cve-2022-39251
Vulnerability from cvelistv5
Published
2022-09-28 00:00
Modified
2024-08-03 12:00
Summary
Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion
Impacted products
matrix-orgmatrix-js-sdk
Show details on NVD website


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            "url": "https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76"
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          {
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            "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
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            "url": "https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients"
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            "url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c"
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            "name": "GLSA-202210-35",
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          "value": "Matrix Javascript SDK is the Matrix Client-Server SDK for JavaScript. Prior to version 19.7.0, an attacker cooperating with a malicious homeserver can construct messages that legitimately appear to have come from another person, without any indication such as a grey shield. Additionally, a sophisticated attacker cooperating with a malicious homeserver could employ this vulnerability to perform a targeted attack in order to send fake to-device messages appearing to originate from another user. This can allow, for example, to inject the key backup secret during a self-verification, to make a targeted device start using a malicious key backup spoofed by the homeserver. These attacks are possible due to a protocol confusion vulnerability that accepts to-device messages encrypted with Megolm instead of Olm. Starting with version 19.7.0, matrix-js-sdk has been modified to only accept Olm-encrypted to-device messages. Out of caution, several other checks have been audited or added. This attack requires coordination between a malicious home server and an attacker, so those who trust their home servers do not need a workaround."
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            "attackVector": "NETWORK",
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            "userInteraction": "NONE",
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          "url": "https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"
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      "source": {
        "advisory": "GHSA-r48r-j8fx-mq2c",
        "discovery": "UNKNOWN"
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      "title": "Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion"
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    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2022-39251",
    "datePublished": "2022-09-28T00:00:00",
    "dateReserved": "2022-09-02T00:00:00",
    "dateUpdated": "2024-08-03T12:00:43.351Z",
    "state": "PUBLISHED"
  },
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