FKIE_CVE-2021-22946

Vulnerability from fkie_nvd - Published: 2021-09-29 20:15 - Updated: 2026-10-14 12:17
Summary
A user can tell curl >= 7.20.0 and <= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.
References
support@hackerone.comhttp://seclists.org/fulldisclosure/2022/Mar/29Mailing List, Third Party Advisory
support@hackerone.comhttps://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
support@hackerone.comhttps://hackerone.com/reports/1334111Exploit, Issue Tracking, Patch, Third Party Advisory
support@hackerone.comhttps://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing List, Third Party Advisory
support@hackerone.comhttps://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing List, Third Party Advisory
support@hackerone.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing List, Third Party Advisory
support@hackerone.comhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing List, Third Party Advisory
support@hackerone.comhttps://security.gentoo.org/glsa/202212-01Third Party Advisory
support@hackerone.comhttps://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory
support@hackerone.comhttps://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory
support@hackerone.comhttps://support.apple.com/kb/HT213183Release Notes, Third Party Advisory
support@hackerone.comhttps://www.debian.org/security/2022/dsa-5197Third Party Advisory
support@hackerone.comhttps://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
support@hackerone.comhttps://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory
support@hackerone.comhttps://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
support@hackerone.comhttps://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108http://seclists.org/fulldisclosure/2022/Mar/29Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://hackerone.com/reports/1334111Exploit, Issue Tracking, Patch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.gentoo.org/glsa/202212-01Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.apple.com/kb/HT213183Release Notes, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.debian.org/security/2022/dsa-5197Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-146325.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-389290.html
0b142b55-0307-4c5a-b3c9-f314f3fb7c5ehttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
Impacted products
Vendor Product Version
haxx curl *
debian debian_linux 9.0
debian debian_linux 10.0
debian debian_linux 11.0
fedoraproject fedora 33
fedoraproject fedora 35
netapp cloud_backup -
netapp clustered_data_ontap -
netapp oncommand_insight -
netapp oncommand_workflow_automation -
netapp snapcenter -
netapp h300s_firmware -
netapp h300s -
netapp h500s_firmware -
netapp h500s -
netapp h700s_firmware -
netapp h700s -
netapp h300e_firmware -
netapp h300e -
netapp h500e_firmware -
netapp h500e -
netapp h700e_firmware -
netapp h700e -
netapp h410s_firmware -
netapp h410s -
netapp solidfire_baseboard_management_controller_firmware -
netapp solidfire_baseboard_management_controller -
oracle communications_cloud_native_core_binding_support_function 1.11.0
oracle communications_cloud_native_core_network_function_cloud_native_environment 1.10.0
oracle communications_cloud_native_core_network_repository_function 1.15.0
oracle communications_cloud_native_core_network_repository_function 1.15.1
oracle communications_cloud_native_core_network_slice_selection_function 1.8.0
oracle communications_cloud_native_core_service_communication_proxy 1.15.0
oracle mysql_server *
oracle mysql_server *
oracle peoplesoft_enterprise_peopletools 8.57
oracle peoplesoft_enterprise_peopletools 8.58
oracle peoplesoft_enterprise_peopletools 8.59
apple macos *
siemens sinec_infrastructure_network_services *
oracle commerce_guided_search 11.3.2
oracle communications_cloud_native_core_binding_support_function 22.1.3
oracle communications_cloud_native_core_console 22.2.0
oracle communications_cloud_native_core_network_repository_function 22.1.0
oracle communications_cloud_native_core_network_repository_function 22.2.0
oracle communications_cloud_native_core_security_edge_protection_proxy 22.1.1
splunk universal_forwarder *
splunk universal_forwarder *
splunk universal_forwarder 9.1.0

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      "lang": "en",
      "value": "A user can tell curl \u003e= 7.20.0 and \u003c= 7.78.0 to require a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the command line or`CURLOPT_USE_SSL` set to `CURLUSESSL_CONTROL` or `CURLUSESSL_ALL` withlibcurl). This requirement could be bypassed if the server would return a properly crafted but perfectly legitimate response.This flaw would then make curl silently continue its operations **withoutTLS** contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network."
    },
    {
      "lang": "es",
      "value": "Un usuario puede decirle a curl versiones posteriores a 7.20.0 incluy\u00e9ndola , y versiones anteriores a 7.78.0 incluy\u00e9ndola, que requiera una actualizaci\u00f3n con \u00e9xito a TLS cuando hable con un servidor IMAP, POP3 o FTP (\"--ssl-reqd\" en la l\u00ednea de comandos o \"CURLOPT_USE_SSL\" configurado como \"CURLUSESSL_CONTROL\" o \"CURLUSESSL_ALL\" conlibcurl). Este requisito podr\u00eda ser omitido si el servidor devolviera una respuesta correctamente dise\u00f1ada pero perfectamente leg\u00edtima. Este fallo har\u00eda que curl continuara silenciosamente sus operaciones **withoutTLS** en contra de las instrucciones y expectativas, exponiendo posiblemente datos confidenciales en texto sin cifrar a trav\u00e9s de la red"
    }
  ],
  "id": "CVE-2021-22946",
  "lastModified": "2026-10-14T12:17:08.943",
  "metrics": {
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        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
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        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
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          "role": "CISA Coordinator",
          "timestamp": "2026-04-16T13:53:35.942299Z",
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}



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Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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