USN-1752-1: GnuTLS vulnerability

Releases

• Ubuntu 12.10
• Ubuntu 12.04
• Ubuntu 11.10
• Ubuntu 10.04
• Ubuntu 8.04

Packages

• gnutls13 - GNU TLS library
• gnutls26 - GNU TLS library

Details

Nadhem Alfardan and Kenny Paterson discovered that the TLS protocol as used
in GnuTLS was vulnerable to a timing side-channel attack known as the
"Lucky Thirteen" issue. A remote attacker could use this issue to perform
plaintext-recovery attacks via analysis of timing data.

Update instructions

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

Ubuntu 8.04

• libgnutls13 - 2.0.4-1ubuntu2.9

Ubuntu 12.10

• libgnutls26 - 2.12.14-5ubuntu4.2

Ubuntu 12.04

• libgnutls26 - 2.12.14-5ubuntu3.2

Ubuntu 11.10

• libgnutls26 - 2.10.5-1ubuntu3.3

Ubuntu 10.04

• libgnutls26 - 2.8.5-2ubuntu0.3

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

References

• CVE-2013-1619