Reported

July 18, 2024

Issued

July 19, 2024

Package

matrix-sdk-crypto (crates.io)

Type

Vulnerability

Categories

• crypto-failure

Aliases

• CVE-2024-40648
• GHSA-4qg4-cvh2-crgg

References

• https://github.com/matrix-org/matrix-rust-sdk/security/advisories/GHSA-4qg4-cvh2-crgg

Patched

• >=0.7.2

Affected Functions

Version

matrix_sdk_crypto::UserIdentity::is_verified

• <0.7.2

Description

The UserIdentity::is_verified() method in the matrix-sdk-crypto crate before version 0.7.2 doesn't take into account the verification status of the user's own identity while performing the check and may as a result return a value contrary to what is implied by its name and documentation.

Impact

If the method is used to decide whether to perform sensitive operations towards a user identity, a malicious homeserver could manipulate the outcome in order to make the identity appear trusted. This is not a typical usage of the method, which lowers the impact. The method itself is not used inside the matrix-sdk-crypto crate.

Advisory available under CC0-1.0 license.