{"id":"CVE-2023-43669","aliases":["DEBIAN-CVE-2023-43669","EUVD-2023-2481","GHSA-9mcr-873m-xcxp","RUSTSEC-2023-0065","UBUNTU-CVE-2023-43669"],"status":"published","title":"Tungstenite allows remote attackers to cause a denial of service","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","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","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.02057,"percentile":0.81555,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-400"],"published":"2023-09-21T00:00:00Z","modified":"2026-10-28T02:31:06Z","fixes":[{"ecosystem":"crates.io","package":"tungstenite","fixed_in":["0.20.1"],"sources":["ghsa","osv"]},{"ecosystem":"Debian:13","package":"rust-tungstenite","fixed_in":["0.20.1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"rust-tungstenite","fixed_in":["0.20.1-1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"crates.io","package":"tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"0.20.0"},{"fixed":"0.20.1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20.1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.20.1-1"}]}]},{"source":"osv","ecosystem":"crates.io","package":"tungstenite","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.20.1"}]}]},{"source":"osv","ecosystem":"crates.io","package":"tungstenite","ranges":[{"type":"SEMVER","events":[{"introduced":"0.0.0-0"},{"fixed":"0.20.1"}]}]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.20.1-1","0.20.1-2"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.0-3","0.24.0-4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.28.0-1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"rust-tungstenite","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.24.0-4","0.24.0-5","0.28.0-1"]}],"products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"snapview","product":"tungstenite"}],"references":[{"url":"https://github.com/snapview/tungstenite-rs/issues/376","tags":["x_transferred","Exploit","Issue Tracking","report","web"]},{"url":"https://cwe.mitre.org/data/definitions/407.html","tags":["x_transferred","Technical Description","web","report"]},{"url":"https://crates.io/crates/tungstenite/versions","tags":["x_transferred","Release Notes","web","report"]},{"url":"https://github.com/snapview/tungstenite-rs/commit/8b3ecd3cc0008145ab4bc8d0657c39d09db8c7e2","tags":["x_transferred","Patch","fix","web","report"]},{"url":"https://github.com/advisories/GHSA-9mcr-873m-xcxp","tags":["x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://github.com/github/advisory-database/pull/2752","tags":["x_transferred","Patch","fix","web","report"]},{"url":"https://bugzilla.suse.com/show_bug.cgi?id=1215563","tags":["x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2240110","tags":["x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-43669","tags":["x_transferred","Third Party Advisory","web","advisory","report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK/","tags":["vendor-advisory","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D/","tags":["vendor-advisory","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM/","tags":["vendor-advisory","x_transferred","Mailing List","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-43669","tags":["advisory"]},{"url":"https://github.com/snapview/tungstenite-rs/pull/379","tags":["web"]},{"url":"https://rustsec.org/advisories/RUSTSEC-2023-0065.html","tags":["web","advisory"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK","tags":["web"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/43xxx/CVE-2023-43669.json","tags":["advisory"]},{"url":"https://github.com/snapview/tungstenite-rs","tags":["package"]},{"url":"https://crates.io/crates/tungstenite","tags":["package"]},{"url":"https://ubuntu.com/security/CVE-2023-43669","tags":["report"]},{"url":"https://github.com/snapview/tungstenite-rs/commit/f916b332a97f78f4d54d942b9e008a1af57ff938","tags":["report"]},{"url":"https://github.com/snapview/tungstenite-rs/commit/2e5029284b8bef3e59df0c9d3920c0ed6c7da7a9","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/THK6G6CD4VW6RCROWUV2C4HSINKK3XAK/","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R77EUWPZVP5WSMNXUXUDNHR7G7OI5NGM/","tags":["report"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TT7SF6CQ5VHAGFLWNXY64NFSW4WIWE7D/","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-43669","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-43669","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T00:00:00Z","modified":"2024-08-02T19:44:43.829Z","updated_at":"2026-11-02T14:35:14.633899Z"}],"euvd":[{"id":"EUVD-2023-2481","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T00:00:00Z","modified":"2024-08-02T19:44:43Z","updated_at":"2026-11-03T03:50:00.127967Z"}],"ghsa":[{"id":"GHSA-9mcr-873m-xcxp","title":"Tungstenite allows remote attackers to cause a denial of service","description":"The Tungstenite crate through 0.20.0 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T06:30:25Z","modified":"2024-02-16T22:38:40Z","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"],"updated_at":"2026-11-02T14:37:38.20753Z"}],"nvd":[{"id":"CVE-2023-43669","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T06:15:13.833Z","modified":"2026-06-17T06:26:11.99Z","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":"primary"}],"updated_at":"2026-11-02T14:08:29.595868Z"}],"osv":[{"id":"DEBIAN-CVE-2023-43669","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T06:15:13.833Z","modified":"2026-10-26T18:01:43.122176776Z","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":"2026-11-02T15:45:40.275853Z"},{"id":"GHSA-9mcr-873m-xcxp","title":"Tungstenite allows remote attackers to cause a denial of service","description":"The Tungstenite crate through 0.20.0 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T06:30:25Z","modified":"2026-09-10T03:49:58.067916445Z","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"],"updated_at":"2026-11-02T15:46:43.875515Z"},{"id":"RUSTSEC-2023-0065","title":"Tungstenite allows remote attackers to cause a denial of service","description":"The Tungstenite crate through 0.20.0 for Rust allows remote attackers to cause\na denial of service (minutes of CPU consumption) via an excessive length of an\nHTTP header in a client handshake. The length affects both how many times a parse\nis attempted (e.g., thousands of times) and the average amount of data for each\nparse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-25T12:00:00Z","modified":"2023-11-08T04:13:32.776663Z","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":"2026-11-02T15:53:39.971022Z"},{"id":"UBUNTU-CVE-2023-43669","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T06:15:00Z","modified":"2026-10-17T12:56:26.158211266Z","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":"2026-11-02T16:54:22.741943Z"},{"id":"CVE-2023-43669","description":"The Tungstenite crate before 0.20.1 for Rust allows remote attackers to cause a denial of service (minutes of CPU consumption) via an excessive length of an HTTP header in a client handshake. The length affects both how many times a parse is attempted (e.g., thousands of times) and the average amount of data for each parse attempt (e.g., millions of bytes).","status":"published","published":"2023-09-21T00:00:00Z","modified":"2026-10-28T02:31:06.5779746Z","updated_at":"2026-11-02T15:44:33.792101Z"}]}}