#VU7350 Heap use-after-free in PHP

Vulnerability identifier: #VU7350

Vulnerability risk: Low

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/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: N/A

CWE-ID: CWE-416

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.

The weakness exists in Core PHP due to heap use-after-free error in unserealize within zval_get_type (). A remote attacker can trigger memory corruption and cause the application to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 7.0.21.

Vulnerable software versions

PHP: 7.0.0 - 7.0.20

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External links
https://php.net/ChangeLog-7.php#7.0.21
https://bugs.php.net/bug.php?id=74101

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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.