Vulnerability Monitor

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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.

Published

2013-12-23T22:55:02.943

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 4.0 (MEDIUM)

CVSSv2 Vector

AV:N/AC:H/Au:N/C:P/I:P/A:N

  • Access Vector: NETWORK
  • Access Complexity: HIGH
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: PARTIAL
  • Availability Impact: NONE
Exploitability Score

4.9

Impact Score

4.9

Weaknesses
  • Type: Primary
    CWE-20
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Operating System debian debian_linux 7.0 Yes
Operating System canonical ubuntu_linux 12.04 Yes
Operating System canonical ubuntu_linux 12.10 Yes
Operating System canonical ubuntu_linux 13.04 Yes
Operating System canonical ubuntu_linux 13.10 Yes
Application haxx libcurl 7.21.4 Yes
Application haxx libcurl 7.21.5 Yes
Application haxx libcurl 7.21.6 Yes
Application haxx libcurl 7.21.7 Yes
Application haxx libcurl 7.22.0 Yes
Application haxx libcurl 7.23.0 Yes
Application haxx libcurl 7.23.1 Yes
Application haxx libcurl 7.24.0 Yes
Application haxx libcurl 7.25.0 Yes
Application haxx libcurl 7.26.0 Yes
Application haxx libcurl 7.27.0 Yes
Application haxx libcurl 7.28.0 Yes
Application haxx libcurl 7.28.1 Yes
Application haxx libcurl 7.29.0 Yes
Application haxx libcurl 7.30.0 Yes
Application haxx libcurl 7.31.0 Yes
Application haxx libcurl 7.32.0 Yes
Application haxx libcurl 7.33.0 Yes
References