Description
gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level. In rooms where the `"events_default"` power level had been changed, this could result in events either being incorrectly authorised or rejected by Dendrite servers. gomatrixserverlib contains a fix as of commit `723fd49` and Dendrite 0.9.3 has been updated accordingly. Matrix rooms where the `"events_default"` power level has not been changed from the default of zero are not vulnerable. Users are advised to upgrade. There are no known workarounds for this issue.
No analysis available yet.
Remediation
No remediation available yet.
Tracking
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Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2022-6558 | gomatrixserverlib is a Go library for matrix protocol federation. Dendrite is a Matrix homeserver written in Go, an alternative to Synapse. The power level parsing within gomatrixserverlib was failing to parse the `"events_default"` key of the `m.room.power_levels` event, defaulting the event default power level to zero in all cases. Power levels are the matrix terminology for user access level. In rooms where the `"events_default"` power level had been changed, this could result in events either being incorrectly authorised or rejected by Dendrite servers. gomatrixserverlib contains a fix as of commit `723fd49` and Dendrite 0.9.3 has been updated accordingly. Matrix rooms where the `"events_default"` power level has not been changed from the default of zero are not vulnerable. Users are advised to upgrade. There are no known workarounds for this issue. |
Github GHSA |
GHSA-grvv-h2f9-7v9c | gomatrixserverlib and Dendrite vulnerable to incorrect parsing of the event default power level in event auth |
References
History
Wed, 23 Apr 2025 18:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
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ssvc
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Status: PUBLISHED
Assigner: GitHub_M
Published:
Updated: 2025-04-23T17:48:13.250Z
Reserved: 2022-07-15T00:00:00.000Z
Link: CVE-2022-36009
Updated: 2024-08-03T09:51:59.794Z
Status : Modified
Published: 2022-08-19T21:15:08.547
Modified: 2024-11-21T07:12:10.440
Link: CVE-2022-36009
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD
Github GHSA