USN-3318-1: GnuTLS vulnerabilities

Releases

• Ubuntu 17.04
• Ubuntu 16.10
• Ubuntu 16.04 ESM
• Ubuntu 14.04 ESM

Packages

• gnutls26 - GNU TLS library
• gnutls28 - GNU TLS library

Details

Hubert Kario discovered that GnuTLS incorrectly handled decoding a status
response TLS extension. A remote attacker could possibly use this issue to
cause GnuTLS to crash, resulting in a denial of service. This issue only
applied to Ubuntu 16.04 LTS, Ubuntu 16.10 and Ubuntu 17.04. (CVE-2017-7507)

It was discovered that GnuTLS incorrectly handled decoding certain OpenPGP
certificates. A remote attacker could use this issue to cause GnuTLS to
crash, resulting in a denial of service, or possibly execute arbitrary
code. (CVE-2017-7869)

Update instructions

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

Ubuntu 17.04

• libgnutls30 - 3.5.6-4ubuntu4.1

Ubuntu 16.10

• libgnutls30 - 3.5.3-5ubuntu1.2

Ubuntu 16.04

• libgnutls30 - 3.4.10-4ubuntu1.3

Ubuntu 14.04

• libgnutls26 - 2.12.23-12ubuntu2.8

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

References

• CVE-2017-7507
• CVE-2017-7869