{"dataType":"CVE_RECORD","dataVersion":"5.1","cveMetadata":{"state":"PUBLISHED","cveId":"CVE-2022-39251","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","dateUpdated":"2025-04-23T16:55:05.561Z","dateReserved":"2022-09-02T00:00:00.000Z","datePublished":"2022-09-28T00:00:00.000Z"},"containers":{"cna":{"title":"Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion","providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2022-10-31T00:00:00.000Z"},"descriptions":[{"lang":"en","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."}],"affected":[{"vendor":"matrix-org","product":"matrix-js-sdk","versions":[{"version":"< 19.7.0","status":"affected"}]}],"references":[{"url":"https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76"},{"url":"https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0"},{"url":"https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients"},{"url":"https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c"},{"name":"GLSA-202210-35","tags":["vendor-advisory"],"url":"https://security.gentoo.org/glsa/202210-35"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-322: Key Exchange without Entity Authentication","cweId":"CWE-322"}]},{"descriptions":[{"type":"CWE","lang":"en","description":"CWE-287: Improper Authentication","cweId":"CWE-287"}]}],"source":{"advisory":"GHSA-r48r-j8fx-mq2c","discovery":"UNKNOWN"}},"adp":[{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-03T12:00:43.351Z"},"title":"CVE Program Container","references":[{"url":"https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76","tags":["x_transferred"]},{"url":"https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0","tags":["x_transferred"]},{"url":"https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients","tags":["x_transferred"]},{"url":"https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c","tags":["x_transferred"]},{"name":"GLSA-202210-35","tags":["vendor-advisory","x_transferred"],"url":"https://security.gentoo.org/glsa/202210-35"}]},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2025-04-23T15:51:00.530252Z","id":"CVE-2022-39251","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2025-04-23T16:55:05.561Z"}}]}}