CVE-2021-29794 : Exploit Details and Defense Strategies

IBM Tivoli Netcool/Impact versions 7.1.0.20 and 7.1.0.21 are impacted by an insecure SSH server configuration that could potentially allow attackers to decrypt highly sensitive information. This vulnerability was published on July 9, 2021.

Understanding CVE-2021-29794

This CVE highlights a security issue in IBM Tivoli Netcool/Impact versions 7.1.0.20 and 7.1.0.21 related to weak cryptographic algorithms potentially enabling unauthorized access to sensitive data.

What is CVE-2021-29794?

CVE-2021-29794 exposes a vulnerability in the SSH server configuration of IBM Tivoli Netcool/Impact 7.1.0.20 and 7.1.0.21, allowing attackers to decrypt highly confidential information.

The Impact of CVE-2021-29794

The vulnerability poses a medium severity risk with a CVSS base score of 5.9, mainly affecting confidentiality, but with no impact on integrity or availability. No privileges are required for exploitation.

Technical Details of CVE-2021-29794

The vulnerability allows attackers to use weaker cryptographic algorithms via an insecure SSH server configuration in IBM Tivoli Netcool/Impact versions 7.1.0.20 and 7.1.0.21.

Vulnerability Description

IBM Tivoli Netcool/Impact versions 7.1.0.20 and 7.1.0.21 are vulnerable to attacks that could potentially decrypt sensitive information due to the usage of weak cryptographic algorithms.

Affected Systems and Versions

The affected versions include IBM Tivoli Netcool/Impact 7.1.0.20 and 7.1.0.21.

Exploitation Mechanism

Attackers can exploit this vulnerability through network access without requiring any specific privileges, potentially leading to the decryption of highly sensitive information.

Mitigation and Prevention

To address CVE-2021-29794, users are advised to take immediate steps and implement long-term security practices to mitigate risks associated with this vulnerability.

Immediate Steps to Take

Immediate steps include applying official fixes provided by IBM and monitoring network activities for any signs of unauthorized access.

Long-Term Security Practices

Employing robust encryption standards, restricting network access, and conducting regular security audits are crucial for long-term security against vulnerabilities like CVE-2021-29794.

Patching and Updates

Ensure that IBM Tivoli Netcool/Impact versions 7.1.0.20 and 7.1.0.21 are updated with the latest patches and security updates to address the SSH server configuration weakness.