#VU16326 Segmentation fault in PHP

Vulnerability identifier: #VU16326

Vulnerability risk: Low

CVSSv4.0: 7.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/U:Clear]

CVE-ID: N/A

CWE-ID: CWE-264

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 on the target system.

The weakness exists due to segfault while fuzzing typed properties but reproducible on master. A remote attacker can trigger segmentation fault with divide-assign op and __get + __setto cause the service to crash.

Mitigation
Update to version 7.3.0.

Vulnerable software versions

PHP: 7.3.0alpha4

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External links
https://bugs.php.net/bug.php?id=76667

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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.