CVE-2021-22946

Name	CVE-2021-22946
Description	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 or`CURLOPT_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.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
References	DLA-2773-1, DLA-3085-1, DSA-5197-1, ELA-494-1
Debian Bugs	1017589

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
curl (PTS)	jessie, jessie (lts)	7.38.0-4+deb8u27	fixed
	stretch (security)	7.52.1-5+deb9u16	fixed
	stretch (lts), stretch	7.52.1-5+deb9u21	fixed
	buster	7.64.0-4+deb10u2	vulnerable
	buster (security)	7.64.0-4+deb10u9	fixed
	bullseye (security), bullseye	7.74.0-1.3+deb11u11	fixed
	bookworm (security), bookworm	7.88.1-10+deb12u5	fixed
	trixie	8.5.0-2	fixed
	sid	8.7.1-3	fixed

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

Package	Type	Release	Fixed Version	Origin	Debian Bugs
curl	source	jessie	7.38.0-4+deb8u22	ELA-494-1
curl	source	stretch	7.52.1-5+deb9u16	DLA-2773-1
curl	source	buster	7.64.0-4+deb10u3	DLA-3085-1
curl	source	bullseye	7.74.0-1.3+deb11u2	DSA-5197-1
curl	source	(unstable)	7.79.1-1		1017589

https://curl.se/docs/CVE-2021-22946.html
Fixed by: https://github.com/curl/curl/commit/364f174724ef115c63d5e5dc1d3342c8a43b1cca (curl-7_79_0)