CVE-2022-36056 Explained : Impact and Mitigation

GitHub_M reported a vulnerability with blob verification in sigstore cosign, affecting versions prior to 1.12.0. The vulnerability allows successful verification of artifacts when it should have failed due to improper checks.

Understanding CVE-2022-36056

This CVE highlights vulnerabilities in cosign verify-blob that could lead to successful verification when it should fail.

What is CVE-2022-36056?

In versions prior to 1.12.0 of cosign, there are issues that allow for improper verification of artifacts even when verification should fail.

The Impact of CVE-2022-36056

The impact of this vulnerability is rated as MEDIUM with a CVSS base score of 5.5. It has a high integrity impact but does not affect confidentiality or availability. The attack complexity is low, and user interaction is not required.

Technical Details of CVE-2022-36056

This section provides detailed technical information about the vulnerability.

Vulnerability Description

Multiple vulnerabilities in cosign verify-blob allow for successful verification of artifacts that should fail due to inadequate checks.

Affected Systems and Versions

Versions prior to 1.12.0 of cosign are affected by this vulnerability.

Exploitation Mechanism

The vulnerabilities can be exploited by crafting a cosign bundle to successfully verify a blob despite proper signature references.

Mitigation and Prevention

To address CVE-2022-36056, immediate actions and long-term security practices are recommended.

Immediate Steps to Take

Users are advised to upgrade to version 1.12.0 of cosign to mitigate the vulnerabilities as there are no known workarounds.

Long-Term Security Practices

Implement robust verification mechanisms and regularly update software to prevent similar vulnerabilities.

Patching and Updates

Stay informed about security advisories and apply patches promptly to ensure the security of your systems.