{"id":"UBUNTU-CVE-2021-23409","details":"The package github.com/pires/go-proxyproto before 0.6.0 are vulnerable to Denial of Service (DoS) via creating connections without the proxy protocol header.","modified":"2025-09-08T16:46:59Z","published":"2021-07-21T07:15:00Z","upstream":["CVE-2021-23409"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2021-23409"},{"type":"REPORT","url":"https://github.com/pires/go-proxyproto/issues/65"},{"type":"REPORT","url":"https://snyk.io/vuln/SNYK-GOLANG-GITHUBCOMPIRESGOPROXYPROTO-1316439"},{"type":"REPORT","url":"https://github.com/pires/go-proxyproto/pull/74"},{"type":"REPORT","url":"https://github.com/pires/go-proxyproto/pull/74/commits/cdc63867da24fc609b727231f682670d0d1cd346"},{"type":"REPORT","url":"https://github.com/pires/go-proxyproto/releases/tag/v0.6.0"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2021-23409"}],"affected":[{"package":{"name":"golang-github-pires-go-proxyproto","ecosystem":"Ubuntu:22.04:LTS","purl":"pkg:deb/ubuntu/golang-github-pires-go-proxyproto@0.4.2-1?arch=source&distro=jammy"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["0.4.2-1"],"ecosystem_specific":{"binaries":[{"binary_name":"golang-github-pires-go-proxyproto-dev","binary_version":"0.4.2-1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2021/UBUNTU-CVE-2021-23409.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},{"type":"Ubuntu","score":"medium"}]}