[USN-5168-3] NSS vulnerability
Leonidas S. Barbosa
leo.barbosa at canonical.com
Wed Dec 1 18:20:53 UTC 2021
Ubuntu Security Notice USN-5168-3
December 01, 2021
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM
NSS could be made to crash or run programs if it verified a specially
- nss: Network Security Service library
USN-5168-1 fixed a vulnerability in NSS. This update provides
the corresponding update for Ubuntu 14.04 ESM and Ubuntu 16.04 ESM.
Original advisory 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.
The problem can be corrected by updating your system to the following
Ubuntu 16.04 ESM:
Ubuntu 14.04 ESM:
After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.
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