CVE-2013-6422
MEDIUM severity · CVSS 4 · Improper input validation
4CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityHigh
Privileges required—
User interaction—
Confidentiality impact—
Integrity impact—
Availability impactNone
Exploit probability (EPSS)3%
AV:N/AC:H/Au:N/C:P/I:P/A:N
Affected products we track (1)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.