{"id":"CVE-2012-4388","aliases":["EUVD-2012-4328","GHSA-78pr-9xh4-8h52"],"status":"published","title":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly...","description":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.04225,"percentile":0.91068,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2012-09-07T22:00:00Z","modified":"2026-06-16T23:44:55Z","products":[{"vendor":"canonical","product":"ubuntu_linux"},{"vendor":"debian","product":"debian_linux"},{"vendor":"php","product":"php"}],"references":[{"url":"http://security-tracker.debian.org/tracker/CVE-2012-4388","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory"]},{"url":"http://openwall.com/lists/oss-security/2012/09/05/15","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://www.securitytracker.com/id?1027463","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"http://openwall.com/lists/oss-security/2012/09/07/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://svn.php.net/viewvc/php/php-src/branches/PHP_5_4/main/SAPI.c?r1=323986\u0026r2=323985\u0026pathrev=323986","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","Vendor Advisory"]},{"url":"https://bugs.php.net/bug.php?id=60227","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"http://openwall.com/lists/oss-security/2012/08/29/5","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://openwall.com/lists/oss-security/2012/09/02/1","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2013-08/msg00006.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","Mailing List","Third Party Advisory"]},{"url":"http://article.gmane.org/gmane.comp.php.devel/70584","tags":["mailing-list","x_refsource_MLIST","x_transferred","Broken Link"]},{"url":"http://www.ubuntu.com/usn/USN-1569-1","tags":["vendor-advisory","x_refsource_UBUNTU","x_transferred","Third Party Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2012-4388"},{"url":"https://github.com/advisories/GHSA-78pr-9xh4-8h52"}],"sources":{"cve":[{"id":"CVE-2012-4388","description":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.","status":"published","published":"2012-09-07T22:00:00Z","modified":"2024-08-06T20:35:09.222Z","updated_at":"2026-11-02T14:34:51.584538Z"}],"euvd":[{"id":"EUVD-2012-4328","description":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.","status":"published","published":"2012-09-07T22:00:00Z","modified":"2024-08-06T20:35:09Z","updated_at":"2026-11-03T01:56:07.912368Z"}],"ghsa":[{"id":"GHSA-78pr-9xh4-8h52","title":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly...","description":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.","status":"published","published":"2022-05-17T05:04:53Z","modified":"2023-01-28T05:03:21Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:43:57.475723Z"}],"nvd":[{"id":"CVE-2012-4388","description":"The sapi_header_op function in main/SAPI.c in PHP 5.4.0RC2 through 5.4.0 does not properly determine a pointer during checks for %0D sequences (aka carriage return characters), which allows remote attackers to bypass an HTTP response-splitting protection mechanism via a crafted URL, related to improper interaction between the PHP header function and certain browsers, as demonstrated by Internet Explorer and Google Chrome.  NOTE: this vulnerability exists because of an incorrect fix for CVE-2011-1398.","status":"published","published":"2012-09-07T22:55:02.883Z","modified":"2026-06-16T23:44:55.43Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:15.643902Z"}]}}