Ubuntu 12.04 LTS / 14.04 LTS / 15.10 / 16.04 LTS : nss vulnerability (USN-3029-1)

High Nessus Plugin ID 92010


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


Tyson Smith and Jed Davis discovered that NSS incorrectly handled memory. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.

This update refreshes the NSS package to version 3.23 which includes the latest CA certificate bundle. As a security improvement, this update also modifies NSS behaviour to reject DH key sizes below 1024 bits, preventing a possible downgrade 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 libnss3 package.

Plugin Details

Severity: High

ID: 92010

File Name: ubuntu_USN-3029-1.nasl

Version: $Revision: 2.5 $

Type: local

Agent: unix

Published: 2016/07/12

Modified: 2016/10/14

Dependencies: 12634

Risk Information

Risk Factor: High


Base Score: 9.3

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


Base Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:libnss3, cpe:/o:canonical:ubuntu_linux:12.04:-:lts, cpe:/o:canonical:ubuntu_linux:14.04, cpe:/o:canonical:ubuntu_linux:15.10, cpe:/o:canonical:ubuntu_linux:16.04

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

Patch Publication Date: 2016/07/11

Reference Information

CVE: CVE-2016-2834

USN: 3029-1