CVE-2021-22946

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.

• CWE-325
• CWE-319
• CWE-319

• http://seclists.org/fulldisclosure/2022/Mar/29Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
• https://hackerone.com/reports/1334111Exploit, Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202212-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory
• https://support.apple.com/kb/HT213183Release Notes, Third Party Advisory
• https://www.debian.org/security/2022/dsa-5197Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory
• http://seclists.org/fulldisclosure/2022/Mar/29Mailing List, Third Party Advisory
• https://cert-portal.siemens.com/productcert/pdf/ssa-389290.pdfPatch, Third Party Advisory
• https://hackerone.com/reports/1334111Exploit, Issue Tracking, Patch, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/09/msg00022.htmlMailing List, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2022/08/msg00017.htmlMailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/APOAK4X73EJTAPTSVT7IRVDMUWVXNWGD/Mailing List, Third Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RWLEC6YVEM2HWUBX67SDGPSY4CQB72OE/Mailing List, Third Party Advisory
• https://security.gentoo.org/glsa/202212-01Third Party Advisory
• https://security.netapp.com/advisory/ntap-20211029-0003/Third Party Advisory
• https://security.netapp.com/advisory/ntap-20220121-0008/Third Party Advisory
• https://support.apple.com/kb/HT213183Release Notes, Third Party Advisory
• https://www.debian.org/security/2022/dsa-5197Third Party Advisory
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujan2022.htmlThird Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpuoct2021.htmlPatch, Third Party Advisory

Published

Sep 29, 2021

Last Modified

Jun 17, 2026

Status

Modified

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• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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