CVE-2022-36111 in immudb Client SDK
Summary
by MITRE • 11/23/2022
immudb is a database with built-in cryptographic proof and verification. In versions prior to 1.4.1, a malicious immudb server can provide a falsified proof that will be accepted by the client SDK signing a falsified transaction replacing the genuine one. This situation can not be triggered by a genuine immudb server and requires the client to perform a specific list of verified operations resulting in acceptance of an invalid state value. This vulnerability only affects immudb client SDKs, the immudb server itself is not affected by this vulnerability. This issue has been patched in version 1.4.1.
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Analysis
by VulDB Data Team • 12/21/2022
The vulnerability identified as CVE-2022-36111 represents a critical flaw in the immudb database system's client-side verification mechanisms. This issue specifically affects client software that implements cryptographic proof verification for database transactions, creating a scenario where malicious actors could potentially manipulate transaction data without detection. The vulnerability stems from an insufficient validation process within the client SDK that allows for the acceptance of falsified cryptographic proofs. The immudb system is designed to provide tamper-proof data storage through cryptographic proofs that enable clients to verify the integrity of database transactions, making this flaw particularly concerning for systems relying on its security guarantees.
The technical implementation flaw occurs when a malicious immudb server provides falsified proof data that the client SDK incorrectly accepts as valid. This vulnerability exploits a specific sequence of verified operations within the client software that results in the acceptance of an invalid state value. The flaw does not originate from the server itself but rather from how client SDKs process and validate cryptographic proofs during transaction verification. The vulnerability requires a particular combination of client-side operations to be triggered, making it difficult to exploit through automated means but still potentially dangerous when the specific conditions are met. This represents a weakness in the client-side validation logic that fails to properly distinguish between genuine and falsified cryptographic proofs.
The operational impact of this vulnerability extends beyond simple data integrity concerns to potentially compromise the entire security model of systems relying on immudb's cryptographic guarantees. When exploited, this vulnerability could allow attackers to replace genuine transactions with falsified ones while maintaining the appearance of validity through the cryptographic proof mechanism. The affected client SDKs would incorrectly accept these falsified transactions, undermining the core principle of immudb's security model that ensures data immutability and authenticity. This vulnerability directly impacts the trust model that organizations rely on when implementing immudb for secure data storage solutions, potentially enabling unauthorized data manipulation without detection by the client applications.
Mitigation efforts should focus on immediate upgrade to immudb version 1.4.1 or later, which contains the necessary patches to address the cryptographic proof validation issue. Organizations should also implement monitoring systems to detect unusual transaction patterns that might indicate exploitation attempts, though such detection would be challenging given the subtle nature of the vulnerability. The fix addresses the specific validation logic that was allowing falsified proofs to be accepted, ensuring that client SDKs properly verify cryptographic proofs against the expected transaction state values. Security teams should also conduct thorough reviews of their immudb client implementations to ensure no custom modifications might introduce similar validation weaknesses. This vulnerability highlights the importance of rigorous cryptographic validation in distributed database systems and demonstrates how subtle flaws in verification logic can compromise entire security architectures, aligning with common attack patterns documented in the attack framework such as those targeting cryptographic validation mechanisms.