[USN-5168-1] NSS vulnerability

========================================================================== Ubuntu Security Notice USN-5168-1 December 01, 2021
nss vulnerability ==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 21.10 – Ubuntu 21.04 – Ubuntu 20.04 LTS – Ubuntu 18.04 LTS
Summary:
NSS could be made to crash or run programs if it verified a specially crafted signature.
Software Description: – nss: Network Security Service library
Details:
Tavis Ormandy discovered that NSS incorrectly handled verifying DSA/RSA-PSS signatures. A remote attacker could use this issue to cause NSS to crash, resulting in a denial of service, or possibly execute arbitrary code.
Update instructions:
The problem can be corrected by updating your system to the following package versions:
Ubuntu 21.10: libnss3 2:3.68-1ubuntu1.1
Ubuntu 21.04: libnss3 2:3.61-1ubuntu2.1
Ubuntu 20.04 LTS: libnss3 2:3.49.1-1ubuntu1.6
Ubuntu 18.04 LTS: libnss3 2:3.35-2ubuntu2.13
After a standard system update you need to restart any applications that use NSS, such as Evolution, to make all the necessary changes.
References: ubuntu.com/security/notices/USN-5168-1 CVE-2021-43527
Package Information: launchpad.net/ubuntu/+source/nss/2:3.68-1ubuntu1.1 launchpad.net/ubuntu/+source/nss/2:3.61-1ubuntu2.1 launchpad.net/ubuntu/+source/nss/2:3.49.1-1ubuntu1.6 launchpad.net/ubuntu/+source/nss/2:3.35-2ubuntu2.13