Resource exhaustion in Element-hq Synapse
CVE-2024-31208
Synapse is an open-source Matrix homeserver. A remote Matrix user with malicious intent, sharing a room with Synapse instances before 1.105.1, can dispatch specially crafted events to exploit a weakness in the V2 state resolution algorithm…
EPSS: 0.015 (70.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Element-hq Synapse — versions < 1.105.1
- Matrix Synapse
- Fedoraproject Fedora — versions 38, 39, 40
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
- security-advisories@github.com (Patch, x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC, Release Notes)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Mailing List, Third Party Advisory)
- security-advisories@github.com (Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2024-31208?
- CVE-2024-31208 is a medium-severity vulnerability in Element-hq Synapse, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 6.5/10. Published 2024-04-23.
- How severe is CVE-2024-31208?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2024-31208 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.