CVE-2020-27771

low

Description

In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.

References

https://lists.debian.org/debian-lts-announce/2023/03/msg00008.html

https://lists.debian.org/debian-lts-announce/2021/03/msg00030.html

https://bugzilla.redhat.com/show_bug.cgi?id=1898290

Details

Source: Mitre, NVD

Published: 2020-12-04

Updated: 2023-03-11

Risk Information

CVSS v2

Base Score: 4.3

Vector: CVSS2#AV:N/AC:M/Au:N/C:N/I:N/A:P

Severity: Medium

CVSS v3

Base Score: 3.3

Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

Severity: Low