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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.

🗓️ 08 Oct 2021 07:00:00Reported by MicrosoftType 
mscve
 mscve🔗 msrc.microsoft.com

Curl 7.20.0 to 7.78.0 may bypass secure transport for IMAP, POP3, and FTP.

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Rows per page
Vulners
Node
microsoftcbl2_curl_7.82.0-1Range<7.82.0-1
OR
microsoftcm1_curl_7.76.0-6Range<7.76.0-6

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16 Dec 2021 08:00Current
7High risk
Vulners AI Score7
CVSS 25
CVSS 3.17.5
EPSS0.00063
SSVC
curl vulnerabilitysecurity bypasssecure transportinternet protocolsfile transfer protocol
0