Access Restriction Bypass Affecting kernel package, versions <0:4.1.17-22.30.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNEL-1693348
  • published27 Sept 2021
  • disclosed8 Feb 2016

Introduced: 8 Feb 2016

CVE-2015-8709  (opens in a new tab)
CWE-264  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel to version 0:4.1.17-22.30.amzn1 or higher.
This issue was patched in ALAS-2016-648.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

kernel/ptrace.c in the Linux kernel through 4.4.1 mishandles uid and gid mappings, which allows local users to gain privileges by establishing a user namespace, waiting for a root process to enter that namespace with an unsafe uid or gid, and then using the ptrace system call. NOTE: the vendor states "there is no kernel bug here.

References

CVSS Scores

version 3.1