#VU10390 Infinite loop in PHP - CVE-2018-5711

Vulnerability identifier: #VU10390

Vulnerability risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-5711

CWE-ID: CWE-835

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
PHP
Universal components / Libraries / Scripting languages

Vendor: PHP Group

Description
The disclosed vulnerability allows a local unauthenticated attacker to cause DoS condition.

The vulnerability exists  in PHP GD Graphics Library due to insufficient sanitization of user-supplied data. A local attacker can submit a specially crafted GIF, trigger an infinite loop and cause the service to crash.

Mitigation
The vulnerability is addressed in the following versions: 5.6.33, 7.0.27, 7.1.13, and 7.2.1.

Vulnerable software versions

PHP: 5.6.0 - 5.6.32, 7.0.0 - 7.0.26, 7.1.0 - 7.1.12, 7.2.0

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External links
https://bugs.php.net/bug.php?id=74782

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.