Amazon Linux 2 Security Advisory: ALAS-2024-2453
Advisory Release Date: 2024-02-15 03:52 Pacific
Advisory Updated Date: 2024-02-19 17:37 Pacific
Severity:
Important
Issue Overview:
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
The nft_verdict_init() function allows positive values as drop error within the hook verdict, and hence the nf_hook_slow() function can cause a double free vulnerability when NF_DROP is issued with a drop error which resembles NF_ACCEPT.
We recommend upgrading past commit f342de4e2f33e0e39165d8639387aa6c19dff660. (CVE-2024-1086)
Affected Packages:
kernel
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update kernel to update your system.
New Packages:
aarch64:
kernel-4.14.336-256.559.amzn2.aarch64
kernel-headers-4.14.336-256.559.amzn2.aarch64
kernel-debuginfo-common-aarch64-4.14.336-256.559.amzn2.aarch64
perf-4.14.336-256.559.amzn2.aarch64
perf-debuginfo-4.14.336-256.559.amzn2.aarch64
python-perf-4.14.336-256.559.amzn2.aarch64
python-perf-debuginfo-4.14.336-256.559.amzn2.aarch64
kernel-tools-4.14.336-256.559.amzn2.aarch64
kernel-tools-devel-4.14.336-256.559.amzn2.aarch64
kernel-tools-debuginfo-4.14.336-256.559.amzn2.aarch64
kernel-devel-4.14.336-256.559.amzn2.aarch64
kernel-debuginfo-4.14.336-256.559.amzn2.aarch64
i686:
kernel-headers-4.14.336-256.559.amzn2.i686
src:
kernel-4.14.336-256.559.amzn2.src
x86_64:
kernel-4.14.336-256.559.amzn2.x86_64
kernel-headers-4.14.336-256.559.amzn2.x86_64
kernel-debuginfo-common-x86_64-4.14.336-256.559.amzn2.x86_64
perf-4.14.336-256.559.amzn2.x86_64
perf-debuginfo-4.14.336-256.559.amzn2.x86_64
python-perf-4.14.336-256.559.amzn2.x86_64
python-perf-debuginfo-4.14.336-256.559.amzn2.x86_64
kernel-tools-4.14.336-256.559.amzn2.x86_64
kernel-tools-devel-4.14.336-256.559.amzn2.x86_64
kernel-tools-debuginfo-4.14.336-256.559.amzn2.x86_64
kernel-devel-4.14.336-256.559.amzn2.x86_64
kernel-debuginfo-4.14.336-256.559.amzn2.x86_64
kernel-livepatch-4.14.336-256.559-1.0-0.amzn2.x86_64