Detections
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SCA: security update for github.com/t2bot/matrix-media-repo (GHSA-rcxc-wjgw-579r)
medium Tenable Self-Hosted Container Security Plugin ID 418681
Description
There are packages installed that are affected by a vulnerability referenced in the following CVE:- Matrix Media Repo (MMR) is a highly configurable multi-homeserver media repository for Matrix. If SVG or
JPEGXL thumbnailers are enabled (they are disabled by default), a user may upload a file which claims to
be either of these types and request a thumbnail to invoke a different decoder in ImageMagick. In some
ImageMagick installations, this includes the capability to run Ghostscript to decode the image/file. If
MP4 thumbnailers are enabled (also disabled by default), the same issue as above may occur with the ffmpeg
installation instead. MMR uses a number of other decoders for all other file types when preparing
thumbnails. Theoretical issues are possible with these decoders, however in testing they were not possible
to exploit. This is fixed in MMR v1.3.8. MMR now inspects the mimetype of media prior to thumbnailing, and
picks a thumbnailer based on those results instead of relying on user-supplied values. This may lead to
fewer thumbnails when obscure file shapes are used. This also helps narrow scope of theoretical issues
with all decoders MMR uses for thumbnails. Users are advised to upgrade. Users unable to upgrade may
disable the SVG, JPEGXL, and MP4 thumbnail types in the MMR config which prevents the decoders from being
invoked. Further disabling uncommon file types on the server is recommended to limit risk surface.
Containers and other similar technologies may also be used to limit the impact of vulnerabilities in
external decoders, like ImageMagick and ffmpeg. Some installations of ImageMagick may disable "unsafe"
file types, like PDFs, already. This option can be replicated to other environments as needed. ffmpeg may
be compiled with limited decoders/codecs. The Docker image for MMR disables PDFs and similar formats by
default. (CVE-2024-56515)
See Also
Plugin Details
Severity: Medium
ID: 418681
Version: Revision 1.8
Type: Local
Family: SCA Checks
Published: 1/23/2025
Updated: 7/2/2026
Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.51
Vendor
Vendor Severity: Medium
CVSS v2
Risk Factor: Medium
Base Score: 6.8
Temporal Score: 5
Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N
CVSS Score Source: CVE-2024-56515
CVSS v3
Risk Factor: Medium
Base Score: 6.5
Temporal Score: 5.7
Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C
Vulnerability Information
Exploit Ease: No known exploits are available
Patch Publication Date: 1/16/2025
Vulnerability Publication Date: 1/16/2025
Reference Information
CVE: CVE-2024-56515