|Description||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.|
|Source||CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)|
Vulnerable and fixed packages
The table below lists information on source packages.
|curl (PTS)||jessie, jessie (lts)||7.38.0-4+deb8u22||fixed|
|buster, buster (security)||7.64.0-4+deb10u2||vulnerable|
The information below is based on the following data on fixed versions.
[bullseye] - curl <no-dsa> (Minor issue)
[buster] - curl <no-dsa> (Minor issue)
Introduced by: https://github.com/curl/curl/commit/a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 (7.7)
Fixed by: https://github.com/curl/curl/commit/39ce47f219b09c380b81f89fe54ac586c8db6bde (7.77.0)
Followup to not make curl vulnerable to CVE-2021-22925: