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alpinelinuxAlpine Linux Development TeamALPINE:CVE-2023-45129
HistoryOct 10, 2023 - 6:15 p.m.

CVE-2023-45129

2023-10-1018:15:19
Alpine Linux Development Team
security.alpinelinux.org
13
synapse
cve-2023-45129
denial of service
upgrade
version 1.94.0
admin api
performance impact

CVSS3

4.9

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

AI Score

5

Confidence

High

EPSS

0.002

Percentile

53.3%

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.

CVSS3

4.9

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

AI Score

5

Confidence

High

EPSS

0.002

Percentile

53.3%