#VU16098 Integer overflow in PHP - CVE-2014-3669

Vulnerability identifier: #VU16098

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: CVE-2014-3669

CWE-ID: CWE-190

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 cause DoS condition or execute arbitrary code on the target system.

The vulnerability exists due to integer overflow in the object_custom function in ext/standard/var_unserializer.c in PHP before 5.4.34, 5.5.x before 5.5.18, and 5.6.x before 5.6.2. A remote attacker can trigger memory corruption via an argument to the unserialize function that triggers calculation of a large length value and cause the service to crash or execute arbitrary code.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

PHP: 5.4.0 - 5.4.33, 5.5.0 - 5.5.17, 5.6.0 - 5.6.1

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External links
https://bugs.php.net/bug.php?id=68044

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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.