CVE-2020-25664

medium

Description

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.

References

https://bugzilla.redhat.com/show_bug.cgi?id=1891605

https://lists.fedoraproject.org/archives/list/[email protected]/message/Z3J6D7POCQYQKNVRDYLTTPM5SQC3WVTR/

Details

Source: MITRE

Published: 2020-12-08

Updated: 2021-12-16

Type: CWE-787

Risk Information

CVSS v2

Base Score: 5.8

Vector: AV:N/AC:M/Au:N/C:N/I:P/A:P

Impact Score: 4.9

Exploitability Score: 8.6

Severity: MEDIUM

CVSS v3

Base Score: 6.1

Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H

Impact Score: 4.2

Exploitability Score: 1.8

Severity: MEDIUM