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curl 7.7 through 7.76.1 suffers from an information disclosure when the `-t` command line option, known as `CURLOPT_TELNETOPTIONS` in libcurl, is used to send variable=content pairs to TELNET servers. Due to a flaw in the option parser for sending NEW_ENV variables, libcurl could be made to pass on uninitialized data from a stack based buffer to the server, resulting in potentially revealing sensitive internal information to the server using a clear-text network protocol.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade libcurl-minimalUpgrade curlUpgrade libcurl-develUpgrade libcurl | May 4, 2022 | Jun 11, 2021 |
| Alpine Linux | — | Upgrade curl | Mar 26, 2024 | Jun 11, 2021 |
| Amazon Linux Ami 2 | — | Upgrade curl-debuginfoUpgrade curlUpgrade libcurl-develUpgrade libcurl | Jun 24, 2021 | Jun 11, 2021 |
| Amazon_linux | — | Upgrade curl | Jul 13, 2021 | May 26, 2021 |
| Arch Linux | — | Upgrade to the latest version of Arch Linux | Jul 11, 2025 | Jun 11, 2021 |
| Centos_linux | — | Upgrade libcurl-minimal-debuginfoUpgrade libcurl-minimalUpgrade libcurl-develUpgrade curlUpgrade curl-debuginfoUpgrade curl-minimal-debuginfoUpgrade libcurlUpgrade curl-debugsourceUpgrade libcurl-debuginfo | Nov 10, 2021 | Jun 11, 2021 |
| Debian | — | Upgrade curl | Aug 16, 2021 | Jun 11, 2021 |
| Gentoo Linux | — | Upgrade net-misc/curl. | May 28, 2021 | May 26, 2021 |
| Huawei Euleros 2_0_sp2 | — | Upgrade libcurlUpgrade curlUpgrade libcurl-devel | Sep 16, 2021 | Jun 11, 2021 |
| Huawei Euleros 2_0_sp3 | — | Upgrade curlUpgrade libcurlUpgrade libcurl-devel | Oct 26, 2021 | Jun 11, 2021 |
| Huawei Euleros 2_0_sp5 | — | Upgrade libcurlUpgrade curlUpgrade libcurl-devel | Sep 7, 2021 | Jun 11, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade curlUpgrade libcurl-develUpgrade libcurl | Aug 10, 2021 | Jun 11, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade curlUpgrade libcurl | Aug 10, 2021 | Jun 11, 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 | Jun 11, 2021 |
| Oracle_linux | — | Upgrade libcurl-minimalUpgrade curlUpgrade libcurl-develUpgrade libcurl | Nov 17, 2021 | May 26, 2021 |
| Redhat_linux | — | Upgrade libcurl-debuginfoUpgrade curl-debuginfoUpgrade curlUpgrade libcurl-develUpgrade libcurlUpgrade curl-debugsourceUpgrade libcurl-minimalNo solution existsUpgrade libcurl-minimal-debuginfoUpgrade curl-minimal-debuginfo | Nov 10, 2021 | Jun 11, 2021 |
| Rocky_linux | — | Upgrade libcurl-develUpgrade libcurlUpgrade curl-debuginfoUpgrade curl-debugsourceUpgrade libcurl-debuginfoUpgrade libcurl-minimalUpgrade libcurl-minimal-debuginfoUpgrade curl | Mar 12, 2024 | Jun 11, 2021 |
| Splunk | — | Upgrade Splunk Enterprise to version 9.1.1Upgrade Splunk Enterprise to version 9.0.5Upgrade Splunk Universal Forwarder to version 9.0.5Upgrade Splunk Enterprise to version 9.0.6Upgrade Splunk Enterprise to version 8.2.11Upgrade Splunk Enterprise to version 8.2.12Upgrade Splunk Enterprise to version 8.1.14Upgrade Splunk Universal Forwarder to version 9.1.1Upgrade Splunk Universal Forwarder to version 8.2.11Upgrade Splunk Universal Forwarder to version 9.0.6Upgrade Splunk Universal Forwarder to version 8.2.12Upgrade Splunk Universal Forwarder to version 8.1.14 | Sep 30, 2025 | Jun 11, 2021 |
| Suse | — | Upgrade libcurl4-32bitUpgrade libcurl4-miniUpgrade curlUpgrade libcurl-develUpgrade libcurl4Upgrade libcurl-mini-develUpgrade curl-miniUpgrade libcurl-devel-32bitUpgrade libcurl4-openssl1-32bitUpgrade libcurl4-openssl1Upgrade curl-openssl1Upgrade libcurl4-openssl1-x86 | May 27, 2021 | May 26, 2021 |
| Ubuntu | — | Upgrade libcurl3 (Ubuntu Pro)Upgrade curl (Ubuntu Pro)Upgrade libcurl3-gnutlsUpgrade curlUpgrade libcurl3-nss (Ubuntu Pro)Upgrade libcurl3-nssUpgrade libcurl4Upgrade libcurl3-gnutls (Ubuntu Pro) | Jul 23, 2021 | May 26, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jun 11, 2021 |
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