CVE-2021-29453 Information

Description

matrix-media-repo is an open-source multi-domain media repository for Matrix. Versions 1.2.6 and earlier of matrix-media-repo do not properly handle malicious images which are crafted to be small in file size but large in complexity. A malicious user could upload a relatively small image in terms of file size using particular image formats which expands to have extremely large dimensions during the process of thumbnailing. The server can be exhausted of memory in the process of trying to load the whole image into memory for thumbnailing leading to denial of service. Version 1.2.7 has a fix for the vulnerability.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

https://hub.docker.com/r/turt2live/matrix-media-repo/tags?page=1&ordering=last_updated https://github.com/turt2live/matrix-media-repo/releases/tag/v1.2.7 https://github.com/turt2live/matrix-media-repo/security/advisories/GHSA-j889-h476-hh9h

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

6.5