#VU204 Integer overflow in virtual_file_ex() in PHP

Vulnerability identifier: #VU204

Vulnerability risk: High

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: N/A

CWE-ID: CWE-119

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 on the target system.

The vulnerability exists due to integer overflow in path_length variable in virtual_file_ex() function. A remote unauthenticated attacker can execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install the latest versions: (5.5.38, 5.6.24, 7.0.9).

Vulnerable software versions

PHP: 5.5.0 - 5.5.37, 5.6.0 - 5.6.23, 7.0.0 - 7.0.8

---

External links
https://bugs.php.net/bug.php?id=72513
https://php.net/ChangeLog-5.php#5.6.24
https://www.php.net/ChangeLog-7.php#7.0.9
https://php.net/ChangeLog-5.php#5.5.38

---

Q & A

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.