matrix-js-sdk subject to impersonated messages due to permissive key forwarding

Description

An attacker cooperating with a malicious homeserver can construct messages appearing to have come from another person. Such messages will be marked with a grey shield on some platforms, but this may be missing in others.

This attack is possible due to the matrix-js-sdk implementing a too permissive key forwarding strategy on the receiving end.

Recommendation

Update the matrix-js-sdk package to the latest compatible version. Followings are version details:

• Affected version(s): < 19.7.0
• Patched version(s): 19.7.0

References

• GHSA-6263-x97c-c4gg
• matrix.org
• security.gentoo.org
• CVE-2022-39249
• CWE-287
• CAPEC-310
• OWASP 2021-A6
• OWASP 2021-A7

Related Issues

• matrix-js-sdk subject to user impersonation due to key/device identifier confusion in SAS verification - CVE-2022-39250
• matrix-js-sdk subject to user spoofing via Olm/Megolm protocol confusion - CVE-2022-39251
• Improper beacon events in matrix-js-sdk can result in availability issues - CVE-2022-39236
• Matrix JavaScript SDK's key history sharing could share keys to malicious devices - CVE-2024-47080

Tags:

npm

matrix-js-sdk