NA

CVE-2021-22946

Vulnerability Summary

A security issue was found in curl prior to 7.79.0. A user can tell curl 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 with libcurl). 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 without TLS contrary to the instructions and expectations, exposing possibly sensitive data in clear text over the network.

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Vulnerability Trend

Vendor Advisories

A security issue was found in curl before 7790 A user can tell curl 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 with libcurl) This requirement could be bypassed if the server would return a properly crafted but ...

Mailing Lists

Protocol downgrade required TLS bypassed ======================================== Project curl Security Advisory, September 15th 2021 - [Permalink](curlse/docs/CVE-2021-22946html) VULNERABILITY ------------- A user can tell curl to **require** a successful upgrade to TLS when speaking to an IMAP, POP3 or FTP server (`--ssl-reqd` on the ...