{"id":"CVE-2019-14243","aliases":["EUVD-2022-3110","GHSA-85c5-ccm8-vr96","GO-2023-1923"],"status":"published","title":"mastercactapus proxyprotocol vulnerable to denial of service","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","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":"2026-11-09","score":0.04295,"percentile":0.91199,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2019-07-23T21:38:14Z","modified":"2026-10-24T10:51:21Z","fixes":[{"ecosystem":"Go","package":"github.com/mastercactapus/proxyprotocol","fixed_in":["0.0.2"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/mastercactapus/proxyprotocol","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"0.0.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mastercactapus/proxyprotocol","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.2"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/mastercactapus/proxyprotocol","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.0.2"}]}]}],"products":[{"vendor":"haproxy","product":"proxyprotocol"}],"references":[{"url":"https://caddy.community/t/dos-in-http-proxyprotocol-plugin/6014","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/mastercactapus/proxyprotocol/issues/1","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web","report"]},{"url":"https://github.com/mastercactapus/caddy-proxyprotocol/issues/8","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report","web"]},{"url":"https://github.com/mastercactapus/proxyprotocol/compare/ef496d7...5c4a101","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://github.com/mastercactapus/proxyprotocol/commit/5c4a101121fc3e868026189c7a73f7f19eef90ac","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","web"]},{"url":"https://github.com/mastercactapus/proxyprotocol/releases/tag/v0.0.2","tags":["x_refsource_MISC","x_transferred","Release Notes","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-14243","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-85c5-ccm8-vr96","tags":["advisory"]},{"url":"https://github.com/mastercactapus/proxyprotocol","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2019-14243","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2019-07-23T21:38:14Z","modified":"2024-08-05T00:12:43.432Z","updated_at":"2026-11-02T14:20:18.085548Z"}],"euvd":[{"id":"EUVD-2022-3110","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2019-07-23T21:38:14Z","modified":"2024-08-05T00:12:43Z","updated_at":"2026-11-03T02:40:40.053391Z"}],"ghsa":[{"id":"GHSA-85c5-ccm8-vr96","title":"mastercactapus proxyprotocol vulnerable to denial of service","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2022-05-24T16:51:05Z","modified":"2023-08-25T21:43:48Z","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-20"],"updated_at":"2026-11-02T14:37:00.680009Z"}],"nvd":[{"id":"CVE-2019-14243","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2019-07-23T22:15:11.643Z","modified":"2026-06-17T02:18:01.78Z","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"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:05:20.616405Z"}],"osv":[{"id":"CVE-2019-14243","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2019-07-23T22:15:11.643Z","modified":"2026-10-24T10:51:21.408128985Z","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":"2026-11-02T15:44:11.029493Z"},{"id":"GHSA-85c5-ccm8-vr96","title":"mastercactapus proxyprotocol vulnerable to denial of service","description":"headerv2.go in mastercactapus proxyprotocol before 0.0.2, as used in the mastercactapus caddy-proxyprotocol plugin through 0.0.2 for Caddy, allows remote attackers to cause a denial of service (webserver panic and daemon crash) via a crafted HAProxy PROXY v2 request with truncated source/destination address data.","status":"published","published":"2022-05-24T16:51:05Z","modified":"2023-11-08T04:01:09.525074Z","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-20"],"updated_at":"2026-11-02T15:46:41.732368Z"},{"id":"GO-2023-1923","title":"Panic when handling invalid HAProxy PROXY v2 request in github.com/mastercactapus/proxyprotocol","description":"Panic when handling invalid HAProxy PROXY v2 request in github.com/mastercactapus/proxyprotocol","status":"published","published":"2023-07-25T22:53:14Z","modified":"2024-05-20T16:03:47Z","updated_at":"2026-11-02T15:47:01.185262Z"}]}}