USN-2540-1: GnuTLS vulnerabilities

Packages

gnutls26 - GNU TLS library
gnutls28 - GNU TLS library

Details

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)

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)

Update instructions

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

Learn more about how to get the fixes.

Ubuntu Release	Package Version
14.10 utopic	libgnutls-deb0-28 – 3.2.16-1ubuntu2.2
14.04 trusty	libgnutls26 – 2.12.23-12ubuntu2.2
12.04 precise	libgnutls26 – 2.12.14-5ubuntu3.9
10.04 lucid	libgnutls26 – 2.8.5-2ubuntu0.7

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References