Vulnerability-Lookup

GHSA-5VXX-C285-PCQ4

Vulnerability from github – Published: 2025-04-21 16:17 – Updated: 2025-04-23 14:41

Summary

In Cilium, packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters

Details

Impact

When using Wireguard transparent encryption in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium.

Patches

This issue has been patched in https://github.com/cilium/cilium/pull/38592.

This issue affects:

Cilium v1.15 between v1.15.0 and v1.15.15 inclusive
Cilium v1.16 between v1.16.0 and v1.16.8 inclusive
Cilium v1.17 between v1.17.0 and v1.17.2 inclusive

This issue is fixed in:

Cilium v1.15.16
Cilium v1.16.9
Cilium v1.17.3

Workarounds

There is no workaround to this issue.

Acknowledgements

The Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @gandro and @pippolo84 for reporting this issue and to @julianwiedmann for the patch.

For more information

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

4.0 (Medium)


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

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cilium/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.13.0"
            },
            {
              "fixed": "1.15.16"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cilium/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.16.0"
            },
            {
              "fixed": "1.16.9"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/cilium/cilium"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.17.0"
            },
            {
              "fixed": "1.17.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-32793"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-319",
      "CWE-362"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-04-21T16:17:49Z",
    "nvd_published_at": "2025-04-21T16:15:54Z",
    "severity": "MODERATE"
  },
  "details": "### Impact\n\nWhen using [Wireguard transparent encryption](https://docs.cilium.io/en/stable/security/network/encryption-wireguard/#encryption-wg) in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium.\n\n### Patches\n\nThis issue has been patched in https://github.com/cilium/cilium/pull/38592.\n\nThis issue affects:\n\n- Cilium v1.15 between v1.15.0 and v1.15.15 inclusive\n- Cilium v1.16 between v1.16.0 and v1.16.8 inclusive\n- Cilium v1.17 between v1.17.0 and v1.17.2 inclusive\n\nThis issue is fixed in:\n\n- Cilium v1.15.16\n- Cilium v1.16.9\n- Cilium v1.17.3\n\n### Workarounds\n\nThere is no workaround to this issue.\n\n### Acknowledgements\n\nThe Cilium community has worked together with members of Isovalent to prepare these mitigations. Special thanks to @gandro  and @pippolo84 for reporting this issue and to @julianwiedmann for the patch.\n\n### For more information\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.",
  "id": "GHSA-5vxx-c285-pcq4",
  "modified": "2025-04-23T14:41:18Z",
  "published": "2025-04-21T16:17:49Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/security/advisories/GHSA-5vxx-c285-pcq4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-32793"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/pull/38592"
    },
    {
      "type": "WEB",
      "url": "https://github.com/cilium/cilium/commit/e8543eef05126e9ba8a845dc74e96f4e30f6dba9"
    },
    {
      "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:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "In Cilium, packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters"
}

CVE-2025-32793 (GCVE-0-2025-32793)

Vulnerability from cvelistv5 – Published: 2025-04-21 15:34 – Updated: 2025-04-21 15:48

Title

Cilium packets from terminating endpoints may not be encrypted in Wireguard-enabled clusters

Summary

Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.15.0 to 1.15.15, 1.16.0 to 1.16.8, and 1.17.0 to 1.17.2, are vulnerable when using Wireguard transparent encryption in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium. This issue has been patched in versions 1.15.16, 1.16.9, and 1.17.3. There are no workarounds available for this issue.

Severity

4 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-04-21 15:48 UTC

CWE

CWE-319 - Cleartext Transmission of Sensitive Information

Assigner

GitHub_M mitre root

References

2 references

URL	Tags
https://github.com/cilium/cilium/security/advisor…	x_refsource_CONFIRM
https://github.com/cilium/cilium/pull/38592	x_refsource_MISC

Impacted products

1 product

Vendor	Product	Version
cilium	cilium	Affected: >= v1.13.0, < v1.15.16 Affected: >= v1.16.0, < v1.16.9 Affected: >= v1.17.0, < v1.17.3

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-32793",
                "options": [
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                    "Exploitation": "none"
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
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                "role": "CISA Coordinator",
                "timestamp": "2025-04-21T15:48:39.310786Z",
                "version": "2.0.3"
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          "versions": [
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Cilium is a networking, observability, and security solution with an eBPF-based dataplane. Versions 1.15.0 to 1.15.15, 1.16.0 to 1.16.8, and 1.17.0 to 1.17.2, are vulnerable when using Wireguard transparent encryption in a Cilium cluster, packets that originate from a terminating endpoint can leave the source node without encryption due to a race condition in how traffic is processed by Cilium. This issue has been patched in versions 1.15.16, 1.16.9, and 1.17.3. There are no workarounds available for this issue."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
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      "providerMetadata": {
        "dateUpdated": "2025-04-21T15:34:14.315Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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