GHSA-Q7W8-72MR-VPGW

Vulnerability from github – Published: 2024-08-15 21:43 – Updated: 2024-08-15 21:45
VLAI?
Summary
Policy bypass for Host Firewall policy due to race condition in Cilium agent
Details

Impact

A race condition in the Cilium agent can cause the agent to ignore labels that should be applied to a node. This could in turn cause CiliumClusterwideNetworkPolicies intended for nodes with the ignored label to not apply, leading to policy bypass.

Patches

This issue was fixed in https://github.com/cilium/cilium/pull/33511.

This issue affects:

  • All versions of Cilium before v1.14.14
  • Cilium v1.15 between v1.15.0 and v1.15.7 inclusive

This issue has been patched in:

  • Cilium v1.14.14
  • Cilium v1.15.8

Workarounds

As the underlying issue depends on a race condition, users unable to upgrade can restart the Cilium agent on affected nodes until the affected policies are confirmed to be working as expected.

Acknowledgements

The Cilium community has worked together with members of Google and Isovalent to prepare these mitigations. Special thanks to @skmatti for raising and resolving this issue.

For more information

If you have any questions or comments about this advisory, please reach out on Slack.

If you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at security@cilium.io. This is a private mailing list for the Cilium security team, and your report will be treated as top priority.

Severity ?
6.8 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cilium/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.14.14"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cilium/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.15.0"
            },
            {
              "fixed": "1.15.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2024-42488"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2024-08-15T21:43:38Z",
    "nvd_published_at": "2024-08-15T21:15:17Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nA race condition in the Cilium agent can cause the agent to ignore labels that should be applied to a node. This could in turn cause CiliumClusterwideNetworkPolicies intended for nodes with the ignored label to not apply, leading to policy bypass.\n\n### Patches\n\nThis issue was fixed in https://github.com/cilium/cilium/pull/33511.\n\nThis issue affects:\n\n- All versions of Cilium before v1.14.14\n- Cilium v1.15 between v1.15.0 and v1.15.7 inclusive\n\nThis issue has been patched in:\n\n- Cilium v1.14.14\n- Cilium v1.15.8\n\n### Workarounds\n\nAs the underlying issue depends on a race condition, users unable to upgrade can restart the Cilium agent on affected nodes until the affected policies are confirmed to be working as expected.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Google and Isovalent to prepare these mitigations. Special thanks to @skmatti for raising and resolving this issue.\n\n### For more information\n\nIf you have any questions or comments about this advisory, please reach out on [Slack](https://docs.cilium.io/en/latest/community/community/#slack).\n\nIf you think you have found a vulnerability affecting Cilium, we strongly encourage you to report it to our security mailing list at [security@cilium.io](mailto:security@cilium.io). This is a private mailing list for the Cilium security team, and your report will be treated as top priority.\n",
  "id": "GHSA-q7w8-72mr-vpgw",
  "modified": "2024-08-15T21:45:17Z",
  "published": "2024-08-15T21:43:38Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/security/advisories/GHSA-q7w8-72mr-vpgw"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-42488"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/pull/33511"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/commit/7877db09b3f34d3081a1d66459b8fa6603dc3d30"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/commit/aa44dd148a9be95e07782e4f990e61678ef0abf8"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/commit/f81a1ee0cfdec928980db8640def984b2eeaa134"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cilium/cilium"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Policy bypass for Host Firewall policy due to race condition in Cilium agent"
}


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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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