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    1 vulnerability by matrix-nio_project

    CVE-2022-39254 (GCVE-0-2022-39254)

    Vulnerability from cvelistv5 – Published: 2022-09-29 14:35 – Updated: 2025-04-23 16:53
    VLAI
    Title
    When matrix-nio receives forwarded room keys, the receiver doesn't check if it requested the key from the forwarder
    Summary
    matrix-nio is a Python Matrix client library, designed according to sans I/O principles. Prior to version 0.20, when a users requests a room key from their devices, the software correctly remember the request. Once they receive a forwarded room key, they accept it without checking who the room key came from. This allows homeservers to try to insert room keys of questionable validity, potentially mounting an impersonation attack. Version 0.20 fixes the issue.
    Severity
    8.6 (High)
    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-322 - Key Exchange without Entity Authentication
    • CWE-287 - Improper Authentication
    Assigner
    References
    Impacted products
    Vendor Product Version
    poljar matrix-nio Affected: < 0.20
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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