[USN-4417-2] NSS vulnerability

Leonidas S. Barbosa leo.barbosa at canonical.com
Mon Jul 6 20:15:14 UTC 2020

Ubuntu Security Notice USN-4417-2
July 06, 2020

nss vulnerability

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

- Ubuntu 14.04 ESM
- Ubuntu 12.04 ESM


NSS could be made to expose sensitive information.

Software Description:
- nss: Network Security Service library


USN-4417-1 fixed a vulnerability in NSS. This update provides
the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM.

Original advisory details:

 Cesar Pereida, Billy Bob Brumley, Yuval Yarom, and Nicola Tuveri discovered
 that NSS incorrectly handled RSA key generation. A local attacker could
 possibly use this issue to perform a timing attack and recover RSA keys.

Update instructions:

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

Ubuntu 14.04 ESM:
  libnss3                         2:3.28.4-0ubuntu0.14.04.5+esm6

Ubuntu 12.04 ESM:
  libnss3                         2:3.28.4-0ubuntu0.12.04.9

After a standard system update you need to reboot your computer to make
all the necessary changes.

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