Vulnerability identifier: #VU8488

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-502

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 perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of the user-input within unserialize () function. A remote attacker with ability to control input data can trigger denial of service (DoS) attack.

Mitigation
Update to version 7.0.23 or 7.1.9.

Vulnerable software versions

PHP: 7.0.0 - 7.0.22, 7.1.0 - 7.1.8

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External links
http://bugs.php.net/bug.php?id=75054

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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.