CVE-2020-25674 Detail

Current 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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  5.5 MEDIUM
Vector:  CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H


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Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

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Hyperlink Resource
https://bugzilla.redhat.com/show_bug.cgi?id=1891928 Exploit  Issue Tracking  Patch  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2021/01/msg00010.html

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read Provider acceptance level Red Hat, Inc.  
CWE-122 Heap-based Buffer Overflow Provider acceptance level Red Hat, Inc.  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2020-25674
NVD Published Date:
12/08/2020
NVD Last Modified:
01/12/2021
Source:
Red Hat, Inc.