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Date: Fri, 23 Feb 2024 07:32:30 -0500
From: Brad House <>
Subject: c-ares CVE-2024-25629

There is a single security vulnerability in c-ares that has been 
released with c-ares 1.27.0.

*CVE-2024-25629 *


|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 1.22.0, 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.


Fixed in c-ares 1.27.0


No workarounds exist.


Vojtěch Vobr

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