CVE-2025-1057 is a vulnerability identified in Keylime, a remote attestation framework used to verify the integrity of systems remotely. The flaw arises from a strict type checking enforcement introduced in version 7.12.0 of Keylime. Previously, in versions such as 7.11.0, agent registration data was stored as bytes in the database. However, the updated registrar component in 7.12.0 expects this data to be in string format (str). This mismatch in data types causes the registrar to throw exceptions when attempting to read or process agent registration entries created by older versions. Consequently, agents fail to register or communicate properly with the registrar, leading to a denial of service condition for remote attestation operations. The vulnerability does not directly compromise confidentiality or integrity but impacts availability by preventing successful agent registration and attestation. The CVSS 3.1 base score is 4.3 (medium severity), reflecting that the attack vector is network-based, requires no privileges, but does require user interaction (e.g., an agent attempting to register). There are no known exploits in the wild as of the published date, and no patches or mitigations have been explicitly linked yet. This issue primarily affects environments that upgrade to Keylime 7.12.0 without migrating or converting legacy database entries, causing operational disruptions in remote attestation workflows.

For European organizations relying on Keylime for remote attestation—commonly used in cloud infrastructure, edge computing, and IoT security—the vulnerability can disrupt the integrity verification process of critical systems. This disruption can lead to denial of service in attestation workflows, potentially delaying detection of compromised or untrusted agents. Organizations that perform continuous monitoring and trust validation of devices may face operational challenges, impacting compliance with security policies and regulatory requirements such as GDPR, which emphasize system integrity and availability. While the vulnerability does not allow unauthorized data access or modification, the inability to register agents can reduce overall security posture and increase risk exposure. This is particularly significant for sectors with stringent security needs like finance, healthcare, and critical infrastructure in Europe. Additionally, the disruption could hinder incident response processes that depend on attestation data, affecting timely threat detection and mitigation.

To mitigate this vulnerability, European organizations should: 1) Avoid upgrading to Keylime version 7.12.0 without first performing a thorough migration of existing agent registration data from bytes to string format to ensure compatibility. 2) Develop or use migration scripts/tools to convert legacy database entries to the expected string type before or immediately after upgrading. 3) Implement rigorous testing in staging environments to verify that agent registration and attestation workflows function correctly post-upgrade. 4) Monitor Keylime logs for exceptions related to type conversion errors to detect early signs of this issue. 5) Engage with the Keylime development community or vendor for official patches or updates that address backward compatibility. 6) Consider temporarily rolling back to version 7.11.0 if migration is not feasible immediately, to maintain operational continuity. 7) Document and communicate upgrade procedures and known issues to all relevant IT and security teams to prevent inadvertent disruptions. These steps go beyond generic patching advice by emphasizing data migration, testing, and operational continuity planning specific to this type conversion flaw.