GHSA-JCV7-6V4Q-4M7X

Vulnerability from github – Published: 2024-05-06 21:30 – Updated: 2024-07-01 15:31
VLAI?
Details

By design, the DHCP protocol does not authenticate messages, including for example the classless static route option (121). An attacker with the ability to send DHCP messages can manipulate routes to redirect VPN traffic, allowing the attacker to read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN. Many, if not most VPN systems based on IP routing are susceptible to such attacks.

Severity ?
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
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{
  "affected": [],
  "aliases": [
    "CVE-2024-3661"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-306"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2024-05-06T19:15:11Z",
    "severity": "HIGH"
  },
  "details": "By design, the DHCP protocol does not authenticate messages, including for example the classless static route option (121). An attacker with the ability to send DHCP messages can manipulate routes to redirect VPN traffic, allowing the attacker to read, disrupt, or possibly modify network traffic that was expected to be protected by the VPN. Many, if not most VPN systems based on IP routing are susceptible to such attacks.\n",
  "id": "GHSA-jcv7-6v4q-4m7x",
  "modified": "2024-07-01T15:31:59Z",
  "published": "2024-05-06T21:30:38Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-3661"
    },
    {
      "type": "WEB",
      "url": "https://www.zscaler.com/blogs/security-research/cve-2024-3661-k-tunnelvision-exposes-vpn-bypass-vulnerability"
    },
    {
      "type": "WEB",
      "url": "https://www.watchguard.com/wgrd-psirt/advisory/wgsa-2024-00009"
    },
    {
      "type": "WEB",
      "url": "https://www.theregister.com/2024/05/07/vpn_tunnelvision_dhcp"
    },
    {
      "type": "WEB",
      "url": "https://www.leviathansecurity.com/research/tunnelvision"
    },
    {
      "type": "WEB",
      "url": "https://www.leviathansecurity.com/blog/tunnelvision"
    },
    {
      "type": "WEB",
      "url": "https://www.agwa.name/blog/post/hardening_openvpn_for_def_con"
    },
    {
      "type": "WEB",
      "url": "https://tunnelvisionbug.com"
    },
    {
      "type": "WEB",
      "url": "https://support.citrix.com/article/CTX677069/cloud-software-group-security-advisory-for-cve20243661"
    },
    {
      "type": "WEB",
      "url": "https://security.paloaltonetworks.com/CVE-2024-3661"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=40284111"
    },
    {
      "type": "WEB",
      "url": "https://news.ycombinator.com/item?id=40279632"
    },
    {
      "type": "WEB",
      "url": "https://my.f5.com/manage/s/article/K000139553"
    },
    {
      "type": "WEB",
      "url": "https://mullvad.net/en/blog/evaluating-the-impact-of-tunnelvision"
    },
    {
      "type": "WEB",
      "url": "https://lowendtalk.com/discussion/188857/a-rogue-dhcp-server-within-your-network-can-and-will-hijack-your-vpn-traffic"
    },
    {
      "type": "WEB",
      "url": "https://krebsonsecurity.com/2024/05/why-your-vpn-may-not-be-as-secure-as-it-claims"
    },
    {
      "type": "WEB",
      "url": "https://issuetracker.google.com/issues/263721377"
    },
    {
      "type": "WEB",
      "url": "https://fortiguard.fortinet.com/psirt/FG-IR-24-170"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc3442#section-7"
    },
    {
      "type": "WEB",
      "url": "https://datatracker.ietf.org/doc/html/rfc2131#section-7"
    },
    {
      "type": "WEB",
      "url": "https://bst.cisco.com/quickview/bug/CSCwk05814"
    },
    {
      "type": "WEB",
      "url": "https://arstechnica.com/security/2024/05/novel-attack-against-virtually-all-vpn-apps-neuters-their-entire-purpose"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L",
      "type": "CVSS_V3"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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