Decoded: Small Business Cybersecurity News & Insights

matrix-sdk-crypto (Rust) Before v0.8.0 – Identity Verification Flaw

Published Date: January 7, 2025

Package Affected Versions Patched Versions Severity
📦 matrix-sdk-crypto (Rust) < 0.8.0 0.8.0 Moderate

Description

In versions of matrix-sdk-crypto before 0.8.0, there’s no clear mechanism to notify when a user’s cryptographic identity changes from verified to unverified. This could cause client applications using the SDK to miss such changes, potentially resulting in security oversights.

Impact:


Without proper signaling of identity changes, client applications might continue treating an unverified identity as verified. This could compromise the integrity of encrypted communications.

Patches & Workarounds

Upgrade to matrix-sdk-crypto version 0.8.0.
This version introduces the VerificationLevel::VerificationViolation enum variant. It explicitly signals when a previously verified cryptographic identity becomes unverified, allowing client applications to handle the situation correctly.



Recommendation:


Update your dependencies:

[dependencies]
matrix-sdk-crypto = "0.8.0"


After updating, ensure your application correctly handles the VerificationViolation variant to maintain secure communication.

References

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