USN-6727-2: NSS regression
11 April 2024
USN-6727-1 introduced a regression in NSS.
Releases
Packages
- nss - Network Security Service library
Details
USN-6727-1 fixed vulnerabilities in NSS. The update introduced a regression
when trying to load security modules on Ubuntu 20.04 LTS and Ubuntu 22.04
LTS. This update fixes the problem.
We apologize for the inconvenience.
Original advisory details:
It was discovered that NSS incorrectly handled padding when checking PKCS#1
certificates. A remote attacker could possibly use this issue to perform
Bleichenbacher-like attacks and recover private data. This issue only
affected Ubuntu 20.04 LTS. (CVE-2023-4421)
It was discovered that NSS had a timing side-channel when performing RSA
decryption. A remote attacker could possibly use this issue to recover
private data. (CVE-2023-5388)
It was discovered that NSS had a timing side-channel when using certain
NIST curves. A remote attacker could possibly use this issue to recover
private data. (CVE-2023-6135)
The NSS package contained outdated CA certificates. This update refreshes
the NSS package to version 3.98 which includes the latest CA certificate
bundle and other security improvements.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 22.04
Ubuntu 20.04
In general, a standard system update will make all the necessary changes.