{"id":"USN-6438-2","aliases":[],"status":"published","title":".Net regressions","description":"USN-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)","facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-10-25T03:44:47.079002Z","modified":"2026-02-04T02:30:56Z","fixes":[{"ecosystem":"Ubuntu:23.10","package":"dotnet6","fixed_in":["6.0.124-0ubuntu1~23.10.1"],"sources":["osv"]},{"ecosystem":"Ubuntu:23.10","package":"dotnet7","fixed_in":["7.0.113-0ubuntu1~23.10.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Ubuntu:23.10","package":"dotnet6","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.124-0ubuntu1~23.10.1"}]}],"versions":["6.0.116-0ubuntu2","6.0.116-0ubuntu3","6.0.118-0ubuntu1","6.0.119-0ubuntu1","6.0.120-0ubuntu1","6.0.120-0ubuntu2","6.0.121-0ubuntu1","6.0.123-0ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:23.10","package":"dotnet7","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.113-0ubuntu1~23.10.1"}]}],"versions":["7.0.105-0ubuntu2","7.0.105-0ubuntu3","7.0.107-0ubuntu1","7.0.108-0ubuntu2","7.0.109-0ubuntu1","7.0.109-0ubuntu2","7.0.110-0ubuntu1","7.0.112-0ubuntu1"]}],"references":[{"url":"https://ubuntu.com/security/notices/USN-6438-2","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-36799","tags":["report"]},{"url":"https://launchpad.net/bugs/2040207","tags":["report"]},{"url":"https://launchpad.net/bugs/2040208","tags":["report"]}],"sources":{"osv":[{"id":"USN-6438-2","title":".Net regressions","description":"USN-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)\n","status":"published","published":"2023-10-25T03:44:47.079002Z","modified":"2026-02-04T02:30:56.108338Z","updated_at":"2026-11-02T16:58:17.305935Z"}]}}