PT-2023-30524 · Kyverno · Kyverno
Adamkorcz
·
Published
2023-11-14
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Updated
2026-04-16
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CVE-2023-47630
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
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.
Exploit
Fix
Insufficient Verification of Data Authenticity
Information Disclosure
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Related Identifiers
Affected Products
Kyverno