#VU64231 Buffer overflow in PHP - CVE-2022-31626

Vulnerability identifier: #VU64231

Vulnerability risk: High

CVSSv4.0: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/U:Amber]

CVE-ID: CVE-2022-31626

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: Yes

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 a boundary error when processing password in mysqlnd/pdo in mysqlnd_wireprotocol.c. A remote attacker with ability to control password that is passed via PDO to MySQL server can trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PHP: 7.4 - 7.4.29, 8.0.0 - 8.0.19, 8.1.0 - 8.1.6

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External links
https://bugs.php.net/bug.php?id=81719
https://www.php.net/ChangeLog-8.php#8.1.7
https://www.php.net/ChangeLog-8.php#8.0.20

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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. However, proof of concept for this vulnerability is available.