USN-4397-1: NSS vulnerabilities
nss vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
- Ubuntu 19.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in NSS.
Software Description
- nss – Network Security Service library
Details
It was discovered that NSS incorrectly handled the TLS State Machine. A
remote attacker could possibly use this issue to cause NSS to hang,
resulting in a denial of service. This issue only affected Ubuntu 18.04 LTS
and Ubuntu 19.10. (CVE-2019-17023)
Cesar Pereida Garcia discovered that NSS incorrectly handled DSA key
generation. A local attacker could possibly use this issue to perform a
timing attack and recover DSA keys. (CVE-2020-12399)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 20.04 LTS
- libnss3 – 2:3.49.1-1ubuntu1.1
- Ubuntu 19.10
- libnss3 – 2:3.45-1ubuntu2.3
- Ubuntu 18.04 LTS
- libnss3 – 2:3.35-2ubuntu2.8
- Ubuntu 16.04 LTS
- libnss3 – 2:3.28.4-0ubuntu0.16.04.11
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to reboot your computer to make
all the necessary changes.
References
Source: USN-4397-1: NSS vulnerabilities
