GitHub Advisory DatabaseGHSA-5CHR-WJW5-3GQ4matrix-synapse vulnerable to denial of service due to malicious server ACL events
4.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
49.0%
Impact
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.
Patches
Server administrators are advised to upgrade to Synapse 1.94.0 or later.
Workarounds
Rooms with malicious server ACL events can be purged and blocked using the admin API.
Affected configurations
| CPE | Name | Operator | Version |
|---|---|---|---|
| matrix-synapse | lt | 1.94.0 |
References
github.com/advisories/GHSA-5chr-wjw5-3gq4
github.com/matrix-org/synapse/commit/f84da3c32ec74cf054e2fd6d10618aa4997cffaa
github.com/matrix-org/synapse/pull/16360
github.com/matrix-org/synapse/security/advisories/GHSA-5chr-wjw5-3gq4
github.com/pypa/advisory-database/tree/main/vulns/matrix-synapse/PYSEC-2023-199.yaml
lists.fedoraproject.org/archives/list/[email protected]/message/KEVRB4MG5UXQ5RLZHSUJXM5GWEBYYS5B/
lists.fedoraproject.org/archives/list/[email protected]/message/N6P4QULVUE254WI7XF2LWWOGHCYVFXFY/
lists.fedoraproject.org/archives/list/[email protected]/message/WRO4MPQ6HOXIUZM6RJP6VTCTMV7RD2T3/
matrix-org.github.io/synapse/latest/admin_api/rooms.html#version-2-new-version
nvd.nist.gov/vuln/detail/CVE-2023-45129
security.gentoo.org/glsa/202401-12
Related
4.9 Medium
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
0.001 Low
EPSS
Percentile
49.0%