Missing Initialization of Resource Affecting curl package, versions <7.74.0-1.3+deb11u2



    Attack Complexity High
    User Interaction Required
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3.1 low
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Red Hat
3.1 low
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5.3 medium

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  • Snyk ID SNYK-DEBIAN11-CURL-1296884
  • published 26 May 2021
  • disclosed 11 Jun 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.

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.