CVEvulnerability

CVE-2020-25674

5.5 MEDIUM Published 2020-12-08 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-12-08
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
5.5 MEDIUM — CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS 2.0 ([email protected])
4.3 MEDIUM — AV:N/AC:M/Au:N/C:N/I:N/A:P
Weaknesses
CWE-122

Description

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.

Affected configurations

• imagemagick imagemagick (< 6.9.10-68) • imagemagick imagemagick (>= 7.0.0-0 < 7.0.8-68) • debian debian linux 9.0

Related

Weakness · CWE (1)

  • CWE-122 Heap-based Buffer Overflow weakness

References