CVE-2022-36009

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Source
https://cve.org/CVERecord?id=CVE-2022-36009
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-36009.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2022-36009
Aliases
Published
2022-08-19T20:35:09Z
Modified
2026-10-22T02:48:48Z
Severity
  • 5.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
Summary
Incorrect parsing of access level in gomatrixserverlib and dendrite
Details

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.

Database specific 
{
    "cna_assigner":  "GitHub_M",
    "cwe_ids":  [
        "CWE-863"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/36xxx/CVE-2022-36009.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "fixed":  "0.9.3fordendrite"
                        },
                        {
                            "fixed":  "723fd49forgomatrixserverlib"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StringRangeExpression"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/matrix-org/gomatrixserverlib

Affected ranges

Type
GIT
Repo
https://github.com/matrix-org/gomatrixserverlib
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
723fd495dde835d078b9f2074b6b62c06dea4575
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "fixed":  "723fd495dde835d078b9f2074b6b62c06dea4575"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-36009.json"