Cleartext Transmission of Sensitive Information Affecting curl package, versions <7.74.0-1.3+deb11u2



    Attack Complexity Low
    Confidentiality High
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7.5 high
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5.9 medium
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Red Hat
7.5 high

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  • Snyk ID SNYK-DEBIAN11-CURL-1585138
  • published 15 Sep 2021
  • disclosed 29 Sep 2021

How to fix?

Upgrade Debian:11 curl to version 7.74.0-1.3+deb11u2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Debian:11. See How to fix? for Debian:11 relevant fixed versions and status.

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 orCURLOPT_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.