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kyverno verifyImages rule bypass possible with malicious proxy/registry

High severity GitHub Reviewed Published Dec 21, 2022 in kyverno/kyverno • Updated Jan 23, 2024

Package

gomod github.com/kyverno/kyverno (Go)

Affected versions

>= 1.8.3, < 1.8.5

Patched versions

1.8.5

Description

Impact

Users of Kyverno on versions 1.8.3 or 1.8.4 who use verifyImages rules to verify container image signatures, and do not prevent use of unknown registries.

Patches

This issue has been fixed in version 1.8.5

Workarounds

Configure a Kyverno policy to restrict registries to a set of secure trusted image registries (sample).

References

References

@chipzoller chipzoller published to kyverno/kyverno Dec 21, 2022
Published to the GitHub Advisory Database Dec 21, 2022
Reviewed Dec 21, 2022
Published by the National Vulnerability Database Dec 23, 2022
Last updated Jan 23, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.204%
(58th percentile)

Weaknesses

CVE ID

CVE-2022-47633

GHSA ID

GHSA-m3cq-xcx9-3gvm

Source code

Credits

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