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CVE-2022-23649

3.3 · LOW

Cosign provides container signing, verification, and storage in an OCI registry for the sigstore project.

Published Feb 18, 2022CWE-295EPSS 0.16%

Overview

CVE-2022-23649 is a low-severity vulnerability. It was published on February 18, 2022 and has a CVSS 3.1 base score of 3.3 (LOW).

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

Cosign provides container signing, verification, and storage in an OCI registry for the sigstore project. Prior to version 1.5.2, Cosign can be manipulated to claim that an entry for a signature exists in the Rekor transparency log even if it doesn't. This requires the attacker to have pull and push permissions for the signature in OCI. This can happen with both standard signing with a keypair and "keyless signing" with Fulcio. If an attacker has access to the signature in OCI, they can manipulate cosign into believing the entry was stored in Rekor even though it wasn't. The vulnerability has been patched in v1.5.2 of Cosign. The `signature` in the `signedEntryTimestamp` provided by Rekor is now compared to the `signature` that is being verified. If these don't match, then an error is returned. If a valid bundle is copied to a different signature, verification should fail. Cosign output now only informs the user that certificates were verified if a certificate was in fact verified. The

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/sigstore/cosign/commit/96d410a6580e4e81d24d112a0855c70ca3fb5b49GitHubgithub.com/sigstore/cosign/security/advisories/GHSA-ccxc-vr6p-4858GitHubgithub.com/sigstore/cosign/commit/96d410a6580e4e81d24d112a0855c70ca3fb5b49GitHubgithub.com/sigstore/cosign/security/advisories/GHSA-ccxc-vr6p-4858

How CyberStrike helps

Frequently asked questions

What is CVE-2022-23649?

CVE-2022-23649 is a low-severity vulnerability. It was published on February 18, 2022 and has a CVSS 3.1 base score of 3.3 (LOW).

How severe is CVE-2022-23649?

This vulnerability has a CVSS 3.1 base score of 3.3, rated LOW. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-23649?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-23649?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-23649 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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