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CVE-2023-42813

Denial of service from malicious manifest in kyverno

Basic Information

CVE State
PUBLISHED
Reserved Date
September 14, 2023
Published Date
November 13, 2023
Last Updated
August 02, 2024
Vendor
kyverno
Product
kyverno
Description
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 vulnerable component in Kyvernos Notary verifier. An attacker would need control over the registry from which Kyverno would fetch attestations. 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.

CVSS Scores

CVSS v3.1

6.1 - MEDIUM

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:N/I:N/A:H

Exploit Status

Exploited in the Wild
Yes (2023-11-13 20:34:23 UTC) Source

References

https://github.com/kyverno/kyverno/security/advisories/GHSA-wc3x-5rfv-hh5v https://github.com/kyverno/kyverno/pull/8428 https://github.com/kyverno/kyverno/commit/80d139bb5d1d9d7e907abe851b97dc73821a5be2 https://github.com/kyverno/kyverno/commit/fec2992e3f9fcd6b9c62267522c09b182e7df73b

Known Exploited Vulnerability Information

Source Added Date
CVE 2023-11-13 20:34:23 UTC

Timeline

  • CVE ID Reserved

  • CVE Published to Public

  • Added to KEVIntel