CVE-2020-1967 (GCVE-0-2020-1967)

Vulnerability from cvelistv5 – Published: 2020-04-21 13:45 – Updated: 2024-09-17 03:13
VLAI?
Summary
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).
Severity ?
No CVSS data available.
CWE
  • NULL pointer dereference
Assigner
References
https://security.FreeBSD.org/advisories/FreeBSD-S… vendor-advisoryx_refsource_FREEBSD
https://www.debian.org/security/2020/dsa-4661 vendor-advisoryx_refsource_DEBIAN
http://www.openwall.com/lists/oss-security/2020/04/22/2 mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r9a41e304992… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r66ea9c436da… mailing-listx_refsource_MLIST
https://lists.apache.org/thread.html/r94d6ac3f010… mailing-listx_refsource_MLIST
https://security.gentoo.org/glsa/202004-10 vendor-advisoryx_refsource_GENTOO
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://seclists.org/fulldisclosure/2020/May/5 mailing-listx_refsource_FULLDISC
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://www.oracle.com/security-alerts/cpujul2020.html x_refsource_MISC
https://www.tenable.com/security/tns-2020-03 x_refsource_CONFIRM
https://www.openssl.org/news/secadv/20200421.txt x_refsource_CONFIRM
https://git.openssl.org/gitweb/?p=openssl.git%3Ba… x_refsource_CONFIRM
https://kb.pulsesecure.net/articles/Pulse_Securit… x_refsource_CONFIRM
https://security.netapp.com/advisory/ntap-2020042… x_refsource_CONFIRM
https://www.synology.com/security/advisory/Synolo… x_refsource_CONFIRM
https://github.com/irsl/CVE-2020-1967 x_refsource_MISC
http://packetstormsecurity.com/files/157527/OpenS… x_refsource_MISC
https://www.synology.com/security/advisory/Synolo… x_refsource_CONFIRM
https://www.tenable.com/security/tns-2020-04 x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpuoct2020.html x_refsource_MISC
https://security.netapp.com/advisory/ntap-2020071… x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpujan2021.html x_refsource_MISC
https://www.tenable.com/security/tns-2020-11 x_refsource_CONFIRM
https://www.oracle.com/security-alerts/cpuApr2021.html x_refsource_MISC
https://www.tenable.com/security/tns-2021-10 x_refsource_CONFIRM
https://www.oracle.com//security-alerts/cpujul2021.html x_refsource_MISC
https://www.oracle.com/security-alerts/cpuoct2021.html x_refsource_MISC
Impacted products
Vendor Product Version
OpenSSL OpenSSL Affected: Fixed in OpenSSL 1.1.1g (Affected 1.1.1d-1.1.1f)
Create a notification for this product.
Credits
Bernd Edlinger
Show details on NVD website
To clipboard 

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                  "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"
            },
            {
              "name": "[tomcat-dev] 20200422 Re: Time for Tomcat Native 1.2.24?",
              "refsource": "MLIST",
              "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"
            },
            {
              "name": "FEDORA-2020-fcc91a28e8",
              "refsource": "FEDORA",
              "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",
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              "url": "https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=eb563247aef3e83dda7679c43f9649270462e5b1"
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              "name": "https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440",
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            {
              "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"
            },
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              "refsource": "MISC",
              "url": "https://github.com/irsl/CVE-2020-1967"
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            {
              "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"
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            {
              "name": "https://www.tenable.com/security/tns-2020-04",
              "refsource": "CONFIRM",
              "url": "https://www.tenable.com/security/tns-2020-04"
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            {
              "name": "https://www.oracle.com/security-alerts/cpuoct2020.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpuoct2020.html"
            },
            {
              "name": "https://security.netapp.com/advisory/ntap-20200717-0004/",
              "refsource": "CONFIRM",
              "url": "https://security.netapp.com/advisory/ntap-20200717-0004/"
            },
            {
              "name": "https://www.oracle.com/security-alerts/cpujan2021.html",
              "refsource": "MISC",
              "url": "https://www.oracle.com/security-alerts/cpujan2021.html"
            },
            {
              "name": "https://www.tenable.com/security/tns-2020-11",
              "refsource": "CONFIRM",
              "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"
            }
          ]
        }
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "3a12439a-ef3a-4c79-92e6-6081a721f1e5",
    "assignerShortName": "openssl",
    "cveId": "CVE-2020-1967",
    "datePublished": "2020-04-21T13:45:15.136203Z",
    "dateReserved": "2019-12-03T00:00:00",
    "dateUpdated": "2024-09-17T03:13:46.200Z",
    "state": "PUBLISHED"
  },
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      "descriptions": "[{\"lang\": \"en\", \"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).\"}, {\"lang\": \"es\", \"value\": \"Las aplicaciones de Servidor o Cliente que llaman a la funci\\u00f3n SSL_check_chain() durante o despu\\u00e9s del protocolo de enlace de TLS versi\\u00f3n 1.3,  puede bloquear debido a una desreferencia del puntero NULL como resultado de un manejo incorrecto de la extensi\\u00f3n TLS \\\"signature_algorithms_cert\\\". El bloqueo ocurre si se recibe un algoritmo de firma no comprobada o ni reconocido del peer. Esto podr\\u00eda ser explotado por un peer malicioso en un ataque de Denegaci\\u00f3n de Servicio. OpenSSL versiones 1.1.1d, 1.1.1e y 1.1.1f est\\u00e1n afectadas por este problema. Este problema no afectaba a OpenSSL versiones anteriores a la versi\\u00f3n  1.1.1d. Corregido en OpenSSL versi\\u00f3n 1.1.1g (Afectado en la versi\\u00f3n 1.1.1d-1.1.1f).\"}]",
      "id": "CVE-2020-1967",
      "lastModified": "2024-11-21T05:11:45.023",
      "metrics": "{\"cvssMetricV31\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"3.1\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"attackVector\": \"NETWORK\", \"attackComplexity\": \"LOW\", \"privilegesRequired\": \"NONE\", \"userInteraction\": \"NONE\", \"scope\": \"UNCHANGED\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"HIGH\"}, \"exploitabilityScore\": 3.9, \"impactScore\": 3.6}], \"cvssMetricV2\": [{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"cvssData\": {\"version\": \"2.0\", \"vectorString\": \"AV:N/AC:L/Au:N/C:N/I:N/A:P\", \"baseScore\": 5.0, \"accessVector\": \"NETWORK\", \"accessComplexity\": \"LOW\", \"authentication\": \"NONE\", \"confidentialityImpact\": \"NONE\", \"integrityImpact\": \"NONE\", \"availabilityImpact\": \"PARTIAL\"}, \"baseSeverity\": \"MEDIUM\", \"exploitabilityScore\": 10.0, \"impactScore\": 2.9, \"acInsufInfo\": false, \"obtainAllPrivilege\": false, \"obtainUserPrivilege\": false, \"obtainOtherPrivilege\": false, \"userInteractionRequired\": false}]}",
      "published": "2020-04-21T14:15:11.287",
      "references": "[{\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00004.html\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00011.html\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://packetstormsecurity.com/files/157527/OpenSSL-signature_algorithms_cert-Denial-Of-Service.html\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Third Party Advisory\", \"VDB Entry\"]}, {\"url\": \"http://seclists.org/fulldisclosure/2020/May/5\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"http://www.openwall.com/lists/oss-security/2020/04/22/2\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Mailing List\", \"Third Party Advisory\"]}, {\"url\": \"https://git.openssl.org/gitweb/?p=openssl.git%3Ba=commitdiff%3Bh=eb563247aef3e83dda7679c43f9649270462e5b1\", \"source\": \"openssl-security@openssl.org\"}, {\"url\": \"https://github.com/irsl/CVE-2020-1967\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Exploit\", \"Third Party Advisory\"]}, {\"url\": \"https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA44440\", \"source\": \"openssl-security@openssl.org\", \"tags\": [\"Third Party Advisory\"]}, {\"url\": \"https://lists.apache.org/thread.html/r66ea9c436da150683432db5fbc8beb8ae01886c6459ac30c2cea7345%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"openssl-security@openssl.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r94d6ac3f010a38fccf4f432b12180a13fa1cf303559bd805648c9064%40%3Cdev.tomcat.apache.org%3E\", \"source\": \"openssl-security@openssl.org\"}, {\"url\": \"https://lists.apache.org/thread.html/r9a41e304992ce6aec6585a87842b4f2e692604f5c892c37e3b0587ee%40%3Cdev.tomcat.apache.org%3E\", 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      "sourceIdentifier": "openssl-security@openssl.org",
      "vulnStatus": "Modified",
      "weaknesses": "[{\"source\": \"nvd@nist.gov\", \"type\": \"Primary\", \"description\": [{\"lang\": \"en\", \"value\": \"CWE-476\"}]}]"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2020-1967\",\"sourceIdentifier\":\"openssl-security@openssl.org\",\"published\":\"2020-04-21T14:15:11.287\",\"lastModified\":\"2024-11-21T05:11:45.023\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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).\"},{\"lang\":\"es\",\"value\":\"Las aplicaciones de Servidor o Cliente que llaman a la funci\u00f3n SSL_check_chain() durante o despu\u00e9s del protocolo de enlace de TLS versi\u00f3n 1.3,  puede bloquear debido a una desreferencia del puntero NULL como resultado de un manejo incorrecto de la extensi\u00f3n TLS \\\"signature_algorithms_cert\\\". El bloqueo ocurre si se recibe un algoritmo de firma no comprobada o ni reconocido del peer. Esto podr\u00eda ser explotado por un peer malicioso en un ataque de Denegaci\u00f3n de Servicio. OpenSSL versiones 1.1.1d, 1.1.1e y 1.1.1f est\u00e1n afectadas por este problema. Este problema no afectaba a OpenSSL versiones anteriores a la versi\u00f3n  1.1.1d. Corregido en OpenSSL versi\u00f3n 1.1.1g (Afectado en la versi\u00f3n 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  }
}


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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.