GSD-2020-1967

Vulnerability from gsd - Updated: 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
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{
  "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)"
                        }
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              },
              "vendor_name": "OpenSSL"
            }
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        }
      },
      "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"
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      "problemtype": {
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                "value": "NULL pointer dereference"
              }
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            "name": "[tomcat-dev] 20200422 Time for Tomcat Native 1.2.24?",
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          {
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        {
          "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",
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            "CWE-476",
            "CWE-937"
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          "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"
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          "uuid": "717b48de-d2c7-4a49-8c10-2f8bc50e39dc"
        },
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          "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",
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            "CWE-937"
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          "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"
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          "uuid": "d61b74ab-1887-4af9-8fdc-daafed5df3d9"
        },
        {
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          "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"
        }
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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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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.