USN-3850-1: NSS vulnerabilities

9 January 2019

nss vulnerabilities

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

• Ubuntu 18.10
• Ubuntu 18.04 LTS
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary

Several security issues were fixed in NSS.

Software Description

• nss - Network Security Service library

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 18.10

libnss3 - 2:3.36.1-1ubuntu1.1

Ubuntu 18.04 LTS

libnss3 - 2:3.35-2ubuntu2.1

Ubuntu 16.04 LTS

libnss3 - 2:3.28.4-0ubuntu0.16.04.4

Ubuntu 14.04 LTS

libnss3 - 2:3.28.4-0ubuntu0.14.04.4

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

from Ubuntu Security Notices http://bit.ly/2ACtLzW