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CVE-2021-29453

Type: 
Uncontrolled Resource Consumption ('Resource Exhaustion')
Severity: 
Medium
Publication date: 
04/19/2021
Last modified: 
04/28/2021
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.
Impact
Access Vector: Through network
Access Complexity: Low
Authentication: Requires a single instance to exploit
Impact Type: No impact on system integrity + No impact on system confidentiality + Partially affects on system availability
Vulnerable software and versions
  • cpe:2.3:a:matrix-media-repo_project:matrix-media-repo:*:*:*:*:*:*:*:*
To consult the complete list of products and versions see this page
Explanation of fields