High severity · published Dec 3, 2024
CVE-2024-52805
Synapse allows unsupported content types to lead to memory exhaustion
7.5
CVSS
0.7%
EPSS
No
On KEV
Description
Synapse is an open-source Matrix homeserver. In Synapse before 1.120.1, multipart/form-data requests can in certain configurations transiently increase memory consumption beyond expected levels while processing the request, which can be used to amplify denial of service attacks. Synapse 1.120.1 resolves the issue by denying requests with unsupported multipart/form-data content type.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 54% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SY
synapse · element-hq
< 1.120.1 · source: vendor, NVD, CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2024-52805
CVE.org
https://www.cve.org/CVERecord?id=CVE-2024-52805
Vendor Advisory
https://github.com/element-hq/synapse/security/advisories/GHSA-rfq8-j7rh-8hf2
Issue Tracking
https://github.com/twisted/twisted/issues/4688#issuecomment-1167705518
Issue Tracking
https://github.com/twisted/twisted/issues/4688#issuecomment-2385711609
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