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CVE-2016-0703 (GCVE-0-2016-0703)

Vulnerability from cvelistv5 – Published: 2016-03-02 00:00 – Updated: 2024-08-05 22:30
VLAI
Summary
The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800.
Severity
5.9 (Medium)
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
  • n/a
Assigner
References
URL Tags
http://www.oracle.com/technetwork/security-adviso…
http://www.securityfocus.com/bid/83743 vdb-entry
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
https://security.FreeBSD.org/advisories/FreeBSD-S… vendor-advisory
http://www.oracle.com/technetwork/topics/security…
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://www.oracle.com/technetwork/topics/security…
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
https://kb.pulsesecure.net/articles/Pulse_Securit…
https://drownattack.com
https://git.openssl.org/?p=openssl.git%3Ba=commit…
http://openssl.org/news/secadv/20160301.txt
http://tools.cisco.com/security/center/content/Ci… vendor-advisory
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
https://h20566.www2.hpe.com/portal/site/hpsc/publ…
https://h20566.www2.hpe.com/hpsc/doc/public/displ…
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
https://www.openssl.org/news/secadv/20160301.txt
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
https://security.gentoo.org/glsa/201603-15 vendor-advisory
http://www.oracle.com/technetwork/topics/security…
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://www.securitytracker.com/id/1035133 vdb-entry
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://lists.opensuse.org/opensuse-security-annou… vendor-advisory
http://kb.juniper.net/InfoCenter/index?page=conte…
https://www.arista.com/en/support/advisories-noti…
https://cert-portal.siemens.com/productcert/pdf/s…
Date Public
2016-03-01 00:00
Show details on NVD website
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800."
        },
        {
          "lang": "es",
          "value": "La funci\u00f3n get_client_master_key en s2_srvr.c en la implementaci\u00f3n de SSLv2 en OpenSSL en versiones anteriores a 0.9.8zf, 1.0.0 en versiones anteriores a 1.0.0r, 1.0.1 en versiones anteriores a 1.0.1m y 1.0.2 en versiones anteriores a 1.0.2a acepta un valor CLIENT-MASTER-KEY CLEAR-KEY-LENGTH distinto de cero para un cifrado arbitrario, lo que permite a atacantes man-in-the-middle determinar el valor MASTER-KEY y descifrar datos de texto cifrados con TLS aprovech\u00e1ndose de un Bleichenbacher RSA padding oracle, un caso relacionado con CVE-2016-0800."
        }
      ],
      "id": "CVE-2016-0703",
      "lastModified": "2024-11-21T02:42:11.927",
      "metrics": {
        "cvssMetricV2": [
          {
            "acInsufInfo": false,
            "baseSeverity": "MEDIUM",
            "cvssData": {
              "accessComplexity": "MEDIUM",
              "accessVector": "NETWORK",
              "authentication": "NONE",
              "availabilityImpact": "NONE",
              "baseScore": 4.3,
              "confidentialityImpact": "PARTIAL",
              "integrityImpact": "NONE",
              "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
              "version": "2.0"
            },
            "exploitabilityScore": 8.6,
            "impactScore": 2.9,
            "obtainAllPrivilege": false,
            "obtainOtherPrivilege": false,
            "obtainUserPrivilege": false,
            "source": "nvd@nist.gov",
            "type": "Primary",
            "userInteractionRequired": false
          }
        ],
        "cvssMetricV30": [
          {
            "cvssData": {
              "attackComplexity": "HIGH",
              "attackVector": "NETWORK",
              "availabilityImpact": "NONE",
              "baseScore": 5.9,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "NONE",
              "privilegesRequired": "NONE",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
              "version": "3.0"
            },
            "exploitabilityScore": 2.2,
            "impactScore": 3.6,
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      },
      "published": "2016-03-02T11:59:00.113",
      "references": [
        {
          "source": "secalert@redhat.com",
          "url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10759"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00002.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00004.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00006.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00007.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00010.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00012.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00017.html"
        },
        {
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          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00025.html"
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          "url": "http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00038.html"
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          "tags": [
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          "url": "http://openssl.org/news/secadv/20160301.txt"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
        },
        {
          "source": "secalert@redhat.com",
          "url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
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          "url": "http://www.securitytracker.com/id/1035133"
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        {
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          "url": "https://cert-portal.siemens.com/productcert/pdf/ssa-412672.pdf"
        },
        {
          "source": "secalert@redhat.com",
          "url": "https://drownattack.com"
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          "url": "https://git.openssl.org/?p=openssl.git%3Ba=commit%3Bh=ae50d8270026edf5b3c7f8aaa0c6677462b33d97"
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      "sourceIdentifier": "secalert@redhat.com",
      "vulnStatus": "Modified",
      "weaknesses": [
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          "description": [
            {
              "lang": "en",
              "value": "CWE-200"
            }
          ],
          "source": "nvd@nist.gov",
          "type": "Primary"
        }
      ]
    },
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                "negate": false,
                "operator": "OR"
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            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "The get_client_master_key function in s2_srvr.c in the SSLv2 implementation in OpenSSL before 0.9.8zf, 1.0.0 before 1.0.0r, 1.0.1 before 1.0.1m, and 1.0.2 before 1.0.2a accepts a nonzero CLIENT-MASTER-KEY CLEAR-KEY-LENGTH value for an arbitrary cipher, which allows man-in-the-middle attackers to determine the MASTER-KEY value and decrypt TLS ciphertext data by leveraging a Bleichenbacher RSA padding oracle, a related issue to CVE-2016-0800."
          },
          {
            "lang": "es",
            "value": "La funci\u00f3n get_client_master_key en s2_srvr.c en la implementaci\u00f3n de SSLv2 en OpenSSL en versiones anteriores a 0.9.8zf, 1.0.0 en versiones anteriores a 1.0.0r, 1.0.1 en versiones anteriores a 1.0.1m y 1.0.2 en versiones anteriores a 1.0.2a acepta un valor CLIENT-MASTER-KEY CLEAR-KEY-LENGTH distinto de cero para un cifrado arbitrario, lo que permite a atacantes man-in-the-middle determinar el valor MASTER-KEY y descifrar datos de texto cifrados con TLS aprovech\u00e1ndose de un Bleichenbacher RSA padding oracle, un caso relacionado con CVE-2016-0800."
          }
        ],
        "id": "CVE-2016-0703",
        "lastModified": "2026-05-06T22:30:45.220",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "MEDIUM",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "NONE",
                "baseScore": 4.3,
                "confidentialityImpact": "PARTIAL",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N",
                "version": "2.0"
              },
              "exploitabilityScore": 8.6,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ],
          "cvssMetricV30": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.0"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2016-03-02T11:59:00.113",
        "references": [
          {
            "source": "secalert@redhat.com",
            "url": "http://kb.juniper.net/InfoCenter/index?page=content\u0026id=JSA10759"
          },
          {
            "source": "secalert@redhat.com",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00001.html"
          },
          {
            "source": "secalert@redhat.com",
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00003.html"
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            "url": "http://lists.opensuse.org/opensuse-security-announce/2016-03/msg00009.html"
          },
          {
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          {
            "source": "secalert@redhat.com",
            "url": "http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160302-openssl"
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          {
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            "url": "http://www.oracle.com/technetwork/security-advisory/cpujan2018-3236628.html"
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        "sourceIdentifier": "secalert@redhat.com",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-200"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-05-14T18:08:44+00:00",
      "cve": "CVE-2016-0703",
      "id": "CVE-2016-0703",
      "initial_release_date": "2016-03-01T00:00:00+00:00",
      "product_status:fixed": "785",
      "product_status:known_affected": "1",
      "product_status:under_investigation": "4",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "openssl: Divide-and-conquer session key recovery in SSLv2",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2016/cve-2016-0703.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-04T01:06:49Z",
      "cve": "CVE-2016-0703",
      "id": "CVE-2016-0703",
      "initial_release_date": "2023-02-15T05:09:26Z",
      "product_status:recommended": "194",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2016-0703",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2016-0703.json",
      "version": "14"
    }
  }
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.