{"schemaVersion":3,"id":"USN-6438-2","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":".Net regressions\n\nUSN-6438-1 fixed vulnerabilities in .Net. It was discovered that the fix\nfor [CVE-2023-36799](https://ubuntu.com/security/CVE-2023-36799) was incomplete. This update fixes the problem.\n\nOriginal advisory details:\n\n Kevin Jones discovered that .NET did not properly process certain\n X.509 certificates. An attacker could possibly use this issue to\n cause a denial of service. (CVE-2023-36799)\n\n It was discovered that the .NET Kestrel web server did not properly\n handle HTTP/2 requests. A remote attacker could possibly use this\n issue to cause a denial of service. (CVE-2023-44487)","dates":{"published":"2023-10-25T03:44:47.079Z","modified":"2026-02-04T02:30:56.108Z","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":"dotnet6","name":"dotnet6","label":"dotnet6","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/dotnet6","purlType":"deb","versions":[{"text":"< 6.0.124-0ubuntu1~23.10.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 6.0.124-0ubuntu1~23.10.1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"dotnet7","name":"dotnet7","label":"dotnet7","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/dotnet7","purlType":"deb","versions":[{"text":"< 7.0.113-0ubuntu1~23.10.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 7.0.113-0ubuntu1~23.10.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-6438-2","label":"ubuntu.com/security/notices/USN-6438-2","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-36799","label":"ubuntu.com/security/CVE-2023-36799","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://launchpad.net/bugs/2040207","label":"launchpad.net/bugs/2040207","hostname":"launchpad.net","tags":["REPORT"]},{"url":"https://launchpad.net/bugs/2040208","label":"launchpad.net/bugs/2040208","hostname":"launchpad.net","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":["CVE-2023-36799"]},"timeline":[{"kind":"published","date":"2023-10-25T03:44:47.079Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T02:30:56.108Z","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":"2026-10-20T20:41:07.441Z","stale":false,"partial":false}}