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CVE-2021-41991

Published: 18 October 2021

The in-memory certificate cache in strongSwan before 5.9.4 has a remote integer overflow upon receiving many requests with different certificates to fill the cache and later trigger the replacement of cache entries. The code attempts to select a less-often-used cache entry by means of a random number generator, but this is not done correctly. Remote code execution might be a slight possibility.

Priority

Medium

CVSS 3 base score: 7.5

Status

Package Release Status
strongswan
Launchpad, Ubuntu, Debian
Upstream Needs triage

Ubuntu 21.10 (Impish Indri)
Released (5.9.1-1ubuntu3.1)
Ubuntu 21.04 (Hirsute Hippo)
Released (5.9.1-1ubuntu1.2)
Ubuntu 20.04 LTS (Focal Fossa)
Released (5.8.2-1ubuntu3.3)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (5.6.2-1ubuntu2.7)
Ubuntu 16.04 ESM (Xenial Xerus)
Released (5.3.5-1ubuntu3.8+esm1)
Ubuntu 14.04 ESM (Trusty Tahr)
Released (5.1.2-0ubuntu2.11+esm1)