{"id":"USN-6727-2","aliases":[],"status":"published","title":"nss regression","description":"USN-6727-1 fixed vulnerabilities in NSS. The update introduced a regression\nwhen trying to load security modules on Ubuntu 20.04 LTS and Ubuntu 22.04\nLTS. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that NSS incorrectly handled padding when checking PKCS#1\n certificates. A remote attacker could possibly use this issue to perform\n Bleichenbacher-like attacks and recover private data. This issue only\n affected Ubuntu 20.04 LTS. (CVE-2023-4421)\n \n It was discovered that NSS had a timing side-channel when performing RSA\n decryption. A remote attacker could possibly use this issue to recover\n private data. (CVE-2023-5388)\n \n It was discovered that NSS had a timing side-channel when using certain\n NIST curves. A remote attacker could possibly use this issue to recover\n private data. (CVE-2023-6135)\n \n The NSS package contained outdated CA certificates. This update refreshes\n the NSS package to version 3.98 which includes the latest CA certificate\n bundle and other security improvements.","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2024-04-11T18:18:01Z","modified":"2026-04-22T10:46:26Z","fixes":[{"ecosystem":"Ubuntu:20.04:LTS","package":"nss","fixed_in":["2:3.98-0ubuntu0.20.04.2"],"sources":["osv"]},{"ecosystem":"Ubuntu:22.04:LTS","package":"nss","fixed_in":["2:3.98-0ubuntu0.22.04.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.20.04.2"}]}],"versions":["2:3.45-1ubuntu2","2:3.47-1ubuntu1","2:3.47-1ubuntu2","2:3.48-1ubuntu1","2:3.49.1-1ubuntu1","2:3.49.1-1ubuntu1.1","2:3.49.1-1ubuntu1.2","2:3.49.1-1ubuntu1.4","2:3.49.1-1ubuntu1.5","2:3.49.1-1ubuntu1.6","2:3.49.1-1ubuntu1.7","2:3.49.1-1ubuntu1.8","2:3.49.1-1ubuntu1.9","2:3.98-0ubuntu0.20.04.1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"nss","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:3.98-0ubuntu0.22.04.2"}]}],"versions":["2:3.68-1ubuntu1","2:3.68-1ubuntu2","2:3.68.2-0ubuntu1","2:3.68.2-0ubuntu1.1","2:3.68.2-0ubuntu1.2","2:3.98-0ubuntu0.22.04.1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-6727-2","tags":["advisory"]},{"url":"https://launchpad.net/bugs/2060906","tags":["report"]}],"sources":{"osv":[{"id":"USN-6727-2","title":"nss regression","description":"USN-6727-1 fixed vulnerabilities in NSS. The update introduced a regression\nwhen trying to load security modules on Ubuntu 20.04 LTS and Ubuntu 22.04\nLTS. This update fixes the problem.\n\nWe apologize for the inconvenience.\n\nOriginal advisory details:\n\n It was discovered that NSS incorrectly handled padding when checking PKCS#1\n certificates. A remote attacker could possibly use this issue to perform\n Bleichenbacher-like attacks and recover private data. This issue only\n affected Ubuntu 20.04 LTS. (CVE-2023-4421)\n \n It was discovered that NSS had a timing side-channel when performing RSA\n decryption. A remote attacker could possibly use this issue to recover\n private data. (CVE-2023-5388)\n \n It was discovered that NSS had a timing side-channel when using certain\n NIST curves. A remote attacker could possibly use this issue to recover\n private data. (CVE-2023-6135)\n \n The NSS package contained outdated CA certificates. This update refreshes\n the NSS package to version 3.98 which includes the latest CA certificate\n bundle and other security improvements.\n","status":"published","published":"2024-04-11T18:18:01Z","modified":"2026-04-22T10:46:26.278487Z","updated_at":"2026-11-02T16:58:17.914523Z"}]}}