CVE-2012-1172 Information

Description

The file-upload implementation in rfc1867.c in PHP before 5.4.0 does not properly handle invalid [ (open square bracket) characters in name values which makes it easier for remote attackers to cause a denial of service (malformed $_FILES indexes) or conduct directory traversal attacks during multi-file uploads by leveraging a script that lacks its own filename restrictions.

Reference

http://isisblogs.poly.edu/2011/08/11/php-not-properly-checking-params/ http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080037.html http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080041.html http://lists.fedoraproject.org/pipermail/package-announce/2012-May/080070.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://openwall.com/lists/oss-security/2012/03/13/4 http://support.apple.com/kb/HT5501 http://svn.php.net/viewvc/php/php-src/branches/PHP_5_4/main/rfc1867.c?r1=321664&r2=321663&pathrev=321664 http://svn.php.net/viewvc?view=revision&revision=321664 http://www.debian.org/security/2012/dsa-2465 http://www.php.net/ChangeLog-5.php5.4.0 https://bugs.php.net/bug.php?id=48597 https://bugs.php.net/bug.php?id=49683 https://bugs.php.net/bug.php?id=54374 https://bugs.php.net/bug.php?id=55500 https://nealpoole.com/blog/2011/10/directory-traversal-via-php-multi-file-uploads/ https://students.mimuw.edu.pl/~ai292615/php_multipleupload_overwrite.pdf