Buffer Under-read Affecting c-ares package, versions <0:1.10.0-3.amzn2.0.6


Severity

Recommended
0.0
medium
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-AMZN2-CARES-6457607
  • published19 Mar 2024
  • disclosed23 Feb 2024

Introduced: 23 Feb 2024

CVE-2024-25629  (opens in a new tab)
CWE-127  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 c-ares to version 0:1.10.0-3.amzn2.0.6 or higher.
This issue was patched in ALAS2-2024-2494.

NVD Description

Note: Versions mentioned in the description apply only to the upstream c-ares package and not the c-ares package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

c-ares is a C library for asynchronous DNS requests. ares__read_line() is used to parse local configuration files such as /etc/resolv.conf, /etc/nsswitch.conf, the HOSTALIASES file, and if using a c-ares version prior to 1.27.0, the /etc/hosts file. If any of these configuration files has an embedded NULL character as the first character in a new line, it can lead to attempting to read memory prior to the start of the given buffer which may result in a crash. This issue is fixed in c-ares 1.27.0. No known workarounds exist.

CVSS Scores

version 3.1