{"id":"CVE-2012-0021","aliases":["BELL-CVE-2012-0021","DEBIAN-CVE-2012-0021","EUVD-2012-0062","GHSA-mq76-p4cp-m2vg","RHSA-2012:0542","SUSE-SU-2017:2907-1","openSUSE-SU-2024:10268-1"],"status":"published","title":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP...","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","severity":{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.30337,"percentile":0.98242,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2012-01-28T02:00:00Z","modified":"2026-10-23T17:47:29Z","fixes":[{"ecosystem":"Debian:12","package":"apache2","fixed_in":["2.2.22-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"apache2","fixed_in":["2.2.22-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"apache2","fixed_in":["2.2.22-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"apache2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.22-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"apache2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.22-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"apache2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.2.22-1"}]}]},{"source":"osv","ecosystem":"Red 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log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2012-01-28T02:00:00Z","modified":"2024-08-06T18:09:17.166Z","updated_at":"2026-11-02T14:34:52.981189Z"}],"euvd":[{"id":"EUVD-2012-0062","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2012-01-28T02:00:00Z","modified":"2024-08-06T18:09:17Z","updated_at":"2026-11-03T01:56:23.098352Z"}],"ghsa":[{"id":"GHSA-mq76-p4cp-m2vg","title":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP...","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2022-05-04T00:27:42Z","modified":"2025-04-11T03:55:51Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:10.591916Z"}],"nvd":[{"id":"CVE-2012-0021","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2012-01-28T04:05:00.75Z","modified":"2026-06-16T23:36:30.433Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:P","level":"low","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:13.468343Z"}],"osv":[{"id":"BELL-CVE-2012-0021","title":"CVE-2012-0021 does not affect BellSoft software","status":"withdrawn","published":"2012-01-28T04:05:00Z","modified":"2026-01-28T07:21:15.885925Z","cvss":[{"version":"2.0","score":2.6,"vector":"AV:N/AC:H/Au:N/C:N/I:N/A:P","level":"low"}],"updated_at":"2026-11-02T15:28:12.886815Z"},{"id":"CVE-2012-0021","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2012-01-28T04:05:00Z","modified":"2026-04-10T03:42:08.635386Z","updated_at":"2026-11-02T15:43:58.279353Z"},{"id":"DEBIAN-CVE-2012-0021","description":"The log_cookie function in mod_log_config.c in the mod_log_config module in the Apache HTTP Server 2.2.17 through 2.2.21, when a threaded MPM is used, does not properly handle a %{}C format string, which allows remote attackers to cause a denial of service (daemon crash) via a cookie that lacks both a name and a value.","status":"published","published":"2012-01-28T04:05:00.75Z","modified":"2026-10-23T17:47:29.215286864Z","updated_at":"2026-11-02T15:45:24.92418Z"},{"id":"openSUSE-SU-2024:10268-1","title":"apache2-2.4.23-4.1 on GA media","description":"These are all security issues fixed in the apache2-2.4.23-4.1 package on the GA media of openSUSE Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2026-02-04T03:25:01.364403Z","updated_at":"2026-11-02T16:58:33.135986Z"},{"id":"RHSA-2012:0542","title":"Red Hat Security Advisory: httpd security and bug fix update","status":"published","published":"2024-09-15T19:33:21Z","modified":"2026-05-15T10:46:08.337587Z","updated_at":"2026-11-02T15:53:01.495018Z"},{"id":"SUSE-SU-2017:2907-1","title":"Security update for apache2","description":"This update for apache2 fixes the following issues:\n\n- Allow disabling SNI on proxy connections using 'SetEnv proxy-disable-sni 1' in the configuration files. (bsc#1052830)\n- Allow ECDH again in mod_ssl, it had been incorrectly disabled with the 2.2.34 update. (bsc#1064561)\n\nFollowing security issue has been fixed:\n\n- CVE-2017-9798: A use-after-free in the OPTIONS command could be used by attackers to disclose memory of the apache server process, when htaccess uses incorrect Limit statement. (bsc#1058058)\n\nAdditionally, references to the following security issues, fixed by the previous version-update of apache2\nto Apache HTTPD 2.2.34 have been added:\n\n- CVE-2017-7668: The HTTP strict parsing introduced a bug in token list parsing, which allowed ap_find_token() to\n  search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may\n  have be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value. (bsc#1045061)\n- CVE-2017-3169: mod_ssl may have de-referenced a NULL pointer when third-party modules call \n  ap_hook_process_connection() during an HTTP request to an HTTPS port allowing for DoS. (bsc#1045062)\n- CVE-2017-3167: Use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may have\n  lead to authentication requirements being bypassed. (bsc#1045065)\n- CVE-2017-7679: mod_mime could have read one byte past the end of a buffer when sending a malicious Content-Type\n  response header. (bsc#1045060)\n","status":"published","published":"2017-10-30T14:55:59Z","modified":"2026-02-04T04:33:58.707919Z","updated_at":"2026-11-02T15:53:44.209561Z"}]}}