Unsigned image admission via repeated mutable-tag lookup
Published Dec 23, 2022 · Updated Apr 15, 2025
Image signature validation bypass in Kyverno 1.8.3 through 1.8.4 allows remote attackers to run unsigned images via a malicious registry. The verifyImages path performs two OCI registry lookups using the same mutable tag, so the second response can replace the verified digest with an unsigned image digest. Exploitation requires signature-enforcing verifyImages rules, a tag-based image reference, unavailable first-use digest replacement, and control of a referenced proxy or trusted registry.
Summary
What happened
Image signature validation bypass in Kyverno 1.8.3 through 1.8.4 allows remote attackers to run unsigned images via a malicious registry. The verifyImages path performs two OCI registry lookups using the same mutable tag, so the second response can replace the verified digest with an unsigned image digest. Exploitation requires signature-enforcing verifyImages rules, a tag-based image reference, unavailable first-use digest replacement, and control of a referenced proxy or trusted registry.
The record
- CVE
- CVE-2022-47633
- Published
- Dec 23, 2022
- Updated
- Apr 15, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-287, T1195.002
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 23, 2022CVE publishedPublication date reported by the CVE source.
- Apr 15, 2025Record updatedLatest update available in the CVE record.
Exploitability
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Published CVSS scores
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Attacks
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Technologies
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