Vulnerability · Published Dec 8, 2020 · Assigned by redhat
CVE-2020-25674
Medium 5.5
In plain English
A medium-severity heap buffer overflow in ImageMagick. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 64% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | imagemagick | 8:6.9.11.24+dfsg-1 | DEBIAN-CVE-2020-25674 |
| Debian:13 | imagemagick | 8:6.9.11.24+dfsg-1 | DEBIAN-CVE-2020-25674 |
| Debian:14 | imagemagick | 8:6.9.11.24+dfsg-1 | DEBIAN-CVE-2020-25674 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| n/a | ImageMagick | prior to 7.0.8-68 |
Weakness: CWE-122