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The NSS package contained outdated CA certificates.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.
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