Kyverno prior 1.11.0 Image Manifest infinite loop

Summaryinfo

A vulnerability classified as problematic has been found in Kyverno. This vulnerability affects unknown code of the component Image Manifest Handler. This manipulation causes infinite loop. This vulnerability appears as CVE-2023-42815. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability has been found in Kyverno and classified as problematic. Affected by this vulnerability is some unknown processing of the component Image Manifest Handler. The manipulation with an unknown input leads to a infinite loop vulnerability. The CWE definition for the vulnerability is CWE-835. The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. As an impact it is known to affect availability. The summary by CVE is:

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.

The weakness was presented 11/14/2023 as GHSA-hjpv-68f4-2262. It is possible to read the advisory at github.com. This vulnerability is known as CVE-2023-42815 since 09/14/2023. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 1.11.0 eliminates this vulnerability.

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Productinfo

Name

• Kyverno

License

• open-source

Website

• Product: https://github.com/kyverno/kyverno/

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