Vulnerability identifier: #VU16135

Vulnerability risk: Low

CVSSv3.1: 6.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2016-7478

CWE-ID: CWE-835

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 cause DoS condition on the target system.

The vulnerability exists due to infinite loop in zend/zend_exceptions.c in PHP, possibly 5.x before 5.6.28 and 7.x before 7.0.13. A remote attacker can trigger infinite loop and cause the service to crash via a crafted Exception object in serialized data.

Mitigation
Install update from vendor's website.

Vulnerable software versions

PHP: 5.6.0 - 5.6.27, 7.0.0 - 7.0.12

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External links
http://bugs.php.net/bug.php?id=73093

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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.