ext/standard/var_unserializer.re in PHP before 5.6.26 mishandles object-deserialization failures, which allows remote attackers to cause a denial of service (memory corruption) or possibly have unspecified other impact via an unserialize call that references a partially constructed object.
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://security.gentoo.org/glsa/201611-22 | vendor advisory |
| http://www.securitytracker.com/id/1036836 | vdb entry |
| https://bugs.php.net/bug.php?id=73052 | issue tracking exploit |
| http://www.openwall.com/lists/oss-security/2016/09/15/10 | mailing list |
| https://github.com/php/php-src/commit/6a7cc8ff85827fa9ac715b3a83c2d9147f33cd43?w=1 | issue tracking patch |
| http://www.php.net/ChangeLog-5.php | release notes |
| http://www.securityfocus.com/bid/93009 | vdb entry |