Upstream information
Description
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.SUSE information
Overall state of this security issue: Resolved
This issue is currently rated as having moderate severity.
| CNA (GitHub) | |
|---|---|
| Base Score | 6.8 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:N/A:N |
| Attack Vector | Network |
| Attack Complexity | Low |
| Privileges Required | Low |
| User Interaction | Required |
| Scope | Changed |
| Confidentiality Impact | High |
| Integrity Impact | None |
| Availability Impact | None |
| CVSSv3 Version | 3.1 |
SUSE Security Advisories:
- SUSE-SU-2025:0297-1, published 2025-01-30T14:03:41Z
List of released packages
| Product(s) | Fixed package version(s) | References |
|---|---|---|
| SUSE Linux Enterprise Module for Package Hub 15 SP6 |
| Patchnames: SUSE-SLE-Module-Packagehub-Subpackages-15-SP6-2025-297 |
| openSUSE Leap 15.6 |
| Patchnames: openSUSE-SLE-15.6-2025-297 |
| openSUSE Tumbleweed |
| Patchnames: openSUSE-Tumbleweed-2025-14704 |
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification. The updates are grouped by state of their lifecycle. SUSE product lifecycles are documented on the lifecycle page.
| Product(s) | Source package | State |
|---|---|---|
| Products under general support and receiving all security fixes. | ||
| SUSE Linux Enterprise Module for Package Hub 15 SP5 | govulncheck-vulndb | Affected |
| SUSE Linux Enterprise Module for Package Hub 15 SP6 | govulncheck-vulndb | Released |
| openSUSE Leap 15.6 | govulncheck-vulndb | Released |
| Products past their end of life and not receiving proactive updates anymore. | ||
| openSUSE Leap 15.5 | govulncheck-vulndb | Affected |
SUSE Timeline for this CVE
CVE page created: Thu Jan 16 22:01:11 2025CVE page last modified: Thu Jan 30 20:03:08 2025