#VU7346 Heap-out-of-bounds write


Published: 2017-07-06

Vulnerability identifier: #VU7346

Vulnerability risk: High

CVSSv3.1:

CVE-ID: CVE-2017-9226

CWE-ID: CWE-787

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 execute arbitrary code.

The weakness exists in the mbstring due to heap out-of-bounds write or read occurs in next_state_val() during regular expression compilation. A remote attacker can supply a malformed regular expression containing an octal number in the form of '\700', trigger
out-of-bounds write memory corruption and execute arbitrary code with web server privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to version 7.0.21.

Vulnerable software versions

PHP: 7.0.0 - 7.0.20


CPE

External links
http://php.net/ChangeLog-7.php#7.0.21


Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?


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