CVE-2020-27751: 
ImageMagick vulnerability analysis and mitigation

A flaw was found in ImageMagick in MagickCore/quantum-export.c. The vulnerability (CVE-2020-27751) was discovered in versions prior to 7.0.9-0. The issue affects the image processing functionality when handling crafted files (NVD, Debian LTS).

The vulnerability involves undefined behavior in the form of values outside the range of type unsigned long long as well as a shift exponent that is too large for 64-bit type in MagickCore/quantum-export.c. The CVSS v3.1 base score is 3.3 (LOW) with vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L. The vulnerability is classified as CWE-190 (Integer Overflow or Wraparound) (NVD).

This vulnerability would most likely lead to an impact on application availability due to undefined behavior when processing crafted image files. While the primary impact is a potential denial of service, there could be other unspecified problems related to the undefined behavior (NVD, Debian LTS).

The vulnerability requires an attacker to submit a specially crafted file that is processed by ImageMagick. The attack requires user interaction to process the malicious file, but no privileges are needed (NVD).

The vulnerability was fixed in ImageMagick version 7.0.9-0. Users are recommended to upgrade their ImageMagick packages to the fixed version. Various Linux distributions have also released security updates to address this vulnerability, including Debian and Ubuntu (Debian LTS, Ubuntu Notice).