CVE-2013-6422

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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
4 UNKNOWN
NETWORK
HIGH
AV:N/AC:H/Au:N/C:P/I:P/A:N
redhatCNA
---
---
CVEADP
---
---
Base Score
CVSS 3.x
EPSS Score
Percentile: 56%
VendorProductVersion
debiandebian_linux
7.0
canonicalubuntu_linux
12.04
canonicalubuntu_linux
12.10
canonicalubuntu_linux
13.04
canonicalubuntu_linux
13.10
haxxlibcurl
7.21.4
haxxlibcurl
7.21.5
haxxlibcurl
7.21.6
haxxlibcurl
7.21.7
haxxlibcurl
7.22.0
haxxlibcurl
7.23.0
haxxlibcurl
7.23.1
haxxlibcurl
7.24.0
haxxlibcurl
7.25.0
haxxlibcurl
7.26.0
haxxlibcurl
7.27.0
haxxlibcurl
7.28.0
haxxlibcurl
7.28.1
haxxlibcurl
7.29.0
haxxlibcurl
7.30.0
haxxlibcurl
7.31.0
haxxlibcurl
7.32.0
haxxlibcurl
7.33.0
𝑥
= Vulnerable software versions
Debian logo
Debian Releases
Debian Product
Codename
curl
bullseye
7.74.0-1.3+deb11u13
fixed
squeeze
not-affected
bullseye (security)
7.74.0-1.3+deb11u11
fixed
bookworm
7.88.1-10+deb12u7
fixed
bookworm (security)
7.88.1-10+deb12u5
fixed
sid
8.10.1-2
fixed
trixie
8.10.1-2
fixed
Ubuntu logo
Ubuntu Releases
Ubuntu Product
Codename
curl
saucy
Fixed 7.32.0-1ubuntu1.2
released
raring
Fixed 7.29.0-1ubuntu3.4
released
quantal
Fixed 7.27.0-1ubuntu1.7
released
precise
Fixed 7.22.0-3ubuntu4.6
released
lucid
not-affected