Use After Free Affecting perf-debuginfo package, versions <0:4.4.39-34.54.amzn1


Severity

Recommended
medium

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-AMZN201803-PERFDEBUGINFO-1703426
  • published27 Sept 2021
  • disclosed28 Dec 2016

Introduced: 28 Dec 2016

CVE-2016-9576  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 perf-debuginfo to version 0:4.4.39-34.54.amzn1 or higher.
This issue was patched in ALAS-2017-782.

NVD Description

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

The blk_rq_map_user_iov function in block/blk-map.c in the Linux kernel before 4.8.14 does not properly restrict the type of iterator, which allows local users to read or write to arbitrary kernel memory locations or cause a denial of service (use-after-free) by leveraging access to a /dev/sg device.

CVSS Scores

version 3.1