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.

Read the notes from the security team

• How can I get the fixes?
• What do statuses mean?

Notes

References

• MITRE
• NVD
• Launchpad
• Debian

Related Ubuntu Security Notices (USN)

• USN-2058-1
• curl vulnerability
• 18 December 2013

Other references

• http://curl.haxx.se/docs/adv_20131217.html
• https://www.cve.org/CVERecord?id=CVE-2013-6422