1. Ubuntu Security Notices
  2. USN-6676-1

USN-6676-1: c-ares vulnerability

Publication date

6 March 2024

Overview

c-ares could be made to crash if it received specially crafted input.

Releases

Packages

  • c-ares - library for asynchronous name resolution

Details

Vojtěch Vobr discovered that c-ares incorrectly handled user input from
local configuration files. An attacker could possibly use this issue to
cause a denial of service via application crash.

Vojtěch Vobr discovered that c-ares incorrectly handled user input from
local configuration files. An attacker could possibly use this issue to
cause a denial of service via application crash.

Update instructions

In general, a standard system update will make all the necessary changes.

Learn more about how to get the fixes.

The problem can be corrected by updating your system to the following package versions:

Ubuntu Release Package Version
23.10 mantic libc-ares2 –  1.19.1-3ubuntu0.1
22.04 jammy libc-ares2 –  1.18.1-1ubuntu0.22.04.3
20.04 focal libc-ares2 –  1.15.0-1ubuntu0.5
18.04 bionic libc-ares2 –  1.14.0-1ubuntu0.2+esm2  
16.04 xenial libc-ares2 –  1.10.0-3ubuntu0.2+esm3  

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References

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