CVE-2023-43796Medium· 5.3▾ SunlitSynapse vulnerable to leak of remote user device information
▾ Sunlit zone — Low / medium · no exploitation signal
impact 29.2 · likelihood 0.2 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
Last analysed / modified upstream
0.9%
Cached device information of remote users can be queried from Synapse. This can be used to enumerate the remote users known to a homeserver.
System administrators are encouraged to upgrade to Synapse 1.95.1 as soon as possible.
The federation_domain_whitelist can be used to limit federation traffic with a homeserver.
matrix-synapse < 1.95.1Upgrade to a patched release:
matrix-synapse 1.95.1Connected by shared product, vendor, weakness, or advisory.
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