{"schemaVersion":3,"id":"USN-6727-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"nss vulnerabilities\n\nIt was discovered that NSS incorrectly handled padding when checking PKCS#1\ncertificates. A remote attacker could possibly use this issue to perform\nBleichenbacher-like attacks and recover private data. This issue only\naffected Ubuntu 20.04 LTS. (CVE-2023-4421)\n\nIt was discovered that NSS had a timing side-channel when performing RSA\ndecryption. A remote attacker could possibly use this issue to recover\nprivate data. (CVE-2023-5388)\n\nIt was discovered that NSS had a timing side-channel when using certain\nNIST curves. A remote attacker could possibly use this issue to recover\nprivate data. (CVE-2023-6135)\n\nThe NSS package contained outdated CA certificates. This update refreshes\nthe NSS package to version 3.98 which includes the latest CA certificate\nbundle and other security improvements.","dates":{"published":"2024-04-10T13:40:08.000Z","modified":"2026-04-27T17:12:02.385Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"ubuntu","product":"nss","name":"nss","label":"nss","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/nss","purlType":"deb","versions":[{"text":"< 2:3.98-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 2:3.98-0ubuntu0.22.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 2:3.98-0ubuntu0.20.04.1 | < 2:3.98-0ubuntu0.22.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6727-1","label":"ubuntu.com/security/notices/USN-6727-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-4421","label":"ubuntu.com/security/CVE-2023-4421","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-5388","label":"ubuntu.com/security/CVE-2023-5388","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-6135","label":"ubuntu.com/security/CVE-2023-6135","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2023-4421","CVE-2023-5388","CVE-2023-6135"],"downstream":[],"duplicates":[],"related":["CVE-2023-4421","CVE-2023-5388","CVE-2023-6135"]},"timeline":[{"kind":"published","date":"2024-04-10T13:40:08.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T17:12:02.385Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-19T21:30:39.957Z","stale":false,"partial":false}}