USN-3850-2: NSS vulnerabilities

18 February 2019

nss vulnerabilities

A security issue affects these releases of Ubuntu and its derivatives:

  • Ubuntu 12.04 ESM

Summary

Several security issues were fixed in NSS.

Software Description

  • nss - Network Security Service library

Details

USN-3850-1 fixed several vulnerabilities in NSS. This update provides the corresponding update for Ubuntu 12.04 ESM.

Original advisory details:

Keegan Ryan discovered that NSS incorrectly handled ECDSA key generation. A local attacker could possibly use this issue to perform a cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)

It was discovered that NSS incorrectly handled certain v2-compatible ClientHello messages. A remote attacker could possibly use this issue to perform a replay attack. (CVE-2018-12384)

It was discovered that NSS incorrectly handled certain padding oracles. A remote attacker could possibly use this issue to perform a variant of the Bleichenbacher attack. (CVE-2018-12404)

Update instructions

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

Ubuntu 12.04 ESM
libnss3 - 2:3.28.4-0ubuntu0.12.04.2

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to restart any applications that use NSS, such as Evolution, to make all the necessary changes.

References