Use After Free Affecting kernel-libbpf package, versions <0:6.1.77-99.164.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
0.41% (74th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELLIBBPF-6393533
  • published6 Mar 2024
  • disclosed31 Jan 2024

Introduced: 31 Jan 2024

CVE-2024-1086  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-libbpf to version 0:6.1.77-99.164.amzn2023 or higher.
This issue was patched in ALAS2023-2024-517.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-libbpf package and not the kernel-libbpf package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Scores

version 3.1