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keylime@7.4.0 vulnerabilities

TPM-based key bootstrapping and system integrity measurement system for cloud

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Direct Vulnerabilities

Known vulnerabilities in the keylime package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability Vulnerable Version
  • M
Authorization Bypass Through User-Controlled Key

keylime is a TPM-based key bootstrapping and system integrity measurement system for cloud

Affected versions of this package are vulnerable to Authorization Bypass Through User-Controlled Key via the registrar code, which allows an attacker to effectively bypass the challenge-response protocol used to verify that an agent has indeed access to an AIK, which in indeed related to the EK. When receiving the wrong auth_tag back from the agent during activation, the registrar answers with an error message containing the expected correct auth_tag (an HMAC calculated within the registrar for checking), which the attacker then uses.

How to fix Authorization Bypass Through User-Controlled Key?

Upgrade keylime to version 7.5.0 or higher.

[,7.5.0)
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