CVE-2020-25664

Published: 8 December 2020

In WriteOnePNGImage() of the PNG coder at coders/png.c, an improper call to AcquireVirtualMemory() and memset() allows for an out-of-bounds write later when PopShortPixel() from MagickCore/quantum-private.h is called. The patch fixes the calls by adding 256 to rowbytes. An attacker who is able to supply a specially crafted image could affect availability with a low impact to data integrity. This flaw affects ImageMagick versions prior to 6.9.10-68 and 7.0.8-68.

Priority

Medium

CVSS 3 base score: 6.1

Status

Notes

fix attempt was reverted
unclear what the fix for this issue is as of 2021-06-10

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25664
• https://ubuntu.com/security/notices/USN-5335-1
• NVD
• Launchpad
• Debian

Bugs

• https://github.com/ImageMagick/ImageMagick/issues/1716