{"schema_version":"1.7.5","id":"CVE-2021-44224","published":"2021-12-20T12:15:07.393Z","modified":"2026-07-08T05:57:42.329374890Z","aliases":["BIT-apache-2021-44224"],"related":["ALSA-2022:1915","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","SUSE-SU-2026:2686-1","openSUSE-SU-2022:0091-1","openSUSE-SU-2024:11695-1"],"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).","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/apache/httpd","events":[{"introduced":"f2b561181dbd0c689fd583c60878ce05854ec5f9"},{"fixed":"fed3b8a079835cd63648d8903bc69243ce2c472a"}],"database_specific":{"cpe":"cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"2.4.7"},{"fixed":"2.4.52"}],"source":"CPE_RANGE"}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-44224.json"}}],"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":"http://httpd.apache.org/security/vulnerabilities_24.html"},{"type":"ADVISORY","url":"http://seclists.org/fulldisclosure/2022/May/33"},{"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://security.gentoo.org/glsa/202208-20"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20211224-0001/"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213255"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213256"},{"type":"ADVISORY","url":"https://support.apple.com/kb/HT213257"},{"type":"ADVISORY","url":"https://www.debian.org/security/2022/dsa-5035"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2022-01"},{"type":"ADVISORY","url":"https://www.tenable.com/security/tns-2022-03"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpuapr2022.html"},{"type":"FIX","url":"https://www.oracle.com/security-alerts/cpujan2022.html"}],"database_specific":{"unresolved_ranges":[{"cpes":["cpe:2.3:o:apple:macos:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"10.15.7"},{"introduced":"11.0"},{"fixed":"11.6.6"},{"introduced":"12.0.0"},{"fixed":"12.4"}],"source":"CPE_RANGE","vendor_product":"apple:macos"},{"cpes":["cpe:2.3:a:oracle:communications_element_manager:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"9.0"}],"source":"CPE_RANGE","vendor_product":"oracle:communications_element_manager"},{"cpes":["cpe:2.3:a:oracle:communications_session_report_manager:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"9.0"}],"source":"CPE_RANGE","vendor_product":"oracle:communications_session_report_manager"},{"cpes":["cpe:2.3:a:oracle:communications_session_route_manager:*:*:*:*:*:*:*:*"],"extracted_events":[{"fixed":"9.0"}],"source":"CPE_RANGE","vendor_product":"oracle:communications_session_route_manager"},{"cpes":["cpe:2.3:a:tenable:tenable.sc:*:*:*:*:*:*:*:*"],"extracted_events":[{"introduced":"5.14.0"},{"fixed":"5.20.0"},{"introduced":"5.16.0"},{"fixed":"202201.1"}],"source":"CPE_RANGE","vendor_product":"tenable:tenable.sc"},{"cpes":["cpe:2.3:o:apple:mac_os_x:10.15.7:*:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2020-001:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-001:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-002:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-003:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-004:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-005:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-006:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-007:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2021-008:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-001:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-002:*:*:*:*:*:*","cpe:2.3:o:apple:mac_os_x:10.15.7:security_update_2022-003:*:*:*:*:*:*"],"extracted_events":[{"introduced":"10.15.7"},{"last_affected":"10.15.7"},{"introduced":"10.15.7-security_update_2020\\-001"},{"last_affected":"10.15.7-security_update_2020\\-001"},{"introduced":"10.15.7-security_update_2021\\-001"},{"last_affected":"10.15.7-security_update_2021\\-001"},{"introduced":"10.15.7-security_update_2021\\-002"},{"last_affected":"10.15.7-security_update_2021\\-002"},{"introduced":"10.15.7-security_update_2021\\-003"},{"last_affected":"10.15.7-security_update_2021\\-003"},{"introduced":"10.15.7-security_update_2021\\-004"},{"last_affected":"10.15.7-security_update_2021\\-004"},{"introduced":"10.15.7-security_update_2021\\-005"},{"last_affected":"10.15.7-security_update_2021\\-005"},{"introduced":"10.15.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