[Pkg-gmagick-im-team] Bug#1118340: imagemagick: CVE-2025-62171

[Salvatore Bonaccorso]

Hi,

On Sat, Oct 18, 2025 at 11:42:48AM +0200, Bastien Roucaries wrote:
> Le samedi 18 octobre 2025, 09:18:42 heure d’été d’Europe centrale Salvatore Bonaccorso a écrit :
> > Source: imagemagick
> > Version: 8:7.1.2.3+dfsg1-1
> > Severity: important
> > Tags: security upstream
> > X-Debbugs-Cc: carnil at debian.org, Debian Security Team <team at security.debian.org>
> > 
> > Hi,
> > 
> > The following vulnerability was published for imagemagick.
> > 
> > CVE-2025-62171[0]:
> > | ImageMagick is an open source software suite for displaying,
> > | converting, and editing raster image files. In ImageMagick versions
> > | prior to 7.1.2-7 and 6.9.13-32, an integer overflow vulnerability
> > | exists in the BMP decoder on 32-bit systems. The vulnerability
> > | occurs in coders/bmp.c when calculating the extent value by
> > | multiplying image columns by bits per pixel. On 32-bit systems with
> > | size_t of 4 bytes, a malicious BMP file with specific dimensions can
> > | cause this multiplication to overflow and wrap to zero. The overflow
> > | check added to address CVE-2025-57803 is placed after the overflow
> > | occurs, making it ineffective. A specially crafted 58-byte BMP file
> > | with width set to 536,870,912 and 32 bits per pixel can trigger this
> > | overflow, causing the bytes_per_line calculation to become zero.
> > | This vulnerability only affects 32-bit builds of ImageMagick where
> > | default resource limits for width, height, and area have been
> > | manually increased beyond their defaults. 64-bit systems with size_t
> > | of 8 bytes are not vulnerable, and systems using default ImageMagick
> > | resource limits are not vulnerable. The vulnerability is fixed in
> > | versions 7.1.2-7 and 6.9.13-32.
> > 
> > 
> > If you fix the vulnerability please also make sure to include the
> > CVE (Common Vulnerabilities & Exposures) id in your changelog entry.
> 
> For me it is a no-dsa one due to policy.xml forbidding such big file

Agreeed that this is no-dsa, I just marked it as such.

> So will like to downgrade to minor and will made a point release

Yes if you feel strong, you can downgrade. Point release update is in
any case enough.

Regards,
Salvatore