Intel

AIKIDO-2024-10052

tuf is vulnerable to Improper Verification of Cryptographic Signature

Improper Verification of Cryptographic Signature Pre-CVE
Found by Aikido Intel before public disclosure or CVE publication.
Published Apr 24, 2024

10

Low Risk

This Affects:

pythontuf
2.0.0 - 3.1.0
Fixed in 3.1.1
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TL;DR

Vulnerable versions of this package lack proper verification of cryptographic signatures in the Targets.get_delegated_role process when using tuf.api.metadata. An attacker can manipulate the verification outcome by convincing a Metadata API user to invoke this process with a delegated_role argument that was not legitimately delegated by the Targets, while using succinct delegation. However, users following the typical client workflow are not affected, as the delegated role name comes from the trusted delegating Targets themselves. Additionally, the actual signature verification remains secure, as the verified metadata still requires correct signing by the keys specified in the delegating role.

Who does this affect?

You are affected if you are using a version that falls within the vulnerable range.

Background info

tuf is vulnerable to Improper Verification of Cryptographic Signature in versions 2.0.0 - 3.1.0.

How to fix this

Upgrade the tuf library to the patch version.