CVE-2020-4596

Vulnerability

IBM Security Guardium Insights version 2.0.2 uses weaker than expected cryptographic algorithms, as described in the vendor advisory [1]. This flaw resides in the cryptographic implementation used to protect sensitive data at rest or in transit. The condition is reachable by default, as the product ships with these insufficiently strong algorithms applied to data encryption.

Exploitation

An attacker with network access to the system could potentially exploit this vulnerability by intercepting or accessing encrypted data and then applying cryptanalytic techniques to break the weakened encryption [1]. The attack requires high complexity due to the need for specific cryptographic knowledge and potentially significant computational resources. No authentication is required, but the attacker must be able to observe or obtain the encrypted data.

Impact

Successful exploitation could allow the attacker to decrypt highly sensitive information, leading to a complete compromise of confidentiality [1]. The CIA impact is limited to data disclosure; integrity and availability are not directly affected. The attacker gains access to protected data but does not achieve code execution or elevated privileges within the system.

Mitigation

IBM has released a fix as part of Guardium Insights version 2.0.3, which addresses this vulnerability by implementing stronger cryptographic algorithms [1]. Users should upgrade to version 2.0.3 or later. If immediate upgrade is not possible, restrict network access to the Guardium Insights service and monitor for unauthorized data access.