=========================================================================Ubuntu Security Notice USN-3850-2
February 18, 2019
nss vulnerabilities
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 12.04 ESM
Summary:
Several security issues were fixed in NSS.
Software Description:
- nss: Network Security Service library
Details:
USN-3850-1 fixed several vulnerabilities in NSS. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Keegan Ryan discovered that NSS incorrectly handled ECDSA key
generation. A local attacker could possibly use this issue to perform
a cache-timing attack and recover private ECDSA keys. (CVE-2018-0495)
It was discovered that NSS incorrectly handled certain v2-compatible
ClientHello messages. A remote attacker could possibly use this issue
to perform a replay attack. (CVE-2018-12384)
It was discovered that NSS incorrectly handled certain padding
oracles. A remote attacker could possibly use this issue to perform a
variant of the Bleichenbacher attack. (CVE-2018-12404)
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 12.04 ESM:
libnss3 2:3.28.4-0ubuntu0.12.04.2
After a standard system update you need to restart any applications
that use NSS, such as Evolution, to make all the necessary changes.
References:
https://ubuntu.com/security/notices/USN-3850-2
https://ubuntu.com/security/notices/USN-3850-1
CVE-2018-0495, CVE-2018-12384, CVE-2018-12404
