Overview
- 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.
- Source
- security-advisories@github.com
- NVD status
- Analyzed
Risk scores
CVSS 3.1
- Type
- Primary
- Base score
- 8.8
- Impact score
- 5.9
- Exploitability score
- 2.8
- Vector string
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Severity
- HIGH
Weaknesses
- security-advisories@github.com
- CWE-863
Social media
- Hype score
- Not currently trending
Configurations
[
{
"nodes": [
{
"negate": false,
"cpeMatch": [
{
"criteria": "cpe:2.3:a:matrix:dendrite:*:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "D4C9DAFC-C2A1-4542-832C-115A0FB6BBCA",
"versionEndIncluding": "0.9.2"
},
{
"criteria": "cpe:2.3:a:matrix:gomatrixserverlib:-:*:*:*:*:*:*:*",
"vulnerable": true,
"matchCriteriaId": "8056D6A6-8A54-4D66-81A9-D9E39CEED6AF"
}
],
"operator": "OR"
}
]
}
]