Bug with Variant type parsing was originally discovered by Condis. There is evidence this vulnerability was being exploited in the wild before official patch release.
Vulnerable component: PHP
CVSSv3 score: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:F/RL:O/RC:C
CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
The vulnerability allows a remote attacker to cause DoS conditions or execute arbitrary code on the target system.
The weakness exists due to buffer overflow in the com_print_typeinfo function. A remote attacker can send a specially crafted arguments, trigger incorrect handling of COM object VARIANT types and cause the target application to crash or execute arbitrary code with privileges of the current user.
Successful exploitation of the vulnerability results in denial of service or arbitrary code execution on the vulnerable system.
Note: the vulnerability was being actively exploited.
- PHP 5.4.3 (Windows x86 Polish) - Code Execution [Exploit-DB]