{"id":"CVE-2021-44224","details":"A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy declarations, can allow for requests to be directed to a declared Unix Domain Socket endpoint (Server Side Request Forgery). This issue affects Apache HTTP Server 2.4.7 up to 2.4.51 (included).","aliases":["BIT-apache-2021-44224"],"modified":"2026-04-10T04:41:17.966303Z","published":"2021-12-20T12:15:07.393Z","related":["ALSA-2022:1915","MGASA-2021-0577","SUSE-SU-2022:0065-1","SUSE-SU-2022:0091-1","SUSE-SU-2022:0091-2","SUSE-SU-2022:0119-1","SUSE-SU-2022:0440-1","openSUSE-SU-2022:0091-1","openSUSE-SU-2024:11695-1"],"references":[{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BFSWOH4X77CV7AH7C4RMHUBDWKQDL4YH/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/"},{"type":"WEB","url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2022-01"},{"type":"ADVISORY","url":"http://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/202208-20"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213255"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213256"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/May/33"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211224-0001/"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2022-03"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/May/35"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/May/38"},{"type":"ADVISORY","url":"http://www.openwall.com/lists/oss-security/2021/12/20/3"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213257"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5035"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/httpd","events":[{"introduced":"f2b561181dbd0c689fd583c60878ce05854ec5f9"},{"fixed":"fed3b8a079835cd63648d8903bc69243ce2c472a"}],"database_specific":{"versions":[{"introduced":"2.4.7"},{"fixed":"2.4.52"}]}}],"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"last_affected":"34"}]},{"events":[{"introduced":"0"},{"last_affected":"35"}]},{"events":[{"introduced":"0"},{"last_affected":"36"}]},{"events":[{"introduced":"0"},{"last_affected":"10.0"}]},{"events":[{"introduced":"0"},{"last_affected":"11.0"}]},{"events":[{"introduced":"5.14.0"},{"fixed":"5.20.0"}]},{"events":[{"introduced":"5.16.0"},{"fixed":"202201.1"}]},{"events":[{"introduced":"0"},{"fixed":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"4.3"}]},{"events":[{"introduced":"0"},{"last_affected":"4.4"}]},{"events":[{"introduced":"0"},{"last_affected":"5.0"}]},{"events":[{"introduced":"0"},{"fixed":"9.0"}]},{"events":[{"introduced":"0"},{"fixed":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"12.2.1.3.0"}]},{"events":[{"introduced":"0"},{"last_affected":"12.2.1.4.0"}]},{"events":[{"introduced":"0"},{"last_affected":"17.1"}]},{"events":[{"introduced":"0"},{"last_affected":"17.2"}]},{"events":[{"introduced":"0"},{"last_affected":"17.3"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2020\\-001"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-001"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-002"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-003"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-004"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-005"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-006"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-007"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2021\\-008"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2022\\-001"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2022\\-002"}]},{"events":[{"introduced":"0"},{"last_affected":"10.15.7-security_update_2022\\-003"}]},{"events":[{"introduced":"0"},{"fixed":"10.15.7"}]},{"events":[{"introduced":"11.0"},{"fixed":"11.6.6"}]},{"events":[{"introduced":"12.0.0"},{"fixed":"12.4"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44224.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H"}]}