GHSA-X6FH-7QMF-69XH

Vulnerability from github – Published: 2025-10-23 06:31 – Updated: 2025-10-23 16:49
VLAI?
Summary
Slack Nebula may accept arbitrary source IP addresses
Details

Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.

Severity ?
4.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L
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{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/slackhq/nebula"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.4"
            },
            {
              "fixed": "1.9.7"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-62820"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-420"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-10-23T16:49:07Z",
    "nvd_published_at": "2025-10-23T04:18:57Z",
    "severity": "MODERATE"
  },
  "details": "Slack Nebula before 1.9.7 mishandles CIDR in some configurations and thus accepts arbitrary source IP addresses within the Nebula network.",
  "id": "GHSA-x6fh-7qmf-69xh",
  "modified": "2025-10-23T16:49:07Z",
  "published": "2025-10-23T06:31:00Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-62820"
    },
    {
      "type": "WEB",
      "url": "https://github.com/slackhq/nebula/pull/1493"
    },
    {
      "type": "WEB",
      "url": "https://github.com/slackhq/nebula/pull/1494"
    },
    {
      "type": "WEB",
      "url": "https://github.com/slackhq/nebula/commit/e264a0ff888c7bf0568579306755a60fc42f6ecc"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/slackhq/nebula"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Slack Nebula may accept arbitrary source IP addresses "
}


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Detection rules are retrieved from Rulezet.