Ubuntu Security Notice USN-6727-2

Ubuntu Security Notice 6727-2 - 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. 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. It was discovered that NSS had a timing side-channel when performing …

attacker certificates fixes issue lts modules notice nss padding pkcs problem security security notice ubuntu ubuntu 20.04 ubuntu 22.04 update usn vulnerabilities