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Red Hat Security Advisory 2023-4817-01

Red Hat Security Advisory 2023-4817-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include out of bounds access and out of bounds write vulnerabilities.

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=====================================================================
Red Hat Security Advisory

Synopsis: Important: kernel-rt security and bug fix update
Advisory ID: RHSA-2023:4817-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2023:4817
Issue date: 2023-08-29
CVE Names: CVE-2023-2124 CVE-2023-3090 CVE-2023-35788
=====================================================================

  1. Summary:

An update for kernel-rt is now available for Red Hat Enterprise Linux 8.2
Telecommunications Update Service.

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.

  1. Relevant releases/architectures:

Red Hat Enterprise Linux Real Time TUS (v. 8.2) - x86_64
Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2) - x86_64

  1. Description:

The kernel-rt packages provide the Real Time Linux Kernel, which enables
fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

  • kernel: ipvlan: out-of-bounds write caused by unclear skb->cb
    (CVE-2023-3090)

  • kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()
    (CVE-2023-35788)

  • kernel: OOB access in the Linux kernel’s XFS subsystem (CVE-2023-2124)

For more details about the security issue(s), including the impact, a CVSS
score, acknowledgments, and other related information, refer to the CVE
page(s) listed in the References section.

Bug Fix(es):

  • kernel-rt: update RT source tree to the RHEL-8.2.z28 source tree
    (BZ#2228917)
  1. Solution:

For details on how to apply this update, which includes the changes
described in this advisory, refer to:

https://access.redhat.com/articles/11258

The system must be rebooted for this update to take effect.

  1. Bugs fixed (https://bugzilla.redhat.com/):

2187439 - CVE-2023-2124 kernel: OOB access in the Linux kernel’s XFS subsystem
2215768 - CVE-2023-35788 kernel: cls_flower: out-of-bounds write in fl_set_geneve_opt()
2218672 - CVE-2023-3090 kernel: ipvlan: out-of-bounds write caused by unclear skb->cb

  1. Package List:

Red Hat Enterprise Linux Real Time for NFV TUS (v. 8.2):

Source:
kernel-rt-4.18.0-193.113.1.rt13.164.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-kvm-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-kvm-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm

Red Hat Enterprise Linux Real Time TUS (v. 8.2):

Source:
kernel-rt-4.18.0-193.113.1.rt13.164.el8_2.src.rpm

x86_64:
kernel-rt-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-core-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-core-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-debuginfo-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-devel-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-modules-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debug-modules-extra-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debuginfo-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-debuginfo-common-x86_64-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-devel-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-modules-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm
kernel-rt-modules-extra-4.18.0-193.113.1.rt13.164.el8_2.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

  1. References:

https://access.redhat.com/security/cve/CVE-2023-2124
https://access.redhat.com/security/cve/CVE-2023-3090
https://access.redhat.com/security/cve/CVE-2023-35788
https://access.redhat.com/security/updates/classification/#important

  1. Contact:

The Red Hat security contact is [email protected]. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2023 Red Hat, Inc.
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Ubuntu Security Notice 6261-1 - It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges.

Ubuntu Security Notice USN-6260-1

Ubuntu Security Notice 6260-1 - 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. Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges.

Ubuntu Security Notice USN-6255-1

Ubuntu Security Notice 6255-1 - It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Mingi Cho discovered that the netfilter subsystem in the Linux kernel did not properly validate the status of a nft chain while performing a lookup by id, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-6254-1

Ubuntu Security Notice 6254-1 - Jordy Zomer and Alexandra Sandulescu discovered that syscalls invoking the do_prlimit function in the Linux kernel did not properly handle speculative execution barriers. A local attacker could use this to expose sensitive information. It was discovered that a race condition existed in the btrfs file system implementation in the Linux kernel, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly expose sensitive information.

Ubuntu Security Notice USN-6250-1

Ubuntu Security Notice 6250-1 - Stonejiajia, Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in the Ubuntu Linux kernel did not properly perform permission checks in certain situations. A local attacker could possibly use this to gain elevated privileges. It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

Ubuntu Security Notice USN-6246-1

Ubuntu Security Notice 6246-1 - It was discovered that the IP-VLAN network driver for the Linux kernel did not properly initialize memory in some situations, leading to an out-of- bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Mingi Cho discovered that the netfilter subsystem in the Linux kernel did not properly validate the status of a nft chain while performing a lookup by id, leading to a use-after-free vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code.

Red Hat Security Advisory 2023-4138-01

Red Hat Security Advisory 2023-4138-01 - The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Issues addressed include out of bounds access and use-after-free vulnerabilities.

Red Hat Security Advisory 2023-4137-01

Red Hat Security Advisory 2023-4137-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include out of bounds access and use-after-free vulnerabilities.

Ubuntu Security Notice USN-6228-1

Ubuntu Security Notice 6228-1 - It was discovered that the XFS file system implementation in the Linux kernel did not properly perform metadata validation when mounting certain images. An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service. Wei Chen discovered that the InfiniBand RDMA communication manager implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6224-1

Ubuntu Security Notice 6224-1 - It was discovered that the XFS file system implementation in the Linux kernel did not properly perform metadata validation when mounting certain images. An attacker could use this to specially craft a file system image that, when mounted, could cause a denial of service. Wei Chen discovered that the InfiniBand RDMA communication manager implementation in the Linux kernel contained an out-of-bounds read vulnerability. A local attacker could use this to cause a denial of service.

Ubuntu Security Notice USN-6212-1

Ubuntu Security Notice 6212-1 - Hangyu Hua discovered that the Flower classifier implementation in the Linux kernel contained an out-of-bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. It was discovered that for some Intel processors the INVLPG instruction implementation did not properly flush global TLB entries when PCIDs are enabled. An attacker could use this to expose sensitive information or possibly cause undesired behaviors.

Ubuntu Security Notice USN-6194-1

Ubuntu Security Notice 6194-1 - Hangyu Hua discovered that the Flower classifier implementation in the Linux kernel contained an out-of-bounds write vulnerability. An attacker could use this to cause a denial of service or possibly execute arbitrary code. Xingyuan Mo and Gengjia Chen discovered that the io_uring subsystem in the Linux kernel did not properly handle locking when IOPOLL mode is being used. A local attacker could use this to cause a denial of service.

Red Hat Security Advisory 2023-3723-01

Red Hat Security Advisory 2023-3723-01 - The kernel packages contain the Linux kernel, the core of any Linux operating system. Issues addressed include null pointer, out of bounds access, out of bounds write, privilege escalation, and use-after-free vulnerabilities.

CVE-2023-2124

An out-of-bounds memory access flaw was found in the Linux kernel’s XFS file system in how a user restores an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or potentially escalate their privileges on the system.

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