« Volver al listado

CVE-2018-0733

Estado: ModificadaMedia (5.9)—

Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g).

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Openssl — Openssl

CWE

Referencias

JSON original (NVD)

Mostrar
{
  "id": "CVE-2018-0733",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 4.3,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:M/Au:N/C:N/I:P/A:N",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
          "accessComplexity": "MEDIUM",
          "availabilityImpact": "NONE",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 8.6,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 5.9,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "integrityImpact": "HIGH",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 2.2
      }
    ]
  },
  "affected": [
    {
      "source": "openssl-security@openssl.org",
      "affectedData": [
        {
          "vendor": "OpenSSL",
          "product": "OpenSSL",
          "versions": [
            {
              "status": "affected",
              "version": "Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g)"
            }
          ]
        }
      ]
    }
  ],
  "published": "2018-03-27T21:29:00.610",
  "references": [
    {
      "url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/103517",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "http://www.securitytracker.com/id/1040576",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://security.gentoo.org/glsa/201811-21",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20180330-0002/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.openssl.org/news/secadv/20180327.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-04",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-06",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-07",
      "source": "openssl-security@openssl.org"
    },
    {
      "url": "http://www.oracle.com/technetwork/security-advisory/cpujul2018-4258247.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/103517",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securitytracker.com/id/1040576",
      "tags": [
        "Third Party Advisory",
        "VDB Entry"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=56d5a4bfcaf37fa420aef2bb881aa55e61cf5f2f",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.gentoo.org/glsa/201811-21",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://security.netapp.com/advisory/ntap-20180330-0002/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.openssl.org/news/secadv/20180327.txt",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpuapr2019-5072813.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujan2019-5072801.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-04",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-06",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.tenable.com/security/tns-2018-07",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Because of an implementation bug the PA-RISC CRYPTO_memcmp function is effectively reduced to only comparing the least significant bit of each byte. This allows an attacker to forge messages that would be considered as authenticated in an amount of tries lower than that guaranteed by the security claims of the scheme. The module can only be compiled by the HP-UX assembler, so that only HP-UX PA-RISC targets are affected. Fixed in OpenSSL 1.1.0h (Affected 1.1.0-1.1.0g)."
    },
    {
      "lang": "es",
      "value": "Debido a un error de implementación, la función CRYPTO_memcmp en PA-RISC únicamente compara el bit menos significativo o de menor peso de cada byte. Esto permite que un atacante falsifique mensajes que se considerarían como autenticados en una cantidad de intentos menor que los que aseguran las garantías de seguridad del esquema. El módulo solo se puede compilar con un ensamblador HP-UX, de forma que solo se ven afectados los PA-RISC de HP-UX. Solucionado en OpenSSL 1.1.0h (versiones 1.1.0-1.1.0g afectadas)."
    }
  ],
  "lastModified": "2026-06-17T01:31:32.683",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:openssl:openssl:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "322768B5-2E14-40B9-A784-8981F4376E13",
              "versionEndIncluding": "1.1.0g",
              "versionStartIncluding": "1.1.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "openssl-security@openssl.org"
}