CVE-2024-25629

Publication date 23 February 2024

Last updated 24 July 2024

Ubuntu priority

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.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
c-ares	23.10 mantic	Fixed 1.19.1-3ubuntu0.1
	22.04 LTS jammy	Fixed 1.18.1-1ubuntu0.22.04.3
	20.04 LTS focal	Fixed 1.15.0-1ubuntu0.5
	18.04 LTS bionic	Fixed 1.14.0-1ubuntu0.2+esm2 Ubuntu Pro
	16.04 LTS xenial	Fixed 1.10.0-3ubuntu0.2+esm3 Ubuntu Pro
	14.04 LTS trusty	Ignored

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
c-ares	Upstream: a804c04

References

Related Ubuntu Security Notices (USN)