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Published: 26 May 2021

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.



CVSS 3 base score: 3.1


Package Release Status
Launchpad, Ubuntu, Debian
Released (7.77.0)
Ubuntu 21.10 (Impish Indri)
Released (7.74.0-1.2ubuntu4)
Ubuntu 21.04 (Hirsute Hippo)
Released (7.74.0-1ubuntu2.1)
Ubuntu 20.04 LTS (Focal Fossa)
Released (7.68.0-1ubuntu2.6)
Ubuntu 18.04 LTS (Bionic Beaver)
Released (7.58.0-2ubuntu3.14)
Ubuntu 16.04 ESM (Xenial Xerus) Needed

Ubuntu 14.04 ESM (Trusty Tahr) Needed