CVE-2023-33191: Github.com/kyverno/kyverno Kyverno Seccomp Control Can Be Vulnerability

MODERATE
Advisory Identifier: GHSA-33hq-f2mf-jm3c
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CVSS 4.6
CWE-284
Published
Advisory Summary

CVE-2023-33191 is a MODERATE (CVSS 4.6) kyverno seccomp control can be vulnerability (CWE-284: Improper Access Control) affecting Github.com/kyverno/kyverno libraries in the Go ecosystem. The issue involves kyverno seccomp control can be circumvented. Remediation is available by upgrading affected packages to version 1.9.4.

CVE-2023-33191 at a Glance

CVE Identifier CVE-2023-33191
GHSA Identifier GHSA-33hq-f2mf-jm3c
Severity MODERATE
CVSS v3.1 Base Score 4.6
CWE Classification CWE-284: Improper Access Control
Affected Product Github.com/kyverno/kyverno
Package Ecosystem Go
Published Date
Last Updated

Security Impact

CVSS: 4.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity High (AC:H)
Privileges Required Low (PR:L)
User Interaction Required (UI:R)
Scope Unchanged (S:U)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2023-33191

To remediate this vulnerability, upgrade all affected Github.com/kyverno/kyverno dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

github.com/kyverno/kyverno fixed: 1.9.4 
Upgrade github.com/kyverno/kyverno to 1.9.4
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

inspect dependencies for github.com/kyverno/kyverno

How to Check if You Are Affected

To determine whether your application is affected by CVE-2023-33191, inspect your project dependencies for Github.com/kyverno/kyverno:

inspect dependencies for github.com/kyverno/kyverno

Analyze the terminal output to locate any version of Github.com/kyverno/kyverno in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.9.4), your application is affected.

Note: Verify declared build manifests and deployed runtime container environments.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-284: Improper Access Control, where the product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. In Github.com/kyverno/kyverno, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

### Impact Users of the podSecurity (`validate.podSecurity`) subrule in Kyverno versions v1.9.2 and v1.9.3 may be unable to enforce the check for the Seccomp control at the baseline level when using a `version` value of `latest`. There is no effect if a version number is referenced instead. See the [documentation](https://kyverno.io/docs/writing-policies/validate/#pod-security) for information on this subrule type. Users of Kyverno v1.9.2 and v1.9.3 are affected. ### Patches v1.9.4 v1.10.0 ### Workarounds To work around this issue without upgrading to v1.9.4, temporarily install individual policies for the respective Seccomp checks in baseline [here](https://kyverno.io/policies/pod-security/baseline/restrict-seccomp/restrict-seccomp/) and restricted [here](https://kyverno.io/policies/pod-security/restricted/restrict-seccomp-strict/restrict-seccomp-strict/). ### References * https://kyverno.io/docs/writing-policies/validate/#pod-security * https://github.com/kyverno/kyverno/pull/7263

CVE-2023-33191 Affected Github.com/kyverno/kyverno Versions

1 component(s)
Fixed Versions:
1.9.4
Product / Package Ecosystem Affected Versions Fixed Version
github.com/kyverno/kyverno
golang/github.com/kyverno/kyverno
Go
≥ 1.9.2
< 1.9.4
1.9.4

References

GitHub Advisory / Wiki ADVISORY
https://github.com/kyverno/kyverno/security/advisories/GHSA-33hq-f2mf-jm3c
NVD — CVE-2023-33191 NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-33191
Github.com/kyverno/kyverno Source Repository REPOSITORY
https://github.com/kyverno/kyverno/pull/7263
Github.com/kyverno/kyverno Source Repository REPOSITORY
https://github.com/kyverno/kyverno
Github.com/kyverno/kyverno Release RELEASE
https://github.com/kyverno/kyverno/releases/tag/v1.9.4

Frequently Asked Questions

What is CVE-2023-33191?
CVE-2023-33191 is a security vulnerability in Github.com/kyverno/kyverno involving kyverno seccomp control can be circumvented under CWE-284: Improper Access Control.
Which Github.com/kyverno/kyverno versions are affected?
Affected versions include releases prior to 1.9.4 across affected packages: github.com/kyverno/kyverno.
What version fixes CVE-2023-33191?
Upgrading to 1.9.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is github.com/kyverno/kyverno affected?
Yes, github.com/kyverno/kyverno is affected in releases prior to 1.9.4. Upgrade your dependency to 1.9.4 or later.
What is the CVSS score of CVE-2023-33191?
CVE-2023-33191 has a CVSS v3.1 base score of 4.6 (MODERATE) with vector string CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L.
What CWE is associated with CVE-2023-33191?
CVE-2023-33191 is classified under CWE-284: Improper Access Control (The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor.).
How can I check Go dependencies for CVE-2023-33191?
Run the dependency tree command: 'inspect dependencies for github.com/kyverno/kyverno'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-33hq-f2mf-jm3c",
  "modified" : "2023-06-01T04:07:20Z",
  "published" : "2023-05-25T16:58:48Z",
  "aliases" : [ "CVE-2023-33191" ],
  "summary" : "kyverno seccomp control can be circumvented",
  "details" : "### Impact\n\nUsers of the podSecurity (`validate.podSecurity`) subrule in Kyverno versions v1.9.2 and v1.9.3 may be unable to enforce the check for the Seccomp control at the baseline level when using a `version` value of `latest`. There is no effect if a version number is referenced instead. See the [documentation](https://kyverno.io/docs/writing-policies/validate/#pod-security) for information on this subrule type. Users of Kyverno v1.9.2 and v1.9.3 are affected.\n\n### Patches\n\nv1.9.4\nv1.10.0\n\n### Workarounds\n\nTo work around this issue without upgrading to v1.9.4, temporarily install individual policies for the respective Seccomp checks in baseline [here](https://kyverno.io/policies/pod-security/baseline/restrict-seccomp/restrict-seccomp/) and restricted [here](https://kyverno.io/policies/pod-security/restricted/restrict-seccomp-strict/restrict-seccomp-strict/).\n\n### References\n\n* https://kyverno.io/docs/writing-policies/validate/#pod-security\n* https://github.com/kyverno/kyverno/pull/7263\n",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "Go",
      "name" : "github.com/kyverno/kyverno"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "1.9.2"
      }, {
        "fixed" : "1.9.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/kyverno/kyverno/security/advisories/GHSA-33hq-f2mf-jm3c"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2023-33191"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kyverno/kyverno/pull/7263"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/kyverno/kyverno"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/kyverno/kyverno/releases/tag/v1.9.4"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-284" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2023-05-25T16:58:48Z",
    "nvd_published_at" : "2023-05-30T07:15:09Z"
  }
}