Ubuntu 12.04 LTS / 14.04 LTS : gnutls26 vulnerability (USN-2821-1)

Low Nessus Plugin ID 87123


The remote Ubuntu host is missing a security-related patch.


It was discovered that GnuTLS incorrectly validated the first byte of padding in CBC modes. A remote attacker could possibly use this issue to perform a padding oracle attack.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.


Update the affected libgnutls26 package.

Plugin Details

Severity: Low

ID: 87123

File Name: ubuntu_USN-2821-1.nasl

Version: $Revision: 2.3 $

Type: local

Agent: unix

Published: 2015/12/01

Modified: 2016/05/24

Dependencies: 12634

Risk Information

Risk Factor: Low


Base Score: 2.6

Temporal Score: 1.9

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libgnutls26, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:14.04

Required KB Items: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

Exploit Available: false

Exploit Ease: No known exploits are available

Patch Publication Date: 2015/11/30

Reference Information

OSVDB: 131045

USN: 2821-1