GHSA-pfw4-xjgm-267c

    Dashboard / Vulnerabilities / GHSA-pfw4-xjgm-267c

    GHSA-pfw4-xjgm-267c

    Published: 15 Sept 2022Last Modified: 21 Aug 2024

    Summary: Dendrite signature checks not applied to some retrieved missing events

    Details: ### Impact Events retrieved from a remote homeserver using `/get_missing_events` did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. ### Patches The problem has been fixed in Dendrite 0.9.8. ### Workarounds There are no workarounds. ### Special thanks Tulir Asokan, who spotted the issue originally.

    References: https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c, https://nvd.nist.gov/vuln/detail/CVE-2022-39200, https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3, https://github.com/matrix-org/dendrite

    Affected packages

    Package

    Name: github.com/matrix-org/dendrite

    Purl: pkg:golang/github.com/matrix-org/dendrite

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -0.9.8

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    GHSA-pfw4-xjgm-267c | CVE-DB