Kyverno is a policy engine designed for Kubernetes. A security vulnerability was found in Kyverno where an attacker could cause denial of service of Kyverno. The vulnerability was in Kyvernos Notary verifier. An attacker would need control over the registry from which Kyverno would fetch signatures. With such a position, the attacker could return a malicious response to Kyverno, when Kyverno would send a request to the registry. The malicious response would cause denial of service of Kyverno, such that other users' admission requests would be blocked from being processed. This is a vulnerability in a new component released in v1.11.0. The only users affected by this are those that have been building Kyverno from source at the main branch which is not encouraged. Users consuming official Kyverno releases are not affected. There are no known cases of this vulnerability being exploited in the wild.
Published 2023-11-13 21:15:08
Updated 2023-11-21 13:55:36
Source GitHub, Inc.
View at NVD,   CVE.org
Vulnerability category: Denial of service

Products affected by CVE-2023-42816

Exploit prediction scoring system (EPSS) score for CVE-2023-42816

0.11%
Probability of exploitation activity in the next 30 days EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2023-42816

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Score Source First Seen
5.3
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
1.6
3.6
NIST
6.1
MEDIUM CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H
1.6
4.0
GitHub, Inc.

CWE ids for CVE-2023-42816

References for CVE-2023-42816

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