Vulnerability identifier: #VU7357
Vulnerability risk: High
CVSSv3.1: 8.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-415
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
PHP
Universal components / Libraries /
Scripting languages
Vendor: PHP Group
Description
The vulnerability allows a remote attacker to execute arbitrary code.
The weakness exists due to double free. A remote attacker can create a node list using the DOMXPath query() or evaluate() functions, remove the nodes from the document by writing to nodeValue of an ancestor, trigger "double free or corruption" and execute arbitrary code with web server privileges.
Successful exploitation of the vulnerability may result in system compromise.
Mitigation
Update to version 7.0.21.
Vulnerable software versions
PHP: 7.0.0 - 7.0.20
External links
http://php.net/ChangeLog-7.php#7.0.21
http://bugs.php.net/bug.php?id=69373
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.