FKIE_CVE-2026-25791

Vulnerability from fkie_nvd - Published: 2026-02-09 21:15 - Updated: 2026-06-17 10:25
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0.
References
security-advisories@github.comhttps://github.com/BishopFox/sliver/releases/tag/v1.7.0Product, Release Notes
security-advisories@github.comhttps://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjpExploit, Vendor Advisory
Impacted products
Vendor Product Version
bishopfox sliver *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "sliver",
          "vendor": "BishopFox",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.7.0"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:bishopfox:sliver:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "7BD4DFA2-8C16-4122-A4D8-C3E03081913D",
              "versionEndExcluding": "1.7.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Sliver is a command and control framework that uses a custom Wireguard netstack. Prior to 1.7.0, the DNS C2 listener accepts unauthenticated TOTP bootstrap messages and allocates server-side DNS sessions without validating OTP values, even when EnforceOTP is enabled. Because sessions are stored without a cleanup/expiry path in this flow, an unauthenticated remote actor can repeatedly create sessions and drive memory exhaustion. This vulnerability is fixed in 1.7.0."
    },
    {
      "lang": "es",
      "value": "Sliver es un framework de comando y control que utiliza un netstack Wireguard personalizado. Antes de la versi\u00f3n 1.7.0, el oyente DNS C2 acepta mensajes de arranque TOTP no autenticados y asigna sesiones DNS del lado del servidor sin validar los valores OTP, incluso cuando EnforceOTP est\u00e1 habilitado. Dado que las sesiones se almacenan sin una ruta de limpieza/caducidad en este flujo, un actor remoto no autenticado puede crear sesiones repetidamente y provocar el agotamiento de la memoria. Esta vulnerabilidad se corrige en la versi\u00f3n 1.7.0."
    }
  ],
  "id": "CVE-2026-25791",
  "lastModified": "2026-06-17T10:25:15.053",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-25791",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-02-10T15:39:42.592936Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-02-09T21:15:49.650",
  "references": [
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Product",
        "Release Notes"
      ],
      "url": "https://github.com/BishopFox/sliver/releases/tag/v1.7.0"
    },
    {
      "source": "security-advisories@github.com",
      "tags": [
        "Exploit",
        "Vendor Advisory"
      ],
      "url": "https://github.com/BishopFox/sliver/security/advisories/GHSA-wxrw-gvg8-fqjp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-306"
        },
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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