Division by zero in ImageMagick - CVE-2021-40211

Vulnerability identifier: #VU82117

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-40211

CWE-ID: CWE-369

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service attack.

The vulnerability exists due to a division by zero error within the ReadEnhMetaFile() function in coders/emf.c. A remote attacker can pass specially crafted data to the application and crash it.

ImageMagick
Oracle Linux
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux for Power, little endian
CentOS
Anolis OS
ImageMagick
ImageMagick-c++
ImageMagick-c++-devel
ImageMagick-devel
ImageMagick-doc
ImageMagick-perl
ImageMagick (Red Hat package)

Install update from vendor's website.

ImageMagick - update to 7.1.0-5
ImageMagick - update to 6.9.10.68-7
ImageMagick-c++ - update to 6.9.10.68-7
ImageMagick-c++-devel - update to 6.9.10.68-7
ImageMagick-devel - update to 6.9.10.68-7
ImageMagick-doc - update to 6.9.10.68-7
ImageMagick-perl - update to 6.9.10.68-7
ImageMagick (Red Hat package) - update to 6.9.10.68-7.el7_9

• https://github.com/ImageMagick/ImageMagick/issues/4097

• Denial of service in ImageMagick
• Red Hat Enterprise Linux 7 update for ImageMagick
• Multiple vulnerabilities in Oracle Linux
• CentOS 7 update for ImageMagick
• Anolis OS update for ImageMagick