1. Ubuntu Security Notices
  2. USN-5907-1

USN-5907-1: c-ares vulnerability

Publication date

2 March 2023

Overview

c-ares could be made to crash or run programs if it processed specially crafted input.

Releases

Packages

  • c-ares - library for asynchronous name resolution

Details

It was discovered that c-ares incorrectly handled certain sortlist strings.
A remote attacker could use this issue to cause c-ares to crash, resulting
in a denial of service, or possibly execute arbitrary code.

It was discovered that c-ares incorrectly handled certain sortlist strings.
A remote attacker could use this issue to cause c-ares to crash, resulting
in a denial of service, or possibly execute arbitrary code.

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
22.10 kinetic libc-ares2 –  1.18.1-1ubuntu0.22.10.1
22.04 jammy libc-ares2 –  1.18.1-1ubuntu0.22.04.1
20.04 focal libc-ares2 –  1.15.0-1ubuntu0.2
18.04 bionic libc-ares2 –  1.14.0-1ubuntu0.2

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References

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