USN-4060-1: NSS vulnerabilities
nss vulnerabilities
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 19.04
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
Summary
Several security issues were fixed in NSS.
Software Description
- nss – Network Security Service library
Details
Henry Corrigan-Gibbs discovered that NSS incorrectly handled importing
certain curve25519 private keys. An attacker could use this issue to cause
NSS to crash, resulting in a denial of service, or possibly obtain
sensitive information. (CVE-2019-11719)
Hubert Kario discovered that NSS incorrectly handled PKCS#1 v1.5 signatures
when using TLSv1.3. An attacker could possibly use this issue to trick NSS
into using PKCS#1 v1.5 signatures, contrary to expectations. This issue
only applied to Ubuntu 19.04. (CVE-2019-11727)
Jonas Allmann discovered that NSS incorrectly handled certain p256-ECDH
public keys. An attacker could possibly use this issue to cause NSS to
crash, resulting in a denial of service. (CVE-2019-11729)
Update instructions
The problem can be corrected by updating your system to the following package versions:
- Ubuntu 19.04
- libnss3 – 2:3.42-1ubuntu2.1
- Ubuntu 18.04 LTS
- libnss3 – 2:3.35-2ubuntu2.3
- Ubuntu 16.04 LTS
- libnss3 – 2:3.28.4-0ubuntu0.16.04.6
To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.
After a standard system update you need to restart any applications that
use NSS, such as Evolution, to make all the necessary changes.
References
Source: USN-4060-1: NSS vulnerabilities
