When matrix-rust-sdk recieves forwarded room keys, the reciever doesn't check if it requested the key from the forwarder
CVE-2022-39252

8.6HIGH

Key Information:

Vendor

Matrix-org

Status
Matrix-rust-sdk
Vendor
CVE Published:
29 September 2022

What is CVE-2022-39252?

matrix-rust-sdk is an implementation of a Matrix client-server library in Rust, and matrix-sdk-crypto is the Matrix encryption library. Prior to version 0.6, when a user requests a room key from their devices, the software correctly remembers the request. When the user receives a forwarded room key, the software accepts 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 0.6 fixes this issue.

Affected Version(s)

matrix-rust-sdk < 0.6

References

https://github.com/matrix-org/matrix-rust-sdk/security/ad...
x_refsource_CONFIRM
https://github.com/matrix-org/matrix-rust-sdk/commit/093f...
x_refsource_MISC
https://github.com/matrix-org/matrix-rust-sdk/commit/4144...
x_refsource_MISC

CVSS V3.1

Score:
8.6
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.