The cURL extension files (1) ext/curl/interface.c and (2) ext/curl/streams.c in PHP before 5.1.5 permit the CURLOPT_FOLLOWLOCATION option when open_basedir or safe_mode is enabled, which allows attackers to perform unauthorized actions, possibly related to the realpath cache.

References

• https://nvd.nist.gov/vuln/detail/CVE-2006-4483
• http://cvs.php.net/viewcvs.cgi/php-src/ext/curl/interface.c?r1=1.62.2.14.2.6&r2=1.62.2.14.2.7
• http://cvs.php.net/viewcvs.cgi/php-src/ext/curl/interface.c?view=log
• http://cvs.php.net/viewvc.cgi/php-src/ext/curl/streams.c?r1=1.14.2.2.2.3&r2=1.14.2.2.2.4
• http://secunia.com/advisories/21546
• http://secunia.com/advisories/22039
• http://secunia.com/advisories/30411
• http://securitytracker.com/id?1016984
• http://wiki.rpath.com/wiki/Advisories:rPSA-2008-0178
• http://www.novell.com/linux/security/advisories/2006_52_php.html
• http://www.php.net/ChangeLog-5.php#5.1.5
• http://www.php.net/release_5_1_5.php
• http://www.securityfocus.com/archive/1/492671/100/0/threaded
• http://www.securityfocus.com/bid/19582
• http://www.vupen.com/english/advisories/2006/3318