sign-on if a random Universally Unique Identifier is guessed.

CVE-2022-27933: Pexip security bulletins | Pexip Infinity Docs

Pexip Infinity before 27.3 allows remote attackers to trigger a software abort via One Touch Join.

CVE-2022-27935: Pexip security bulletins | Pexip Infinity Docs

Pexip Infinity before 27.3 allows remote attackers to trigger a software abort via Epic Telehealth.

New 'Retbleed' Speculative Execution Attack Affects AMD and Intel CPUs

Security researchers have uncovered yet another vulnerability affecting numerous older AMD and Intel microprocessors that could bypass current defenses and result in Spectre-based speculative-execution attacks. Dubbed Retbleed by ETH Zurich researchers Johannes Wikner and Kaveh Razavi, the issues are tracked as CVE-2022-29900 (AMD) and CVE-2022-29901 (Intel), with the chipmakers releasing

CVE-2021-40012: July

Vulnerability of pointers being incorrectly used during data transmission in the video framework. Successful exploitation of this vulnerability may affect confidentiality.

CVE-2021-40012: July

Vulnerability of pointers being incorrectly used during data transmission in the video framework. Successful exploitation of this vulnerability may affect confidentiality.

CVE-2022-20233: Pixel Update Bulletin—June 2022  |  Android Open Source Project

In param_find_digests_internal and related functions of the Titan-M source, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-222472803References: N/A

CVE-2022-20233: Pixel Update Bulletin—June 2022  |  Android Open Source Project

In param_find_digests_internal and related functions of the Titan-M source, there is a possible out of bounds write due to an incorrect bounds check. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-222472803References: N/A

CVE-2021-3753: Invalid Bug ID

A race problem was seen in the vt_k_ioctl in drivers/tty/vt/vt_ioctl.c in the Linux kernel, which may cause an out of bounds read in vt as the write access to vc_mode is not protected by lock-in vt_ioctl (KDSETMDE). The highest threat from this vulnerability is to data confidentiality.

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