USN-5034-2: c-ares vulnerability
10 August 2021
c-ares could be made to return wrong domains.
- c-ares - library for asynchronous name resolution
USN-5034-1 fixed a vulnerability in c-ares. This update provides
the corresponding update for Ubuntu 16.04 ESM.
Original advisory details:
Philipp Jeitner and Haya Shulman discovered that c-ares incorrectly
validated certain hostnames returned by DNS servers. A remote attacker
could possibly use this issue to perform Domain Hijacking attacks.
- USN-5034-1: libc-ares-dev, libc-ares2, c-ares