FKIE_CVE-2025-11187

Vulnerability from fkie_nvd - Published: 2026-01-27 16:16 - Updated: 2026-02-02 18:39
Severity ?
6.1 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H
Summary
Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation which can trigger a stack-based buffer overflow, invalid pointer or NULL pointer dereference during MAC verification. Impact summary: The stack buffer overflow or NULL pointer dereference may cause a crash leading to Denial of Service for an application that parses untrusted PKCS#12 files. The buffer overflow may also potentially enable code execution depending on platform mitigations. When verifying a PKCS#12 file that uses PBMAC1 for the MAC, the PBKDF2 salt and keylength parameters from the file are used without validation. If the value of keylength exceeds the size of the fixed stack buffer used for the derived key (64 bytes), the key derivation will overflow the buffer. The overflow length is attacker-controlled. Also, if the salt parameter is not an OCTET STRING type this can lead to invalid or NULL pointer dereference. Exploiting this issue requires a user or application to process a maliciously crafted PKCS#12 file. It is uncommon to accept untrusted PKCS#12 files in applications as they are usually used to store private keys which are trusted by definition. For this reason the issue was assessed as Moderate severity. The FIPS modules in 3.6, 3.5 and 3.4 are not affected by this issue, as PKCS#12 processing is outside the OpenSSL FIPS module boundary. OpenSSL 3.6, 3.5 and 3.4 are vulnerable to this issue. OpenSSL 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue as they do not support PBMAC1 in PKCS#12.
References
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/205e3a55e16e4bd08c12fdbd3416ab829c0f6206Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/8caf359d6e46fb413e8f5f0df765d2e8a51df4e8Patch
openssl-security@openssl.orghttps://github.com/openssl/openssl/commit/e1079bc17ed93ff16f6b86f33a2fe3336e78817ePatch
openssl-security@openssl.orghttps://openssl-library.org/news/secadv/20260127.txtVendor Advisory
Impacted products
Vendor Product Version
openssl openssl *
openssl openssl *
openssl openssl *
To clipboard 

{
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B9D3DCAE-317D-4DFB-93F0-7A235A229619",
              "versionEndExcluding": "3.4.4",
              "versionStartIncluding": "3.4.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "1CAC7CBE-EC03-4089-938A-0CEEB2E09B62",
              "versionEndExcluding": "3.5.5",
              "versionStartIncluding": "3.5.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "68352537-5E99-4F4D-B78A-BCF0353A70A5",
              "versionEndExcluding": "3.6.1",
              "versionStartIncluding": "3.6.0",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Issue summary: PBMAC1 parameters in PKCS#12 files are missing validation\nwhich can trigger a stack-based buffer overflow, invalid pointer or NULL\npointer dereference during MAC verification.\n\nImpact summary: The stack buffer overflow or NULL pointer dereference may\ncause a crash leading to Denial of Service for an application that parses\nuntrusted PKCS#12 files. The buffer overflow may also potentially enable\ncode execution depending on platform mitigations.\n\nWhen verifying a PKCS#12 file that uses PBMAC1 for the MAC, the PBKDF2\nsalt and keylength parameters from the file are used without validation.\nIf the value of keylength exceeds the size of the fixed stack buffer used\nfor the derived key (64 bytes), the key derivation will overflow the buffer.\nThe overflow length is attacker-controlled. Also, if the salt parameter is\nnot an OCTET STRING type this can lead to invalid or NULL pointer\ndereference.\n\nExploiting this issue requires a user or application to process\na maliciously crafted PKCS#12 file. It is uncommon to accept untrusted\nPKCS#12 files in applications as they are usually used to store private\nkeys which are trusted by definition. For this reason the issue was assessed\nas Moderate severity.\n\nThe FIPS modules in 3.6, 3.5 and 3.4 are not affected by this issue, as\nPKCS#12 processing is outside the OpenSSL FIPS module boundary.\n\nOpenSSL 3.6, 3.5 and 3.4 are vulnerable to this issue.\n\nOpenSSL 3.3, 3.0, 1.1.1 and 1.0.2 are not affected by this issue as they do\nnot support PBMAC1 in PKCS#12."
    },
    {
      "lang": "es",
      "value": "Resumen del problema: Los par\u00e1metros PBMAC1 en archivos PKCS#12 carecen de validaci\u00f3n, lo que puede desencadenar un desbordamiento de b\u00fafer basado en pila, un puntero inv\u00e1lido o una desreferencia de puntero NULL durante la verificaci\u00f3n MAC.\n\nResumen del impacto: El desbordamiento de b\u00fafer de pila o la desreferencia de puntero NULL pueden causar un fallo que lleve a una denegaci\u00f3n de servicio para una aplicaci\u00f3n que analiza archivos PKCS#12 no confiables. El desbordamiento de b\u00fafer tambi\u00e9n puede potencialmente permitir la ejecuci\u00f3n de c\u00f3digo dependiendo de las mitigaciones de la plataforma.\n\nAl verificar un archivo PKCS#12 que utiliza PBMAC1 para el MAC, los par\u00e1metros de sal y longitud de clave (keylength) de PBKDF2 del archivo se utilizan sin validaci\u00f3n. Si el valor de la longitud de clave (keylength) excede el tama\u00f1o del b\u00fafer de pila fijo utilizado para la clave derivada (64 bytes), la derivaci\u00f3n de clave desbordar\u00e1 el b\u00fafer. La longitud del desbordamiento es controlada por el atacante. Adem\u00e1s, si el par\u00e1metro de sal no es de tipo OCTET STRING, esto puede llevar a una desreferencia de puntero inv\u00e1lido o NULL.\n\nLa explotaci\u00f3n de este problema requiere que un usuario o aplicaci\u00f3n procese un archivo PKCS#12 maliciosamente elaborado. Es poco com\u00fan aceptar archivos PKCS#12 no confiables en aplicaciones, ya que generalmente se utilizan para almacenar claves privadas que son confiables por definici\u00f3n. Por esta raz\u00f3n, el problema fue evaluado como de severidad Moderada.\n\nLos m\u00f3dulos FIPS en 3.6, 3.5 y 3.4 no se ven afectados por este problema, ya que el procesamiento de PKCS#12 est\u00e1 fuera del l\u00edmite del m\u00f3dulo FIPS de OpenSSL.\n\nOpenSSL 3.6, 3.5 y 3.4 son vulnerables a este problema.\n\nOpenSSL 3.3, 3.0, 1.1.1 y 1.0.2 no se ven afectados por este problema, ya que no soportan PBMAC1 en PKCS#12."
    }
  ],
  "id": "CVE-2025-11187",
  "lastModified": "2026-02-02T18:39:21.740",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 6.1,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "REQUIRED",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.3,
        "impactScore": 4.7,
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-01-27T16:16:14.093",
  "references": [
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/205e3a55e16e4bd08c12fdbd3416ab829c0f6206"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/8caf359d6e46fb413e8f5f0df765d2e8a51df4e8"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Patch"
      ],
      "url": "https://github.com/openssl/openssl/commit/e1079bc17ed93ff16f6b86f33a2fe3336e78817e"
    },
    {
      "source": "openssl-security@openssl.org",
      "tags": [
        "Vendor Advisory"
      ],
      "url": "https://openssl-library.org/news/secadv/20260127.txt"
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-476"
        },
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "openssl-security@openssl.org",
      "type": "Secondary"
    }
  ]
}


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