{"schemaVersion":3,"id":"USN-6138-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"libssh vulnerabilities\n\nPhilip Turnbull discovered that libssh incorrectly handled rekeying with\nalgorithm guessing. A remote attacker could use this issue to cause libssh\nto crash, resulting in a denial of service, or possibly execute arbitrary\ncode. (CVE-2023-1667)\n\nKevin Backhouse discovered that libssh incorrectly handled verifying data\nsignatures. A remote attacker could possibly use this issue to bypass\nauthorization. (CVE-2023-2283)","dates":{"published":"2023-06-05T14:08:01.000Z","modified":"2026-04-22T10:36:32.463Z","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":"libssh","name":"libssh","label":"libssh","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/libssh","purlType":"deb","versions":[{"text":"< 0.9.3-2ubuntu2.3","noFixRecorded":false,"fixedIn":null},{"text":"< 0.9.6-2ubuntu0.22.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 0.9.3-2ubuntu2.3 | < 0.9.6-2ubuntu0.22.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6138-1","label":"ubuntu.com/security/notices/USN-6138-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-1667","label":"ubuntu.com/security/CVE-2023-1667","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2023-2283","label":"ubuntu.com/security/CVE-2023-2283","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2023-1667","CVE-2023-2283"],"downstream":[],"duplicates":[],"related":["CVE-2023-1667","CVE-2023-2283"]},"timeline":[{"kind":"published","date":"2023-06-05T14:08:01.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:36:32.463Z","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":"2026-10-19T15:49:54.604Z","stale":false,"partial":false}}