ALAS-2024-1899


Amazon Linux 1 Security Advisory: ALAS-2024-1899
Advisory Release Date: 2024-01-03 22:37 Pacific
Advisory Updated Date: 2024-07-03 21:01 Pacific
Severity: Important

Issue Overview:

2024-07-03: CVE-2023-52813 was added to this advisory.

2024-06-07: CVE-2023-52881 was added to this advisory.

2024-02-01: CVE-2023-0590 was added to this advisory.

2024-01-19: CVE-2023-52340 was added to this advisory.

A use-after-free flaw was found in qdisc_graft in net/sched/sch_api.c in the Linux Kernel due to a race problem. This flaw leads to a denial of service issue. (CVE-2023-0590)

When a router encounters an IPv6 packet too big to transmit to the next-hop, it returns an ICMP6 "Packet Too Big" (PTB) message to the sender. The sender caches this updated Maximum Transmission Unit (MTU) so it knows not to exceed this value when subsequently routing to the same host.

In Linux kernels prior to 6.3, garbage collection is run on the IPv6 Destination Route Cache if the number of entries exceeds a threshold when adding the destination to the cache. This garbage collection examines every entry in the cache while holding a lock. In these affected kernel versions, a flood of the IPv6 ICMP6 PTB messages could cause high lock contention and increased CPU usage, leading to a Denial-of-Service.

The fix backports the garbage collection improvements from Linux kernel 6.3 by bringing the IPv6 code closer to the IPv4 code, which does not have this issue.

Patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=af6d10345ca76670c1b7c37799f0d5576ccef277 (CVE-2023-52340)

In the Linux kernel, the following vulnerability has been resolved:

crypto: pcrypt - Fix hungtask for PADATA_RESET (CVE-2023-52813)

In the Linux kernel, the following vulnerability has been resolved:

tcp: do not accept ACK of bytes we never sent (CVE-2023-52881)

A use-after-free vulnerability in the Linux kernel's ipv4: igmp component can be exploited to achieve local privilege escalation.

A race condition can be exploited to cause a timer be mistakenly registered on a RCU read locked object which is freed by another thread.

We recommend upgrading past commit e2b706c691905fe78468c361aaabc719d0a496f1. (CVE-2023-6932)


Affected Packages:

kernel


Issue Correction:
Run yum update kernel to update your system.

New Packages:
i686:
    perf-debuginfo-4.14.334-177.552.amzn1.i686
    kernel-tools-devel-4.14.334-177.552.amzn1.i686
    kernel-tools-debuginfo-4.14.334-177.552.amzn1.i686
    kernel-headers-4.14.334-177.552.amzn1.i686
    kernel-4.14.334-177.552.amzn1.i686
    kernel-devel-4.14.334-177.552.amzn1.i686
    kernel-debuginfo-4.14.334-177.552.amzn1.i686
    kernel-tools-4.14.334-177.552.amzn1.i686
    perf-4.14.334-177.552.amzn1.i686
    kernel-debuginfo-common-i686-4.14.334-177.552.amzn1.i686

src:
    kernel-4.14.334-177.552.amzn1.src

x86_64:
    perf-4.14.334-177.552.amzn1.x86_64
    kernel-tools-debuginfo-4.14.334-177.552.amzn1.x86_64
    kernel-tools-4.14.334-177.552.amzn1.x86_64
    kernel-tools-devel-4.14.334-177.552.amzn1.x86_64
    kernel-debuginfo-common-x86_64-4.14.334-177.552.amzn1.x86_64
    kernel-headers-4.14.334-177.552.amzn1.x86_64
    perf-debuginfo-4.14.334-177.552.amzn1.x86_64
    kernel-4.14.334-177.552.amzn1.x86_64
    kernel-devel-4.14.334-177.552.amzn1.x86_64
    kernel-debuginfo-4.14.334-177.552.amzn1.x86_64