#VU23005 Out-of-bounds write in Imagick PHP extension - CVE-2019-11037

Vulnerability identifier: #VU23005

Vulnerability risk: High

CVSSv4.0: 7.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2019-11037

CWE-ID: CWE-787

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Imagick PHP extension
Universal components / Libraries / Scripting languages

Vendor: Imagick

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input within the ImagickKernel::fromMatrix() function in PHP imagick extension. A remote attacker can create a specially crafted file, pass it to the application, trigger out-of-bounds write and execute arbitrary code on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Imagick PHP extension: 3.3.0 RC1 - 3.4.4 RC2

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External links
https://bugs.php.net/bug.php?id=77791

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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.