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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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade curlUpgrade libcurl-minimalUpgrade libcurl-develUpgrade libcurl | May 4, 2022 | Sep 29, 2021 |
| Alpine Linux | — | Upgrade curl | Aug 22, 2024 | Sep 29, 2021 |
| Amazon Linux Ami 2 | — | Upgrade curlUpgrade libcurl-develUpgrade curl-debuginfoUpgrade libcurl | Jul 4, 2022 | Sep 29, 2021 |
| Amazon_linux | — | Upgrade curl | Nov 16, 2021 | Sep 15, 2021 |
| Apple Osx Curl | — | Upgrade macOS to the latest version | Mar 18, 2022 | Mar 14, 2022 |
| Centos_linux | — | Upgrade libcurl-minimalUpgrade libcurl-minimal-debuginfoUpgrade curl-minimal-debuginfoUpgrade curl-debuginfoUpgrade curlUpgrade libcurl-develUpgrade curl-debugsourceUpgrade libcurlUpgrade libcurl-debuginfo | Nov 9, 2021 | Nov 2, 2021 |
| Debian | — | Upgrade curl | Nov 29, 2021 | Sep 29, 2021 |
| Freebsd | — | Upgrade mysql-connector-odbcUpgrade mysql-connector-javaUpgrade mysql-connector-java51Upgrade mysql-server80Upgrade mysql-connector-c++Upgrade mysql-server55Upgrade mysql-server56Upgrade mysql-server57Upgrade curl | Nov 4, 2022 | Sep 17, 2021 |
| Gentoo Linux | — | Upgrade net-misc/curl. | Dec 19, 2022 | Sep 29, 2021 |
| Huawei Euleros 2_0_sp10 | — | Upgrade curlUpgrade libcurl | Feb 28, 2022 | Sep 29, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade libcurlUpgrade libcurl-develUpgrade curl | Dec 28, 2021 | Sep 29, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade libcurlUpgrade curl | Jan 28, 2022 | Sep 29, 2021 |
| Oracle Mysql | — | Upgrade to MySQL version 5.7.37Upgrade to MySQL version 8.0.28 | Jun 15, 2026 | Sep 29, 2021 |
| Oracle Solaris | — | Upgrade web/curl to version 7.79.0-11.4.39.0.1.107.0 on Solaris 11.4 | Nov 17, 2021 | Nov 17, 2021 |
| Oracle_linux | — | Upgrade curlUpgrade libcurl-develUpgrade libcurl-minimalUpgrade libcurl | Nov 3, 2021 | Sep 15, 2021 |
| Redhat_linux | — | Upgrade libcurl-develUpgrade curlUpgrade curl-debugsourceUpgrade libcurl-debuginfoUpgrade libcurl-minimalNo solution existsUpgrade curl-minimal-debuginfoUpgrade libcurl-minimal-debuginfoUpgrade curl-debuginfoUpgrade libcurl | Nov 9, 2021 | Nov 2, 2021 |
| Rocky_linux | — | Upgrade curl-debugsourceUpgrade curl-debuginfoUpgrade libcurl-debuginfoUpgrade libcurl-minimal-debuginfoUpgrade curlUpgrade libcurl-develUpgrade libcurl-minimalUpgrade libcurl | May 5, 2022 | Sep 29, 2021 |
| Splunk | — | Upgrade Splunk Enterprise to version 8.2.11Upgrade Splunk Universal Forwarder to version 8.2.11Upgrade Splunk Universal Forwarder to version 8.1.14Upgrade Splunk Universal Forwarder to version 9.0.5Upgrade Splunk Universal Forwarder to version 8.2.12Upgrade Splunk Enterprise to version 9.0.5Upgrade Splunk Enterprise to version 8.2.12Upgrade Splunk Universal Forwarder to version 9.1.1Upgrade Splunk Enterprise to version 9.0.6Upgrade Splunk Enterprise to version 9.1.1Upgrade Splunk Enterprise to version 8.1.14Upgrade Splunk Universal Forwarder to version 9.0.6 | Sep 30, 2025 | Sep 29, 2021 |
| Suse | — | Upgrade libcurl4-openssl1-x86Upgrade libcurl4-miniUpgrade libcurl4-32bitUpgrade libcurl4-openssl1Upgrade libcurl-devel-32bitUpgrade libcurl4-openssl1-32bitUpgrade curlUpgrade libcurl-develUpgrade libcurl4Upgrade libcurl-mini-develUpgrade curl-miniUpgrade curl-openssl1 | Sep 24, 2021 | Sep 15, 2021 |
| Ubuntu | — | Upgrade curlUpgrade libcurl3-nss (Ubuntu Pro)Upgrade libcurl3-nssUpgrade libcurl3-gnutlsUpgrade curl (Ubuntu Pro)Upgrade libcurl4Upgrade libcurl3-gnutls (Ubuntu Pro)Upgrade libcurl3 (Ubuntu Pro) | Sep 16, 2021 | Sep 15, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Sep 29, 2021 |
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