The chunk_split function in string.c in PHP 5.2.3 does not properly calculate the needed buffer size due to precision loss when performing integer arithmetic with floating point numbers, which has unknown attack vectors and impact, possibly resulting in a heap-based buffer overflow. NOTE: this is due to an incomplete fix for CVE-2007-2872.
The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.
| Link | Tags |
|---|---|
| https://launchpad.net/bugs/173043 | |
| http://lists.opensuse.org/opensuse-security-announce/2008-01/msg00006.html | vendor advisory |
| http://secunia.com/advisories/28658 | third party advisory |
| http://www.gentoo.org/security/en/glsa/glsa-200710-02.xml | vendor advisory |
| http://secunia.com/advisories/27864 | third party advisory |
| http://www.php.net/ChangeLog-5.php#5.2.4 | |
| https://usn.ubuntu.com/549-1/ | vendor advisory |
| https://issues.rpath.com/browse/RPL-1702 | |
| http://secunia.com/advisories/26838 | third party advisory |
| http://secunia.com/advisories/27102 | third party advisory |
| http://www.php.net/releases/5_2_4.php | patch |
| http://www.ubuntu.com/usn/usn-549-2 | vendor advisory |
| http://cvs.php.net/viewvc.cgi/php-src/ext/standard/string.c?r1=1.445.2.14.2.58&r2=1.445.2.14.2.59 | exploit |
| http://secunia.com/advisories/26642 | third party advisory patch |