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CVE-2020-25674

Status Candidate

Overview

WriteOnePNGImage() from coders/png.c (the PNG coder) has a for loop with an improper exit condition that can allow an out-of-bounds READ via heap-buffer-overflow. This occurs because it is possible for the colormap to have less than 256 valid values but the loop condition will loop 256 times, attempting to pass invalid colormap data to the event logger. The patch replaces the hardcoded 256 value with a call to MagickMin() to ensure the proper value is used. This could impact application availability when a specially crafted input file is processed by ImageMagick. This flaw affects ImageMagick versions prior to 7.0.8-68.

Related Files

Ubuntu Security Notice USN-5335-1
Posted Mar 21, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5335-1 - It was discovered that ImageMagick incorrectly handled certain values when processing XPM image data or large images. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program. Suhwan Song discovered that ImageMagick incorrectly handled memory when processing PNG,PALM,MIFF image data. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2017-13144, CVE-2020-25674, CVE-2020-27760, CVE-2020-27766, CVE-2020-27770, CVE-2021-20176
SHA-256 | d71ef36c95a343d18886a6914e5af77ad30344146938b827f9f916138328f31c
Ubuntu Security Notice USN-4988-1
Posted Jun 15, 2021
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4988-1 - It was discovered that ImageMagick incorrectly handled certain malformed image files. If a user or automated system using ImageMagick were tricked into opening a specially crafted image, an attacker could exploit this to cause a denial of service or possibly execute code with the privileges of the user invoking the program.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2017-14528, CVE-2020-25674, CVE-2020-27751, CVE-2020-27756, CVE-2020-27760, CVE-2020-27764, CVE-2020-27768, CVE-2020-27772, CVE-2020-27776
SHA-256 | 5551539bfee9d759009fe862c47462e4fe2c567bec95ae55b9737c8afccdf944
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