Incorrect parsing of access level in gomatrixserverlib and dendrite
Published Aug 19, 2022
8.8
HIGHCVSS 3.1
EPSS 0.82%
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.
Affected products
-
- Version < 0.9.3 for dendriteStatusaffectedConstraints-
- Version < 723fd49 for gomatrixserverlibStatusaffectedConstraints-
- 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 | Gomatrixserverlib | n/a |
|
- ≤ 0.9.2
- n/a
No data.
No Red Hat product state for this CVE.
github.com/matrix-org/gomatrixserverlib
Go
Introduced 0 Fixed 0.0.0-20220815091947-723fd495dde8github.com/matrix-org/dendrite
Go
Introduced 0 Fixed 0.9.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| Go | github.com/matrix-org/gomatrixserverlib | 0 | 0.0.0-20220815091947-723fd495dde8 |
| Go | github.com/matrix-org/dendrite | 0 | 0.9.3 |
Remediation
No remediation recorded yet.
References (6)
- https://github.com/advisories/GHSA-grvv-h2f9-7v9c Advisory
- https://github.com/matrix-org/gomatrixserverlib/commit/723fd495dde835d078b9f2074b6b62c06dea4575 x_refsource_MISCPatchThird Party Advisory
- https://github.com/matrix-org/gomatrixserverlib/security/advisories/GHSA-grvv-h2f9-7v9c x_refsource_CONFIRMThird Party Advisory
- https://matrix.org/docs/guides/moderation/#power-levels x_refsource_MISCVendor Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2022-36009
- https://pkg.go.dev/vuln/GO-2022-0952
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-grvv-h2f9-7v9c | Advisory | |
| https://github.com/matrix-org/gomatrixserverlib/commit/723fd495dde835d078b9f2074b6b62c06dea4575 | x_refsource_MISCPatchThird Party Advisory | |
| https://github.com/matrix-org/gomatrixserverlib/security/advisories/GHSA-grvv-h2f9-7v9c | x_refsource_CONFIRMThird Party Advisory | |
| https://matrix.org/docs/guides/moderation/#power-levels | x_refsource_MISCVendor Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2022-36009 | ||
| https://pkg.go.dev/vuln/GO-2022-0952 |
Change history (0)
No recorded changes yet.