CVE-2013-6422

Name	CVE-2013-6422
Description	The GnuTLS backend in libcurl 7.21.4 through 7.33.0, when disabling digital signature verification (CURLOPT_SSL_VERIFYPEER), also disables the CURLOPT_SSL_VERIFYHOST check for CN or SAN host name fields, which makes it easier for remote attackers to spoof servers and conduct man-in-the-middle (MITM) attacks.
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)
References	DSA-2824-1

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+deb10u6	fixed
	bullseye (security), bullseye	7.74.0-1.3+deb11u7	fixed
	bookworm, sid	7.88.1-10	fixed

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

Package	Type	Release	Fixed Version	Origin
curl	source	squeeze	(not affected)
curl	source	wheezy	7.26.0-1+wheezy7	DSA-2824-1
curl	source	(unstable)	7.34.0-1

[squeeze] - curl <not-affected> (issue introduced with 59cf93cc, 7.21.4)