{"id":"CVE-2021-36160","aliases":["ALPINE-CVE-2021-36160","ALSA-2022:1915","AZL-6485","BELL-CVE-2021-36160","BIT-apache-2021-36160","CLSA-2022-1644869383","CLSA-2022-1644869841","DEBIAN-CVE-2021-36160","DLA-2768-1","DSA-4982-1","EUVD-2021-22784","GHSA-f4wr-wvqf-r2q5","MGASA-2021-0439","OESA-2021-1369","RHSA-2022:1915","RHSA-2022:6753","RHSA-2022:7143","RLSA-2022:1915","SUSE-SU-2021:3335-1","SUSE-SU-2021:3522-1","UBUNTU-CVE-2021-36160","USN-5090-1","openSUSE-SU-2021:1438-1","openSUSE-SU-2021:3522-1"],"status":"published","title":"mod_proxy_uwsgi out of bound read","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","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":0.63721,"percentile":0.9923,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2021-09-16T14:40:18Z","modified":"2026-10-29T11:01:15Z","fixes":[{"ecosystem":"Alpine:v3.11","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.12","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.13","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.14","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.15","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.16","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.17","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.18","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.19","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.20","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.21","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.22","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.23","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Alpine:v3.24","package":"apache2","fixed_in":["2.4.49-r0"],"sources":["osv"]},{"ecosystem":"Azure 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This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2021-09-16T15:15:07.33Z","modified":"2026-10-23T17:17:56.199391149Z","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":"2026-11-02T15:27:48.646074Z"},{"id":"AZL-6485","title":"CVE-2021-36160 affecting package httpd for versions less than 2.4.52-1","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2021-09-16T15:15:07Z","modified":"2026-04-21T04:32:35.014409Z","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":"2026-11-02T15:28:08.076947Z"},{"id":"BELL-CVE-2021-36160","title":"CVE-2021-36160 does not affect BellSoft software","status":"withdrawn","published":"2023-08-31T12:16:15.489589Z","modified":"2026-01-26T09:50:05.21282Z","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":"2026-11-02T15:28:16.5265Z"},{"id":"CVE-2021-36160","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2021-09-16T15:15:07.33Z","modified":"2026-10-24T10:30:43.826078794Z","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":"2026-11-02T15:44:20.434873Z"},{"id":"DEBIAN-CVE-2021-36160","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2021-09-16T15:15:07.33Z","modified":"2026-10-23T18:03:16.308953587Z","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":"2026-11-02T15:45:35.233346Z"},{"id":"OESA-2021-1369","title":"httpd security update","description":"Apache HTTP Server is a powerful and flexible HTTP/1.1 compliant web server.\r\n\r\nSecurity Fix(es):\r\n\r\nA carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).(CVE-2021-36160)\r\n\r\nMalformed requests may cause the server to dereference a NULL pointer. This issue affects Apache HTTP Server 2.4.48 and earlier.(CVE-2021-34798)\r\n\r\nA crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier.(CVE-2021-40438)","status":"published","published":"2021-09-30T11:04:38Z","modified":"2026-08-18T01:16:02.486150805Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:52:38.987987Z"},{"id":"RHSA-2022:1915","title":"Red Hat Security Advisory: httpd:2.4 security and bug fix update","status":"published","published":"2024-09-13T20:34:00Z","modified":"2026-10-09T10:04:03Z","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":"2026-11-02T15:53:09.62945Z"},{"id":"RHSA-2022:6753","title":"Red Hat Security Advisory: httpd24-httpd security and bug fix update","status":"published","published":"2024-09-13T23:20:13Z","modified":"2026-10-09T10:04:48Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RHSA-2022:7143","title":"Red Hat Security Advisory: Red Hat JBoss Core Services Apache HTTP Server 2.4.51 security update","status":"published","published":"2024-09-13T20:33:46Z","modified":"2026-10-09T10:05:13Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:53:10.139266Z"},{"id":"RLSA-2022:1915","title":"Moderate: httpd:2.4 security and bug fix update","description":"The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: Request splitting via HTTP/2 method injection and mod_proxy (CVE-2021-33193)\n\n* httpd: mod_proxy_uwsgi: out-of-bounds read via a crafted request uri-path (CVE-2021-36160)\n\n* httpd: possible NULL dereference or SSRF in forward proxy configurations (CVE-2021-44224)\n\n* httpd: Single zero byte stack overflow in mod_auth_digest (CVE-2020-35452)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Rocky Linux 8.6 Release Notes linked from the References section.","status":"published","published":"2022-05-10T08:07:40Z","modified":"2026-02-04T09:45:07.16952Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T15:53:24.322216Z"},{"id":"UBUNTU-CVE-2021-36160","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2021-09-16T15:15:00Z","modified":"2026-04-22T12:57:31.464676Z","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":"2026-11-02T15:54:27.870979Z"},{"id":"ALSA-2022:1915","title":"Moderate: httpd:2.4 security and bug fix update","description":"The httpd packages provide the Apache HTTP Server, a powerful, efficient, and extensible web server.\n\nSecurity Fix(es):\n\n* httpd: Request splitting via HTTP/2 method injection and mod_proxy (CVE-2021-33193)\n\n* httpd: mod_proxy_uwsgi: out-of-bounds read via a crafted request uri-path (CVE-2021-36160)\n\n* httpd: possible NULL dereference or SSRF in forward proxy configurations (CVE-2021-44224)\n\n* httpd: Single zero byte stack overflow in mod_auth_digest (CVE-2020-35452)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section.","status":"published","published":"2022-05-10T08:07:40Z","modified":"2026-10-29T11:01:15.87935591Z","updated_at":"2026-11-02T15:27:51.196609Z"},{"id":"BIT-apache-2021-36160","title":"mod_proxy_uwsgi out of bound read","description":"A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive).","status":"published","published":"2024-03-06T10:55:19.901Z","modified":"2026-09-08T08:45:06.520637974Z","updated_at":"2026-11-02T15:28:28.267217Z"},{"id":"CLSA-2022-1644869383","title":"Fix of CVE: CVE-2021-39275, CVE-2021-36160, CVE-2021-34798, CVE-2021-44224","description":"- CVE-2021-44224: possible NULL dereference or SSRF in forward proxy configurations\n- CVE-2021-39275: out-of-bounds write in ap_escape_quotes() via malicious input\n- CVE-2021-36160: mod_proxy_uwsgi: out-of-bounds read via a crafted request uri-path\n- CVE-2021-34798: NULL pointer dereference via malformed requests","status":"published","published":"2022-02-14T20:09:43Z","modified":"2026-10-21T10:47:59.43345934Z","updated_at":"2026-11-02T15:43:39.801198Z"},{"id":"CLSA-2022-1644869841","title":"Fix of CVE: CVE-2021-34798, CVE-2021-39275, CVE-2021-36160, CVE-2021-44224","description":"- CVE-2021-44224: possible NULL dereference or SSRF in forward proxy configurations\n- CVE-2021-39275: out-of-bounds write in ap_escape_quotes() via malicious input\n- CVE-2021-36160: mod_proxy_uwsgi: out-of-bounds read via a crafted request uri-path\n- CVE-2021-34798: NULL pointer dereference via malformed requests","status":"published","published":"2022-02-14T20:17:21Z","modified":"2026-10-21T10:47:06.840840995Z","updated_at":"2026-11-02T15:43:39.801198Z"},{"id":"DLA-2768-1","title":"uwsgi - security update","status":"published","published":"2021-09-29T00:00:00Z","modified":"2026-03-09T01:23:36.053187Z","updated_at":"2026-11-02T15:46:11.189256Z"},{"id":"DSA-4982-1","title":"apache2 - security update","status":"published","published":"2021-10-08T00:00:00Z","modified":"2026-03-09T02:09:02.78303Z","updated_at":"2026-11-02T15:46:17.19998Z"},{"id":"MGASA-2021-0439","title":"Updated apache packages fix security vulnerability","description":"A crafted method sent through HTTP/2 will bypass validation and be\nforwarded by mod_proxy, which can lead to request splitting or cache\npoisoning. (CVE-2021-33193)\n\nMalformed requests may cause the server to dereference a NULL pointer.\n(CVE-2021-34798)\n\nA carefully crafted request uri-path can cause mod_proxy_uwsgi to read\nabove the allocated memory and crash (DoS). (CVE-2021-36160)\n\nap_escape_quotes() may write beyond the end of a buffer when given\nmalicious input. No included modules pass untrusted data to these\nfunctions, but third-party / external modules may. (CVE-2021-39275)\n\nA crafted request uri-path can cause mod_proxy to forward the request to\nan origin server choosen by the remote user. (CVE-2021-40438)\n","status":"published","published":"2021-09-23T04:49:29Z","modified":"2026-04-16T04:42:42.080620113Z","updated_at":"2026-11-02T15:49:41.849028Z"},{"id":"openSUSE-SU-2021:1438-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2021-40438: Fixed a SRF via a crafted request uri-path. (bsc#1190703)\n- CVE-2021-36160: Fixed an out-of-bounds read via a crafted request uri-path. (bsc#1190702)\n- CVE-2021-39275: Fixed an out-of-bounds write in ap_escape_quotes() via malicious input. (bsc#1190666)\n- CVE-2021-34798: Fixed a NULL pointer dereference via malformed requests. (bsc#1190669)\n\nThis update was imported from the SUSE:SLE-15-SP2:Update update project.","status":"published","published":"2021-11-02T11:51:52Z","modified":"2026-02-04T02:47:39.840785Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"openSUSE-SU-2021:3522-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2021-40438: Fixed a SRF via a crafted request uri-path. (bsc#1190703)\n- CVE-2021-36160: Fixed an out-of-bounds read via a crafted request uri-path. (bsc#1190702)\n- CVE-2021-39275: Fixed an out-of-bounds write in ap_escape_quotes() via malicious input. (bsc#1190666)\n- CVE-2021-34798: Fixed a NULL pointer dereference via malformed requests. (bsc#1190669)\n","status":"published","published":"2021-10-26T13:40:11Z","modified":"2026-02-04T03:56:08.500051Z","updated_at":"2026-11-02T16:58:32.266854Z"},{"id":"SUSE-SU-2021:3335-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2021-40438: Fixed a SRF via a crafted request uri-path. (bsc#1190703)\n- CVE-2021-36160: Fixed an out-of-bounds read via a crafted request uri-path. (bsc#1190702)\n- CVE-2021-39275: Fixed an out-of-bounds write in ap_escape_quotes() via malicious input. (bsc#1190666)\n- CVE-2021-34798: Fixed a NULL pointer dereference via malformed requests. (bsc#1190669)\n- CVE-2021-33193: Fixed request splitting via HTTP/2 method injection and mod_proxy. (bsc#1189387)\n","status":"published","published":"2021-10-12T06:19:02Z","modified":"2026-02-04T03:56:31.213024Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"SUSE-SU-2021:3522-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- CVE-2021-40438: Fixed a SRF via a crafted request uri-path. (bsc#1190703)\n- CVE-2021-36160: Fixed an out-of-bounds read via a crafted request uri-path. (bsc#1190702)\n- CVE-2021-39275: Fixed an out-of-bounds write in ap_escape_quotes() via malicious input. (bsc#1190666)\n- CVE-2021-34798: Fixed a NULL pointer dereference via malformed requests. (bsc#1190669)\n","status":"published","published":"2021-10-26T13:40:10Z","modified":"2026-02-04T03:25:39.940824Z","updated_at":"2026-11-02T15:53:49.605187Z"},{"id":"USN-5090-1","title":"apache2 vulnerabilities","description":"James Kettle discovered that the Apache HTTP Server HTTP/2 module\nincorrectly handled certain crafted methods. A remote attacker could\npossibly use this issue to perform request splitting or cache poisoning\nattacks. (CVE-2021-33193)\n\nIt was discovered that the Apache HTTP Server incorrectly handled certain\nmalformed requests. A remote attacker could possibly use this issue to\ncause the server to crash, resulting in a denial of service.\n(CVE-2021-34798)\n\nLi Zhi Xin discovered that the Apache mod_proxy_uwsgi module incorrectly\nhandled certain request uri-paths. A remote attacker could possibly use\nthis issue to cause the server to crash, resulting in a denial of service.\nThis issue only affected Ubuntu 20.04 LTS and Ubuntu 21.04.\n(CVE-2021-36160)\n\nIt was discovered that the Apache HTTP Server incorrectly handled escaping\nquotes. If the server was configured with third-party modules, a remote\nattacker could use this issue to cause the server to crash, resulting in a\ndenial of service, or possibly execute arbitrary code. (CVE-2021-39275)\n\nIt was discovered that the Apache mod_proxy module incorrectly handled\ncertain request uri-paths. A remote attacker could possibly use this issue\nto cause the server to forward requests to arbitrary origin servers.\n(CVE-2021-40438)\n","status":"published","published":"2021-09-27T14:06:45Z","modified":"2026-04-22T10:18:11.742873Z","updated_at":"2026-11-02T16:58:15.683829Z"}]}}