Ubuntu 16.04 LTS: USN-3163-1 Moderate: NSS Denial of Service

ubuntu

January 4, 2017

Several security issues were fixed in NSS.

Summary

Several security issues were fixed in NSS.

Software Description:

- nss: Network Security Service library

Details:

It was discovered that NSS incorrectly handled certain invalid

Diffie-Hellman keys. A remote attacker could possibly use this flaw to

cause NSS to crash, resulting in a denial of service. This issue only

applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.

(CVE-2016-5285)

Hubert Kario discovered that NSS incorrectly handled Diffie Hellman client

key exchanges. A remote attacker could possibly use this flaw to perform a

small subgroup confinement attack and recover private keys. This issue only

applied to Ubuntu 12.04 LTS, Ubuntu 14.04 LTS and Ubuntu 16.04 LTS.

(CVE-2016-8635)

Franziskus Kiefer discovered that NSS incorrectly mitigated certain timing

side-channel attacks. A remote attacker could possibly use this flaw to

recover private keys. (CVE-2016-9074)

This update refreshes the NSS package to version 3.26.2 which includes

...

Read the Full Advisory

Topics Covered

security advisory moderate denial of service Ubuntu timing attack NSS key recovery

Update Instructions

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

Ubuntu 16.10:
  libnss3                         2:3.26.2-0ubuntu0.16.10.1

Ubuntu 16.04 LTS:
  libnss3                         2:3.26.2-0ubuntu0.16.04.2

Ubuntu 14.04 LTS:
  libnss3                         2:3.26.2-0ubuntu0.14.04.3

Ubuntu 12.04 LTS:
  libnss3                         2:3.26.2-0ubuntu0.12.04.1

This update uses a new upstream release, which includes additional bug
fixes. After a standard system update you need to restart any applications
that use NSS, such as Evolution and Chromium, to make all the necessary
changes.