gsd-2020-1967
Vulnerability from gsd
Modified
2023-12-13 01:21
Details
Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the "signature_algorithms_cert" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).
Aliases
Aliases
CVE-2020-1967


To clipboard 

{
  "GSD": {
    "alias": "CVE-2020-1967",
    "description": "Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the \"signature_algorithms_cert\" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).",
    "id": "GSD-2020-1967",
    "references": [
      "https://www.suse.com/security/cve/CVE-2020-1967.html",
      "https://www.debian.org/security/2020/dsa-4661",
      "https://security.archlinux.org/CVE-2020-1967",
      "https://packetstormsecurity.com/files/cve/CVE-2020-1967"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2020-1967"
      ],
      "details": "Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the \"signature_algorithms_cert\" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f).",
      "id": "GSD-2020-1967",
      "modified": "2023-12-13T01:21:57.664057Z",
      "schema_version": "1.4.0"
    }
  },
  "namespaces": {
    "cve.org": {
      "CVE_data_meta": {
        "ASSIGNER": "openssl-security@openssl.org",
        "DATE_PUBLIC": "2020-04-21",
        "ID": "CVE-2020-1967",
        "STATE": "PUBLIC",
        "TITLE": "Segmentation fault in SSL_check_chain"
      },
      "affects": {
        "vendor": {
          "vendor_data": [
            {
              "product": {
                "product_data": [
                  {
                    "product_name": "OpenSSL",
                    "version": {
                      "version_data": [
                        {
                          "version_value": "Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f)"
                        }
                      ]
                    }
                  }
                ]
              },
              "vendor_name": "OpenSSL"
            }
          ]
        }
      },
      "credit": [
        {
          "lang": "eng",
          "value": "Bernd Edlinger"
        }
      ],
      "data_format": "MITRE",
      "data_type": "CVE",
      "data_version": "4.0",
      "description": {
        "description_data": [
          {
            "lang": "eng",
            "value": "Server or client applications that call the SSL_check_chain() function during or after a TLS 1.3 handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the \"signature_algorithms_cert\" TLS extension. The crash occurs if an invalid or unrecognised signature algorithm is received from the peer. This could be exploited by a malicious peer in a Denial of Service attack. OpenSSL version 1.1.1d, 1.1.1e, and 1.1.1f are affected by this issue. This issue did not affect OpenSSL versions prior to 1.1.1d. Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f)."
          }
        ]
      },
      "impact": [
        {
          "lang": "eng",
          "url": "https://www.openssl.org/policies/secpolicy.html#High",
          "value": "High"
        }
      ],
      "problemtype": {
        "problemtype_data": [
          {
            "description": [
              {
                "lang": "eng",
                "value": "NULL pointer dereference"
              }
            ]
          }
        ]
      },
      "references": {
        "reference_data": [
          {
            "name": "FreeBSD-SA-20:11",
            "refsource": "FREEBSD",
            "url": "https://security.FreeBSD.org/advisories/FreeBSD-SA-20:11.openssl.asc"
          },
          {
            "name": "DSA-4661",
            "refsource": "DEBIAN",
            "url": "https://www.debian.org/security/2020/dsa-4661"
          },
          {
            "name": "[oss-security] 20200422 [CVE-2020-1967] OpenSSL 1.1.1d+ Segmentation fault in SSL_check_chain",
            "refsource": "MLIST",
            "url": "http://www.openwall.com/lists/oss-security/2020/04/22/2"
          },
          {
            "name": "[tomcat-dev] 20200422 Time for Tomcat Native 1.2.24?",
            "refsource": "MLIST",
            "url": "https://lists.apache.org/thread.html/r9a41e304992ce6aec6585a87842b4f2e692604f5c892c37e3b0587ee@%3Cdev.tomcat.apache.org%3E"
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          {
            "name": "[tomcat-dev] 20200422 Re: Time for Tomcat Native 1.2.24?",
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            "url": "https://lists.apache.org/thread.html/r66ea9c436da150683432db5fbc8beb8ae01886c6459ac30c2cea7345@%3Cdev.tomcat.apache.org%3E"
          },
          {
            "name": "[tomcat-dev] 20200423 Re: Time for Tomcat Native 1.2.24?",
            "refsource": "MLIST",
            "url": "https://lists.apache.org/thread.html/r94d6ac3f010a38fccf4f432b12180a13fa1cf303559bd805648c9064@%3Cdev.tomcat.apache.org%3E"
          },
          {
            "name": "GLSA-202004-10",
            "refsource": "GENTOO",
            "url": "https://security.gentoo.org/glsa/202004-10"
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          {
            "name": "FEDORA-2020-fcc91a28e8",
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            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XVEP3LAK4JSPRXFO4QF4GG2IVXADV3SO/"
          },
          {
            "name": "FEDORA-2020-da2d1ef2d7",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/DDHOAATPWJCXRNFMJ2SASDBBNU5RJONY/"
          },
          {
            "name": "20200501 CVE-2020-1967: proving sigalg != NULL",
            "refsource": "FULLDISC",
            "url": "http://seclists.org/fulldisclosure/2020/May/5"
          },
          {
            "name": "FEDORA-2020-d7b29838f6",
            "refsource": "FEDORA",
            "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EXDDAOWSAIEFQNBHWYE6PPYFV4QXGMCD/"
          },
          {
            "name": "openSUSE-SU-2020:0933",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00004.html"
          },
          {
            "name": "openSUSE-SU-2020:0945",
            "refsource": "SUSE",
            "url": "http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00011.html"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpujul2020.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpujul2020.html"
          },
          {
            "name": "https://www.tenable.com/security/tns-2020-03",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/tns-2020-03"
          },
          {
            "name": "https://www.openssl.org/news/secadv/20200421.txt",
            "refsource": "CONFIRM",
            "url": "https://www.openssl.org/news/secadv/20200421.txt"
          },
          {
            "name": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1",
            "refsource": "CONFIRM",
            "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1"
          },
          {
            "name": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440",
            "refsource": "CONFIRM",
            "url": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440"
          },
          {
            "name": "https://security.netapp.com/advisory/ntap-20200424-0003/",
            "refsource": "CONFIRM",
            "url": "https://security.netapp.com/advisory/ntap-20200424-0003/"
          },
          {
            "name": "https://www.synology.com/security/advisory/Synology_SA_20_05_OpenSSL",
            "refsource": "CONFIRM",
            "url": "https://www.synology.com/security/advisory/Synology_SA_20_05_OpenSSL"
          },
          {
            "name": "https://github.com/irsl/CVE-2020-1967",
            "refsource": "MISC",
            "url": "https://github.com/irsl/CVE-2020-1967"
          },
          {
            "name": "http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html",
            "refsource": "MISC",
            "url": "http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html"
          },
          {
            "name": "https://www.synology.com/security/advisory/Synology_SA_20_05",
            "refsource": "CONFIRM",
            "url": "https://www.synology.com/security/advisory/Synology_SA_20_05"
          },
          {
            "name": "https://www.tenable.com/security/tns-2020-04",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/tns-2020-04"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpuoct2020.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
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          {
            "name": "https://security.netapp.com/advisory/ntap-20200717-0004/",
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            "url": "https://security.netapp.com/advisory/ntap-20200717-0004/"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpujan2021.html",
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            "url": "https://www.oracle.com/security-alerts/cpujan2021.html"
          },
          {
            "name": "https://www.tenable.com/security/tns-2020-11",
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            "url": "https://www.tenable.com/security/tns-2020-11"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpuApr2021.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpuApr2021.html"
          },
          {
            "name": "https://www.tenable.com/security/tns-2021-10",
            "refsource": "CONFIRM",
            "url": "https://www.tenable.com/security/tns-2021-10"
          },
          {
            "name": "https://www.oracle.com//security-alerts/cpujul2021.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com//security-alerts/cpujul2021.html"
          },
          {
            "name": "https://www.oracle.com/security-alerts/cpuoct2021.html",
            "refsource": "MISC",
            "url": "https://www.oracle.com/security-alerts/cpuoct2021.html"
          }
        ]
      }
    },
    "gitlab.com": {
      "advisories": [
        {
          "affected_range": "\u003e=1.1.1d \u003c=1.1.1f",
          "affected_versions": "All versions starting from 1.1.1d up to 1.1.1f",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-476",
            "CWE-937"
          ],
          "date": "2021-12-10",
          "description": "Server or client applications that call the `SSL_check_chain()` function during or after a TLS handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the `signature_algorithms_cert` TLS extension.",
          "fixed_versions": [
            "1.1.1g"
          ],
          "identifier": "CVE-2020-1967",
          "identifiers": [
            "CVE-2020-1967"
          ],
          "not_impacted": "All versions before 1.1.1d, all versions after 1.1.1f",
          "package_slug": "conan/openssl",
          "pubdate": "2020-04-21",
          "solution": "Upgrade to version 1.1.1g or above.",
          "title": "NULL Pointer Dereference",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-1967",
            "http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html",
            "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1",
            "https://www.openssl.org/news/secadv/20200421.txt"
          ],
          "uuid": "717b48de-d2c7-4a49-8c10-2f8bc50e39dc"
        },
        {
          "affected_range": "(,8.0.20]",
          "affected_versions": "All versions up to 8.0.20",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-476",
            "CWE-937"
          ],
          "date": "2021-12-10",
          "description": "Server or client applications that call the `SSL_check_chain()` function during or after a TLS handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the `signature_algorithms_cert` TLS extension.",
          "fixed_versions": [],
          "identifier": "CVE-2020-1967",
          "identifiers": [
            "CVE-2020-1967"
          ],
          "not_impacted": "",
          "package_slug": "maven/mysql-connector-java",
          "pubdate": "2020-04-21",
          "solution": "Unfortunately, there is no solution available yet.",
          "title": "NULL Pointer Dereference",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-1967",
            "http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html",
            "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1",
            "https://www.openssl.org/news/secadv/20200421.txt"
          ],
          "uuid": "d61b74ab-1887-4af9-8fdc-daafed5df3d9"
        },
        {
          "affected_range": "\u003c=8.0.20",
          "affected_versions": "All versions up to 8.0.20",
          "cvss_v2": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "cvss_v3": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "cwe_ids": [
            "CWE-1035",
            "CWE-476",
            "CWE-937"
          ],
          "date": "2021-12-10",
          "description": "Server or client applications that call the `SSL_check_chain()` function during or after a TLS handshake may crash due to a NULL pointer dereference as a result of incorrect handling of the `signature_algorithms_cert` TLS extension.",
          "fixed_versions": [
            "8.0.21"
          ],
          "identifier": "CVE-2020-1967",
          "identifiers": [
            "CVE-2020-1967"
          ],
          "not_impacted": "All versions after 8.0.20",
          "package_slug": "pypi/mysql-connector-python",
          "pubdate": "2020-04-21",
          "solution": "Upgrade to version 8.0.21 or above.",
          "title": "NULL Pointer Dereference",
          "urls": [
            "https://nvd.nist.gov/vuln/detail/CVE-2020-1967",
            "http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html",
            "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1",
            "https://www.openssl.org/news/secadv/20200421.txt"
          ],
          "uuid": "29560bc1-18a4-4350-9eaf-b6a85bcce039"
        }
      ]
    },
    "nvd.nist.gov": {
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      },
      "impact": {
        "baseMetricV2": {
          "acInsufInfo": false,
          "cvssV2": {
            "accessComplexity": "LOW",
            "accessVector": "NETWORK",
            "authentication": "NONE",
            "availabilityImpact": "PARTIAL",
            "baseScore": 5.0,
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
        },
        "baseMetricV3": {
          "cvssV3": {
            "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
        }
      },
      "lastModifiedDate": "2021-12-10T17:11Z",
      "publishedDate": "2020-04-21T14:15Z"
    }
  }
}


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