In PHP before 5.6.31, an invalid free in the WDDX deserialization of boolean parameters could be used by attackers able to inject XML for deserialization to crash the PHP interpreter, related to an invalid free for an empty boolean element in ext/wddx/wddx.c.
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
| Link | Tags |
|---|---|
| http://openwall.com/lists/oss-security/2017/07/10/6 | mailing list third party advisory patch |
| https://www.tenable.com/security/tns-2017-12 | |
| http://www.securityfocus.com/bid/99553 | vdb entry |
| https://bugs.php.net/bug.php?id=74145 | issue tracking patch vendor advisory |
| https://access.redhat.com/errata/RHSA-2018:1296 | vendor advisory |
| http://php.net/ChangeLog-5.php | release notes vendor advisory |
| https://security.netapp.com/advisory/ntap-20180112-0001/ | |
| https://www.debian.org/security/2018/dsa-4081 | vendor advisory |
| https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=2aae60461c2ff7b7fbcdd194c789ac841d0747d7 |