Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Debian | Debian Linux | 7.0 |
| Canonical | Ubuntu Linux | 12.04 |
| Haxx | Libcurl | 7.21.4 |
Related Weaknesses (CWE)
References
- http://curl.haxx.se/docs/adv_20131217.htmlVendor Advisory
- http://www.debian.org/security/2013/dsa-2824
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://www.ubuntu.com/usn/USN-2058-1
- https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
- http://curl.haxx.se/docs/adv_20131217.htmlVendor Advisory
- http://www.debian.org/security/2013/dsa-2824
- http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
- http://www.ubuntu.com/usn/USN-2058-1
- https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
FAQ
What is CVE-2013-6422?
CVE-2013-6422 is a vulnerability with a CVSS score of 4.0 (MEDIUM). 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 fiel...
How severe is CVE-2013-6422?
CVE-2013-6422 has been rated MEDIUM with a CVSS base score of 4.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2013-6422?
Check the references section above for vendor advisories and patch information. Affected products include: Debian Debian Linux, Canonical Ubuntu Linux, Haxx Libcurl.