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CVE-2013-6422

Date: December 23, 2013

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.

Language: C

Severity Score

Related Resources (9)

https://nvd.nist.gov/vuln/detail/CVE-2013-6422
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322
http://www.ubuntu.com/usn/USN-2058-1
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html
http://www.debian.org/security/2013/dsa-2824
http://curl.haxx.se/docs/adv_20131217.html
https://people.canonical.com/~ubuntu-security/cve/CVE-2013-6422
https://security-tracker.debian.org/tracker/CVE-2013-6422
https://www.mend.io/vulnerability-database/CVE-2013-6422

Severity Score

Weakness Type (CWE)

Improper Validation of Certificate with Host Mismatch

CWE-297

Improper Input Validation

CWE-20

CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): HIGH
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): LOW
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): HIGH
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): PARTIAL
Availability (A): NONE
Additional information:

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