{"id":"CVE-2023-36435","aliases":["ALPINE-CVE-2023-36435","BIT-dotnet-2023-36435","BIT-dotnet-sdk-2023-36435","EUVD-2023-2731","GHSA-fr44-546p-7xcp"],"status":"published","title":"Microsoft QUIC Denial of Service Vulnerability","description":"Microsoft QUIC Denial of Service Vulnerability","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.05718,"percentile":0.9313,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400","CWE-401"],"published":"2023-10-10T17:08:03Z","modified":"2026-11-03T06:32:42Z","fixes":[{"ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.OpenSSL","fixed_in":["2.2.3"],"sources":["ghsa","osv"]},{"ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.Schannel","fixed_in":["2.2.3"],"sources":["ghsa","osv"]},{"ecosystem":"Alpine:v3.18","package":"dotnet7-build","fixed_in":["7.0.112-r0","7.0.113-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"dotnet7-build","fixed_in":["7.0.112-r0","7.0.113-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"dotnet7-runtime","fixed_in":["7.0.12-r0","7.0.13-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"dotnet7-runtime","fixed_in":["7.0.12-r0","7.0.13-r0"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"dotnet","fixed_in":["7.0.13"],"sources":["osv"]},{"ecosystem":"Bitnami","package":"dotnet-sdk","fixed_in":["7.0.13"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.OpenSSL","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3"}]}]},{"source":"ghsa","ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.Schannel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"dotnet7-build","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.112-r0"},{"fixed":"7.0.113-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"dotnet7-build","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.112-r0"},{"fixed":"7.0.113-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.18","package":"dotnet7-runtime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.12-r0"},{"fixed":"7.0.13-r0"}]}]},{"source":"osv","ecosystem":"Alpine:v3.19","package":"dotnet7-runtime","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.0.12-r0"},{"fixed":"7.0.13-r0"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"dotnet","ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.0.13"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"dotnet-sdk","ranges":[{"type":"SEMVER","events":[{"introduced":"7.0.0"},{"fixed":"7.0.13"}]}]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.OpenSSL","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3"}]}],"versions":["1.8.0"]},{"source":"osv","ecosystem":"NuGet","package":"Microsoft.Native.Quic.MsQuic.Schannel","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.3"}]}],"versions":["1.8.0"]}],"products":[{"vendor":"microsoft","product":".net"},{"vendor":"microsoft","product":".net 7.0"},{"vendor":"microsoft","product":"powershell 7.3"},{"vendor":"microsoft","product":"windows 11 version 21h2"},{"vendor":"microsoft","product":"windows 11 version 22h2"},{"vendor":"microsoft","product":"windows server 2022"},{"vendor":"microsoft","product":"windows_11_21h2"},{"vendor":"microsoft","product":"windows_11_22h2"},{"vendor":"microsoft","product":"windows_server_2022"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36435","tags":["vendor-advisory","x_transferred","Patch","Vendor Advisory","advisory","fix","web"]},{"url":"https://github.com/microsoft/msquic/security/advisories/GHSA-fr44-546p-7xcp","tags":["web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-36435","tags":["web","advisory"]},{"url":"https://github.com/microsoft/msquic/commit/d364feeda0dd8b729eca6fef149c1ef98630f0cb","tags":["web"]},{"url":"https://github.com/advisories/GHSA-fr44-546p-7xcp"},{"url":"https://security.alpinelinux.org/vuln/CVE-2023-36435","tags":["advisory"]},{"url":"https://github.com/microsoft/msquic","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2023-36435","title":"Microsoft QUIC Denial of Service Vulnerability","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2023-10-10T17:08:03.619Z","modified":"2025-04-14T22:46:35.445Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:35:28.218693Z"}],"euvd":[{"id":"EUVD-2023-2731","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2023-10-10T17:08:03Z","modified":"2025-04-14T22:46:35Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T20:52:32.064592Z"}],"ghsa":[{"id":"GHSA-fr44-546p-7xcp","title":"MsQuic Remote Denial of Service Vulnerability","description":"### Impact\nThe MsQuic server will continue to leak memory until no more is available, resulting in a denial of service.\n\n### Patches\nThe following patch was made:\n\n- Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/d364feeda0dd8b729eca6fef149c1ef98630f0cb\n\n### Workarounds\nBeyond upgrading to the patched versions, there is no other workaround.\n","status":"published","published":"2023-10-10T22:23:28Z","modified":"2024-06-03T18:31:16Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-401"],"updated_at":"2026-11-02T14:37:53.025064Z"}],"nvd":[{"id":"CVE-2023-36435","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2023-10-10T18:15:12.68Z","modified":"2026-06-17T06:06:17.11Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-400"],"updated_at":"2026-11-02T14:08:36.656095Z"}],"osv":[{"id":"ALPINE-CVE-2023-36435","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2023-10-10T18:15:12.68Z","modified":"2026-11-03T06:32:42.968218864Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T07:17:02.90744Z"},{"id":"CVE-2023-36435","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2023-10-10T18:15:12.68Z","modified":"2026-10-24T10:30:57.409318314Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:32.510144Z"},{"id":"GHSA-fr44-546p-7xcp","title":"MsQuic Remote Denial of Service Vulnerability","description":"### Impact\nThe MsQuic server will continue to leak memory until no more is available, resulting in a denial of service.\n\n### Patches\nThe following patch was made:\n\n- Fix Memory Leak from Multiple Decodes of TP - https://github.com/microsoft/msquic/commit/d364feeda0dd8b729eca6fef149c1ef98630f0cb\n\n### Workarounds\nBeyond upgrading to the patched versions, there is no other workaround.\n","status":"published","published":"2023-10-10T22:23:28Z","modified":"2024-06-03T18:49:04.265783Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-400","CWE-401"],"updated_at":"2026-11-02T15:46:46.760785Z"},{"id":"BIT-dotnet-2023-36435","title":"Microsoft QUIC Denial of Service Vulnerability","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2024-03-06T10:54:00.604Z","modified":"2026-09-08T08:46:47.497948833Z","updated_at":"2026-11-02T15:28:29.152062Z"},{"id":"BIT-dotnet-sdk-2023-36435","title":"Microsoft QUIC Denial of Service Vulnerability","description":"Microsoft QUIC Denial of Service Vulnerability","status":"published","published":"2024-03-06T10:54:02.077Z","modified":"2026-09-08T08:46:27.288228768Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}