matrix-synapse vulnerable to denial of service due to malicious server ACL events
Published Oct 10, 2023
6.9
MEDIUMCVSS 4.0
EPSS 1.17%
Description
Synapse is an open-source Matrix homeserver written and maintained by the Matrix.org Foundation. Prior to version 1.94.0, a malicious server ACL event can impact performance temporarily or permanently leading to a persistent denial of service. Homeservers running on a closed federation (which presumably do not need to use server ACLs) are not affected. Server administrators are advised to upgrade to Synapse 1.94.0 or later. As a workaround, rooms with malicious server ACL events can be purged and blocked using the admin API.
Affected products
-
- Version < 1.94.0StatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Matrix-Org | Synapse | n/a |
|
Configuration 2
- 37
- 38
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Red Hat statement
Red Hat nor Fedora ship matrix-org/Synapse
References (14)
- https://access.redhat.com/security/cve/CVE-2023-45129 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2243128 Issue Tracking
- https://github.com/advisories/GHSA-5chr-wjw5-3gq4 Advisory
- https://github.com/matrix-org/synapse/commit/f84da3c32ec74cf054e2fd6d10618aa4997cffaa
- https://github.com/matrix-org/synapse/pull/16360 x_refsource_MISCPatchVendor Advisory
- https://github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4 x_refsource_CONFIRMVendor Advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-199.yaml
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B Mailing List
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3 Mailing List
- https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version x_refsource_MISCRelease Notes
- https://nvd.nist.gov/vuln/detail/CVE-2023-45129
- https://security.gentoo.org/glsa/202401-12
- https://www.cve.org/CVERecord?id=CVE-2023-45129
Change history (0)
No recorded changes yet.