| 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, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, 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+deb10u9 | fixed |
| bullseye (security), bullseye | 7.74.0-1.3+deb11u11 | fixed |
| bookworm, bookworm (security) | 7.88.1-10+deb12u5 | fixed |
| trixie | 8.5.0-2 | fixed |
| sid | 8.7.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| curl | source | squeeze | (not affected) | | | |
| curl | source | wheezy | 7.26.0-1+wheezy7 | | DSA-2824-1 | |
| curl | source | (unstable) | 7.34.0-1 | | | |
Notes
[squeeze] - curl <not-affected> (issue introduced with 59cf93cc, 7.21.4)