Admission-request blocking via unbounded signature-referrer processing
Published Nov 13, 2023 · Updated Aug 2, 2024
Infinite-loop denial of service in Kyverno main-branch builds allows remote attackers to block admission requests via a malicious registry response. The Notary repository client's ListSignatures path accepts an unbounded referrers manifest list and iterates over every descriptor without a count limit. Exploitation requires control of a registry queried for signatures; official releases are unaffected, and the resulting stall blocks other users' admission requests.
Summary
What happened
Infinite-loop denial of service in Kyverno main-branch builds allows remote attackers to block admission requests via a malicious registry response. The Notary repository client's ListSignatures path accepts an unbounded referrers manifest list and iterates over every descriptor without a count limit. Exploitation requires control of a registry queried for signatures; official releases are unaffected, and the resulting stall blocks other users' admission requests.
The record
- CVE
- CVE-2023-42815
- Published
- Nov 13, 2023
- Updated
- Aug 2, 2024
- Vendor
- Kyverno
- Product
- Kyverno
- Classifications
- CWE-835, T1499.004
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Nov 13, 2023CVE publishedPublication date reported by the CVE source.
- Aug 2, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=>= 80d139bb5d1d9d7e907abe851b97dc73821a5be2, < fec2992e3f9fcd6b9c62267522c09b182e7df73b
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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