CVE-2021-22925

Name	CVE-2021-22925
Description	curl supports the `-t` command line option, known as `CURLOPT_TELNETOPTIONS`in libcurl. This rarely used option is used to send variable=content pairs toTELNET servers.Due to flaw in the option parser for sending `NEW_ENV` variables, libcurlcould be made to pass on uninitialized data from a stack based buffer to theserver. Therefore potentially revealing sensitive internal information to theserver using a clear-text network protocol.This could happen because curl did not call and use sscanf() correctly whenparsing the string provided by the application.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
curl (PTS)	buster	7.64.0-4+deb10u2	fixed
	buster (security)	7.64.0-4+deb10u4	fixed
	bullseye	7.74.0-1.3+deb11u3	fixed
	bullseye (security)	7.74.0-1.3+deb11u5	fixed
	bookworm, sid	7.87.0-2	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
curl	source	(unstable)	(not affected)

Notes

- curl <not-affected> (Incomplete fix for CVE-2021-22898 not applied)
https://curl.se/docs/CVE-2021-22925.html
Introduced by: https://github.com/curl/curl/commit/a1d6ad26100bc493c7b04f1301b1634b7f5aa8b4 (curl-7_7_alpha2)
Fixed by: https://github.com/curl/curl/commit/894f6ec730597eb243618d33cc84d71add8d6a8a (curl-7_78_0)
https://www.openwall.com/lists/oss-security/2021/07/21/4
CVE is assigned because previous attempt to address CVE-2021-22898 resulted to be
insufficient and the security vulnerability remained.