CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS
Percentile
60.7%
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.
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.
If you have any questions or comments about this advisory, e-mail us at [email protected].
Vendor | Product | Version | CPE |
---|---|---|---|
matrix-org | gomatrixserverlib | * | cpe:2.3:a:matrix-org:gomatrixserverlib:*:*:*:*:*:*:*:* |
matrix-org | dendrite | * | cpe:2.3:a:matrix-org:dendrite:*:*:*:*:*:*:*:* |
github.com/advisories/GHSA-grvv-h2f9-7v9c
github.com/matrix-org/gomatrixserverlib/commit/723fd495dde835d078b9f2074b6b62c06dea4575
github.com/matrix-org/gomatrixserverlib/security/advisories/GHSA-grvv-h2f9-7v9c
matrix.org/docs/guides/moderation/#power-levels
nvd.nist.gov/vuln/detail/CVE-2022-36009
pkg.go.dev/vuln/GO-2022-0952