SB2023052215 - Denial of service in Matrix Synapse
Published: May 22, 2023
Security Bulletin ID
SB2023052215
Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) Uncontrolled Recursion (CVE-ID: CVE-2022-31052)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to an uncontrolled recursion when handling URL previews. A remote attacker can pass a specially crafted web page to the application and perform a denial of service (DoS) attack.
Remediation
Install update from vendor's website.
References
- https://github.com/matrix-org/synapse/security/advisories/GHSA-22p3-qrh9-cx32
- https://spec.matrix.org/v1.2/client-server-api/#get_matrixmediav3preview_url
- https://github.com/matrix-org/synapse/commit/fa1308061802ac7b7d20e954ba7372c5ac292333
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QGSDQ4YAITCUACAB7SXQZDJIU3IQ4CJD/
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7EARKKJZ2W7WUITFDT4EG4NVATFYJQHF/