Unscored severity · published Dec 23, 2013
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…
–
CVSS
2.8%
EPSS
No
On KEV
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.
Exploitation
Is it being used?
Exploit prediction (EPSS)2.8% · higher than 86% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
DL
Debian Linux · Debian
7.0 · source: NVD
LI
Libcurl · Haxx
7.21.4; 7.21.5; 7.21.6; 7.21.7; 7.22.0; 7.23.0; +12 more · source: NVD
UL
Ubuntu Linux · Canonical
12.04; 12.10; 13.04; 13.10 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2013-6422
CVE.org
https://www.cve.org/CVERecord?id=CVE-2013-6422
Vendor Advisory
http://curl.haxx.se/docs/adv_20131217.html
www.debian.org
http://www.debian.org/security/2013/dsa-2824
www.oracle.com
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
www.ubuntu.com
http://www.ubuntu.com/usn/USN-2058-1
h20564.www2.hp.com
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
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