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

Vulnerability identifier: #VU23005

CSH Severity: High

CVSS v4: 9.2 [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]

CVE-ID: CVE-2019-11037

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Imagick PHP extension
Gentoo Linux
SUSE Linux
Opensuse
Ubuntu
Fedora
php-imagick (Debian package)
php7-pecl-imagick (Alpine package)
php-imagick (Ubuntu package)
php-pecl-imagick
SUSE Package Hub for SUSE Linux Enterprise

Install updates from vendor's website.

Imagick PHP extension - update to 3.4.4
php-imagick (Debian package) - update to 3.4.3~rc2-2+deb9u1
php7-pecl-imagick (Alpine package) - update to 3.4.4-r3
php-imagick (Ubuntu package) - update to 3.4.3~rc2-2ubuntu4.1
php-pecl-imagick - addressed in versions 3.4.4-1.fc28, 3.4.4-1.fc29, 3.4.4-1.fc30

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

• Buffer overflow in PHP imagick extension
• Debian update for php-imagick
• OpenSUSE Linux update for php7-imagick
• OpenSUSE Linux update for php7-imagick
• Gentoo update for PECL Imagick
• Out-of-bounds write in php7-pecl-imagick (Alpine package)
• Ubuntu update for php-imagick
• Fedora 29 update for php-pecl-imagick
• Fedora 30 update for php-pecl-imagick
• Fedora 28 update for php-pecl-imagick