CVE-2022-39251
- Source
- https://cve.org/CVERecord?id=CVE-2022-39251
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-39251.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2022-39251
- Aliases
- Downstream
CLEANSTART (1)
DEBIAN (1)
MGASA (1)
RLSA (1)
SUSE (1)
UBUNTU (1)
- Related
- Published
- 2022-09-28T00:00:00Z
- Modified
- 2026-10-21T02:30:37Z
- Severity
-
- 8.6 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:N CVSS Calculator
- Summary
- Matrix Javascript SDK vulnerable to Olm/Megolm protocol confusion
- Details
-
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.
- Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-287", "CWE-322" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39251.json" }- References
-
- https://github.com/matrix-org/matrix-js-sdk/releases/tag/v19.7.0
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/39xxx/CVE-2022-39251.json
- https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-r48r-j8fx-mq2c
- https://nvd.nist.gov/vuln/detail/CVE-2022-39251
- https://security.gentoo.org/glsa/202210-35
- https://github.com/matrix-org/matrix-js-sdk/commit/a587d7c36026fe1fcf93dfff63588abee359be76
- https://matrix.org/blog/2022/09/28/upgrade-now-to-address-encryption-vulns-in-matrix-sdks-and-clients
Affected packages
Git / github.com/matrix-org/matrix-js-sdk
Affected ranges
- Type
- GIT
- Repo
- https://github.com/matrix-org/matrix-js-sdk
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixedFixed
- Database specific
-
Show details
{ "extracted_events": [ { "cpe": "cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:node.js:*:*", "range": [ { "introduced": "0" }, { "fixed": "19.7.0" } ], "source": "CPE_RANGE" }, { "range": [ { "fixed": "a587d7c36026fe1fcf93dfff63588abee359be76" } ], "source": "REFERENCES_COMMIT" }, { "original_tag": "v19.7.0", "range": [ { "fixed": "2d067ad95778b26aed24b801be0951e215c3ac8c" } ], "source": "REFERENCES_TAG" } ] }