Ubuntu.comUB:CVE-2023-43796CVE-2023-43796
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
44.0%
Synapse is an open-source Matrix homeserver Prior to versions 1.95.1 and
1.96.0rc1, 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 or 1.96.0rc1 to receive a patch. As a workaround, the
federation_domain_whitelist can be used to limit federation traffic with
a homeserver.
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| ubuntu | 18.04 | noarch | matrix-synapse | < any | UNKNOWN |
| ubuntu | 20.04 | noarch | matrix-synapse | < any | UNKNOWN |
| ubuntu | 22.04 | noarch | matrix-synapse | < any | UNKNOWN |
| ubuntu | 23.10 | noarch | matrix-synapse | < any | UNKNOWN |
| ubuntu | 24.04 | noarch | matrix-synapse | < any | UNKNOWN |
References
github.com/matrix-org/synapse/commit/daec55e1fe120c564240c5386e77941372bf458f (v1.95.1)
github.com/matrix-org/synapse/security/advisories/GHSA-mp92-3jfm-3575
launchpad.net/bugs/cve/CVE-2023-43796
nvd.nist.gov/vuln/detail/CVE-2023-43796
security-tracker.debian.org/tracker/CVE-2023-43796
www.cve.org/CVERecord?id=CVE-2023-43796
Related
5.3 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
5 Medium
AI Score
Confidence
High
0.001 Low
EPSS
Percentile
44.0%