sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle query strings that lack an = (equals sign) character, which allows remote attackers to execute arbitrary code by placing command-line options in the query string, related to lack of skipping a certain php_getopt for the 'd' case.

References

• https://nvd.nist.gov/vuln/detail/CVE-2012-1823
• https://bugs.php.net/bug.php?id=61910
• https://bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff&revision=1335984315&display=1
• http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
• http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041
• http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
• http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html
• http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html
• http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html
• http://marc.info/?l=bugtraq&m=134012830914727&w=2
• http://rhn.redhat.com/errata/RHSA-2012-0546.html
• http://rhn.redhat.com/errata/RHSA-2012-0547.html
• http://rhn.redhat.com/errata/RHSA-2012-0568.html
• http://rhn.redhat.com/errata/RHSA-2012-0569.html
• http://rhn.redhat.com/errata/RHSA-2012-0570.html
• http://secunia.com/advisories/49014
• http://secunia.com/advisories/49065
• http://secunia.com/advisories/49085
• http://secunia.com/advisories/49087
• http://support.apple.com/kb/HT5501
• http://www.debian.org/security/2012/dsa-2465
• http://www.kb.cert.org/vuls/id/520827
• http://www.kb.cert.org/vuls/id/673343
• http://www.mandriva.com/security/advisories?name=MDVSA-2012:068
• http://www.php.net/ChangeLog-5.php#5.4.2
• http://www.php.net/archive/2012.php#id2012-05-03-1
• http://www.securitytracker.com/id?1027022