USN-2540-1: GnuTLS vulnerabilities
23 March 2015
Several security issues were fixed in GnuTLS.
It was discovered that GnuTLS did not perform date and time checks on
CA certificates, contrary to expectations. This issue only affected
Ubuntu 10.04 LTS. (CVE-2014-8155)
Nikos Mavrogiannopoulos discovered that GnuTLS incorrectly verified that
signature algorithms matched. A remote attacker could possibly use this
issue to downgrade to a disallowed algorithm. This issue only affected
Ubuntu 10.04 LTS, Ubuntu 12.04 LTS and Ubuntu 14.04 LTS. (CVE-2015-0282)
It was discovered that GnuTLS incorrectly verified certificate algorithms.
A remote attacker could possibly use this issue to downgrade to a
disallowed algorithm. (CVE-2015-0294)
The problem can be corrected by updating your system to the following package versions:
In general, a standard system update will make all the necessary changes.