CVE-2023-47630

Name of the Vulnerable Software and Affected Versions Kyverno versions prior to 1.10.5 Kyverno versions prior to 1.11

Description An issue was found in Kyverno that allowed an attacker to control the digest of images used by Kyverno users. The issue would require the attacker to compromise the registry that the Kyverno users fetch their images from. The attacker could then return a vulnerable image to the user and leverage that to further escalate their position. As such, the attacker would need to know which images the Kyverno user consumes and know of one of multiple exploitable vulnerabilities in previous digests of the images. Alternatively, if the attacker has compromised the registry, they could craft a malicious image with a different digest with intentionally placed vulnerabilities and deliver the image to the user. Users pulling their images by digests and from trusted registries are not impacted by this issue. There is no evidence of this being exploited in the wild.

Recommendations For Kyverno versions prior to 1.10.5, upgrade to version 1.10.5 or later. For Kyverno versions prior to 1.11, upgrade to version 1.11 or later. As a temporary workaround, consider restricting access to untrusted registries and ensuring that images are pulled by digests from trusted sources. Avoid using images with unknown or unverified digests until the issue is resolved.