[USN-7477-1] c-ares vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-7477-1
May 05, 2025

c-ares vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.04
- Ubuntu 24.10

Summary:

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

Software Description:
- c-ares: library for asynchronous name resolution

Details:

It was discovered that c-ares incorrectly handled re-enqueuing certain
queries. A remote attacker could possibly use this issue to cause c-ares to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 25.04
   libcares2                       1.34.4-2.1ubuntu0.1

Ubuntu 24.10
   libcares2                       1.33.0-1ubuntu0.1

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

References:
   https://ubuntu.com/security/notices/USN-7477-1
   CVE-2025-31498

Package Information:
   https://launchpad.net/ubuntu/+source/c-ares/1.34.4-2.1ubuntu0.1
   https://launchpad.net/ubuntu/+source/c-ares/1.33.0-1ubuntu0.1

-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature.asc
Type: application/pgp-signature
Size: 840 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20250505/e9d31ba9/attachment.sig>