Resource exhaustion in Matrix Synapse
CVE-2022-41952
Synapse before 1.52.0 with URL preview functionality enabled will attempt to generate URL previews for media stream URLs without properly limiting connection time. Connections will only be terminated after `max_spider_size` (default: 10M)…
Vulnerability class: DoS (Denial of Service)
EPSS: 0.008 (53.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L.
Affected products
- Matrix Synapse
- Matrix-org Synapse — versions < 1.53.0
Weakness classification (CWE)
References
- security-advisories@github.com (Third Party Advisory, Mitigation)
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory)
- security-advisories@github.com (Third Party Advisory, Release Notes)
- security-advisories@github.com (Third Party Advisory, Release Notes)
Frequently asked questions
- What is CVE-2022-41952?
- CVE-2022-41952 is a medium-severity vulnerability in Matrix Synapse, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2022-11-22.
- How severe is CVE-2022-41952?
- Medium severity. CVSS v3 base score is 6.5 out of 10.