Vulnerability identifier: #VU9956
Vulnerability risk: Low
CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-502
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 perform a denial of service (DoS) attack.
The vulnerability exists due to a buffer over-read while unserializing untrusted data in the finish_nested_data function in ext/standard/var_unserializer.re. A remote attacker can perform a denial of service attack.
Mitigation
The vendor has issued the following versions to address this vulnerability: 5.6.31, 7.0.21, 7.1.7.
Vulnerable software versions
PHP: 5.6.0 - 5.6.30, 7.0.0 - 7.0.20, 7.1.0 - 7.1.6
External links
http://php.net/ChangeLog-5.php
http://php.net/ChangeLog-7.php
http://bugs.php.net/bug.php?id=74111
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.