Vulnerability Name:

CVE-2013-6422 (CCN-89940)

Assigned:2013-12-17
Published:2013-12-17
Updated:2016-04-07
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.
CVSS v3 Severity:5.3 Medium (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Exploitability Metrics:Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope:Scope (S): Unchanged
Impact Metrics:Confidentiality (C): None
Integrity (I): Low
Availibility (A): None
CVSS v2 Severity:4.0 Medium (CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N)
3.0 Low (Temporal CVSS v2 Vector: AV:N/AC:H/Au:N/C:P/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): High
Authentication (Au): None
Impact Metrics:Confidentiality (C): Partial
Integrity (I): Partial
Availibility (A): None
4.3 Medium (CCN CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N)
3.2 Low (CCN Temporal CVSS v2 Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N/E:U/RL:OF/RC:C)
Exploitability Metrics:Access Vector (AV): Network
Access Complexity (AC): Medium
Athentication (Au): None
Impact Metrics:Confidentiality (C): None
Integrity (I): Partial
Availibility (A): None
Vulnerability Type:CWE-20
Vulnerability Consequences:Gain Access
References:Source: CCN
Type: cURL Web Site
cURL

Source: CCN
Type: cURL Security Advisory, December 17th 2013
libcurl cert name check ignore GnuTLS

Source: CONFIRM
Type: Vendor Advisory
http://curl.haxx.se/docs/adv_20131217.html

Source: MITRE
Type: CNA
CVE-2013-6422

Source: DEBIAN
Type: UNKNOWN
DSA-2824

Source: CONFIRM
Type: UNKNOWN
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html

Source: CCN
Type: BID-64431
cURL/libcURL SSL Certificate Host Name Validation Security Bypass Vulnerability

Source: UBUNTU
Type: UNKNOWN
USN-2058-1

Source: XF
Type: UNKNOWN
curl-cve20136422-spoofing(89940)

Source: HP
Type: UNKNOWN
HPSBMU03112

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2013-6422

Vulnerable Configuration:Configuration 1:
  • cpe:/o:debian:debian_linux:7.0:*:*:*:*:*:*:*

    • Configuration 2:
  • cpe:/o:canonical:ubuntu_linux:12.04:-:lts:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:12.10:*:*:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:13.04:*:*:*:*:*:*:*
  • OR cpe:/o:canonical:ubuntu_linux:13.10:*:*:*:*:*:*:*

    • Configuration 3:
  • cpe:/a:haxx:libcurl:7.21.4:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.21.5:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.21.6:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.21.7:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.22.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.23.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.23.1:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.24.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.25.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.26.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.27.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.28.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.28.1:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.29.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.30.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.31.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.32.0:*:*:*:*:*:*:*
  • OR cpe:/a:haxx:libcurl:7.33.0:*:*:*:*:*:*:*

    • Configuration CCN 1:
  • cpe:/a:curl:libcurl:7.21.0:*:*:*:*:*:*:*
  • OR cpe:/a:curl:libcurl:7.22.0:*:*:*:*:*:*:*
  • OR cpe:/a:curl:libcurl:7.23.0:*:*:*:*:*:*:*

    • * Denotes that component is vulnerable
    Oval Definitions
    Definition IDClassTitleLast Modified
    oval:org.mitre.oval:def:20581
    P
    		USN-2058-1 -- curl vulnerability
    2014-06-30
    oval:org.mitre.oval:def:20136
    P
    		DSA-2824-1 curl - unchecked tls/ssl certificate host name
    2014-06-23
    oval:com.ubuntu.precise:def:20136422000
    V
    		CVE-2013-6422 on Ubuntu 12.04 LTS (precise) - medium.
    2013-12-23
    BACK
    debian debian linux 7.0
    canonical ubuntu linux 12.04 -
    canonical ubuntu linux 12.10
    canonical ubuntu linux 13.04
    canonical ubuntu linux 13.10
    haxx libcurl 7.21.4
    haxx libcurl 7.21.5
    haxx libcurl 7.21.6
    haxx libcurl 7.21.7
    haxx libcurl 7.22.0
    haxx libcurl 7.23.0
    haxx libcurl 7.23.1
    haxx libcurl 7.24.0
    haxx libcurl 7.25.0
    haxx libcurl 7.26.0
    haxx libcurl 7.27.0
    haxx libcurl 7.28.0
    haxx libcurl 7.28.1
    haxx libcurl 7.29.0
    haxx libcurl 7.30.0
    haxx libcurl 7.31.0
    haxx libcurl 7.32.0
    haxx libcurl 7.33.0
    curl libcurl 7.21.0
    curl libcurl 7.22.0
    curl libcurl 7.23.0