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Ubuntu Security Notice USN-4417-2

Ubuntu Security Notice USN-4417-2
Posted Jul 6, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4417-2 - USN-4417-1 fixed a vulnerability in NSS. This update provides the corresponding update for Ubuntu 12.04 ESM and Ubuntu 14.04 ESM. 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. Various other issues were also addressed.

tags | advisory, local
systems | linux, ubuntu
advisories | CVE-2020-12402
MD5 | 6beff0f6338dd54f6fb90b69d9a0df10

Ubuntu Security Notice USN-4417-2

Change Mirror Download
=========================================================================
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

Summary:

NSS could be made to expose sensitive information.

Software Description:
- nss: Network Security Service library

Details:

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.

References:
https://usn.ubuntu.com/4417-2
https://usn.ubuntu.com/4417-1
CVE-2020-12402
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