x/vulndb: potential Go vuln in github.com/matrix-org/gomatrixserverlib: CVE-2022-36009

[GoVulnBot]

CVE-2022-36009 references github.com/matrix-org/gomatrixserverlib, which may be a Go module.

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.

Links:

• NIST: https://nvd.nist.gov/vuln/detail/CVE-2022-36009
• JSON: https://github.com/CVEProject/cvelist/tree/761fd3cbf6f1c94558aa8656a65034316aa69a43/2022/36xxx/CVE-2022-36009.json
• Commit: matrix-org/gomatrixserverlib@723fd49
• Imported by: https://pkg.go.dev/github.com/matrix-org/gomatrixserverlib?tab=importedby
• GHSA-grvv-h2f9-7v9c
• https://matrix.org/docs/guides/moderation/#power-levels

See doc/triage.md for instructions on how to triage this report.

packages:
  - module: github.com/matrix-org/gomatrixserverlib
    package: gomatrixserverlib
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.
cves:
  - CVE-2022-36009
links:
    commit: https://github.com/matrix-org/gomatrixserverlib/commit/723fd495dde835d078b9f2074b6b62c06dea4575
    context:
      - https://github.com/matrix-org/gomatrixserverlib/security/advisories/GHSA-grvv-h2f9-7v9c
      - https://matrix.org/docs/guides/moderation/#power-levels

[gopherbot]

Change https://go.dev/cl/425082 mentions this issue: x/vulndb: add data/reports/GO-2022-0952.yaml for CVE-2022-36009

[gopherbot]

Change https://go.dev/cl/425085 mentions this issue: x/vulndb: add data/reports/GO-2022-0952.yaml for CVE-2022-36009

[gopherbot]

Change https://go.dev/cl/427981 mentions this issue: data/reports: add missing ghsa in GO-2022-0952.yaml