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4 vulnerabilities found for dendrite by matrix
CVE-2022-39200 (GCVE-0-2022-39200)
Vulnerability from nvd – Published: 2022-09-12 20:10 – Updated: 2025-04-23 17:12
VLAI
Title
Signature checks not applied to some retrieved missing events
Summary
Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/dendrite/security/a… | x_refsource_CONFIRM |
| https://github.com/matrix-org/dendrite/commit/279… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | dendrite |
Affected:
< 0.9.8
|
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CVE-2022-36009 (GCVE-0-2022-36009)
Vulnerability from nvd – Published: 2022-08-19 20:35 – Updated: 2025-04-23 17:48
VLAI
Title
Incorrect parsing of access level in gomatrixserverlib and dendrite
Summary
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.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/gomatrixserverlib/s… | x_refsource_CONFIRM |
| https://github.com/matrix-org/gomatrixserverlib/c… | x_refsource_MISC |
| https://matrix.org/docs/guides/moderation/#power-levels | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | gomatrixserverlib |
Affected:
< 0.9.3 for dendrite
Affected: < 723fd49 for gomatrixserverlib |
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CVE-2022-39200 (GCVE-0-2022-39200)
Vulnerability from cvelistv5 – Published: 2022-09-12 20:10 – Updated: 2025-04-23 17:12
VLAI
Title
Signature checks not applied to some retrieved missing events
Summary
Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.
Severity
7.3 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-347 - Improper Verification of Cryptographic Signature
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/dendrite/security/a… | x_refsource_CONFIRM |
| https://github.com/matrix-org/dendrite/commit/279… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | dendrite |
Affected:
< 0.9.8
|
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CVE-2022-36009 (GCVE-0-2022-36009)
Vulnerability from cvelistv5 – Published: 2022-08-19 20:35 – Updated: 2025-04-23 17:48
VLAI
Title
Incorrect parsing of access level in gomatrixserverlib and dendrite
Summary
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.
Severity
5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-863 - Incorrect Authorization
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/matrix-org/gomatrixserverlib/s… | x_refsource_CONFIRM |
| https://github.com/matrix-org/gomatrixserverlib/c… | x_refsource_MISC |
| https://matrix.org/docs/guides/moderation/#power-levels | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | gomatrixserverlib |
Affected:
< 0.9.3 for dendrite
Affected: < 723fd49 for gomatrixserverlib |
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