CVE-2024-31208
Description
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. This can induce high CPU consumption and accumulate excessive data in the database of such instances, resulting in a denial of service. Servers in private federations, or those that do not federate, are not affected. Server administrators should upgrade to 1.105.1 or later. Some workarounds are available. One can ban the malicious users or ACL block servers from the rooms and/or leave the room and purge the room using the admin API.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
matrix-synapsePyPI | < 1.105.1 | 1.105.1 |
Affected products
7cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*+ 2 more
- cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:40:*:*:*:*:*:*:*
- ghsa-coords2 versions
< 1.105.1+ 1 more
- (no CPE)range: < 1.105.1
- (no CPE)range: < 1.105.1-1.1
- Range: < 1.105.1
Patches
Vulnerability mechanics
References
12- github.com/element-hq/synapse/commit/55b0aa847a61774b6a3acdc4b177a20dc019f01anvdPatchWEB
- github.com/advisories/GHSA-3h7q-rfh9-xm4vghsaADVISORY
- github.com/element-hq/synapse/security/advisories/GHSA-3h7q-rfh9-xm4vnvdVendor AdvisoryWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVB/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3K/nvdMailing ListThird Party Advisory
- lists.fedoraproject.org/archives/list/[email protected]/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DET/nvdMailing ListThird Party Advisory
- nvd.nist.gov/vuln/detail/CVE-2024-31208ghsaADVISORY
- github.com/element-hq/synapse/releases/tag/v1.105.1nvdRelease NotesWEB
- github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2024-50.yamlghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/R6FCCO4ODTZ3FDS7TMW76PKOSEL2TQVBghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/RR53FNHV446CB37TP45GZ6F6HZLZCK3KghsaWEB
- lists.fedoraproject.org/archives/list/[email protected]/message/VSF4NJJSTSQRJQ47PLYYSCFYKJBP7DETghsaWEB
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