1. Ubuntu Security Notices
  2. USN-3163-1

USN-3163-1: NSS vulnerabilities

Publication date

4 January 2017

Overview

Several security issues were fixed in NSS.

Releases

Packages

  • 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...

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
the latest CA certificate bundle.

Update instructions

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.

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
16.10 yakkety libnss3 –  2:3.26.2-0ubuntu0.16.10.1
16.04 xenial libnss3 –  2:3.26.2-0ubuntu0.16.04.2
14.04 trusty libnss3 –  2:3.26.2-0ubuntu0.14.04.3
12.04 precise libnss3 –  2:3.26.2-0ubuntu0.12.04.1

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References

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