In breve
- CVE-2022-36009 è una vulnerabilità ALTO (CVSS 8.8) che riguarda github.com/matrix-org/dendrite, github.com/matrix-org/gomatrixserverlib, dendrite (matrix).
- Probabilità di sfruttamento nei prossimi 30 giorni (EPSS): 0.83%, superiore al 57.7% delle vulnerabilità.
- Correzione: aggiornare a 0.9.3, 0.0.0-20220815091947-723fd495dde8 o successiva.
Description
Impact
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.
Patches
gomatrixserverlib contains a fix as of commit 723fd49 and Dendrite 0.9.3 has been updated accordingly.
Workarounds
Matrix rooms where the "events_default" power level has not been changed from the default of zero are not vulnerable.
For more information
If you have any questions or comments about this advisory, e-mail us at [email protected].
NVD 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.
Altre vulnerabilità di github.com/matrix-org/dendrite
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