CVE-2013-6422

Severity Score

4.0

*CVSS v2

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

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.

El backend de GnuTLS en libcurl 7.21.4 a 7.33.0, cuando se desactiva la verificación de firmas digitales (CURLOPT_SSL_VERIFYPEER), también desactiva la comprobación CURLOPT_SSL_VERIFYHOST para nombres de host CN o SAN, lo cual facilita a atacantes remotos la suplantación de servidores y la ejecución de ataques man-in-the-middle (MITM).

*Credits: N/A

CVSS Scores

NISTv2 4.0

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2013-11-04 CVE Reserved
2013-12-19 CVE Published
2023-03-07 EPSS Updated
2024-08-06 CVE Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-20: Improper Input Validation

CAPEC

References (5)

URL	Tag	Source
http://www.oracle.com/technetwork/topics/security/cpujul2015-2367936.html	X_refsource_confirm

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://curl.haxx.se/docs/adv_20131217.html	2016-04-07
http://www.debian.org/security/2013/dsa-2824	2016-04-07
http://www.ubuntu.com/usn/USN-2058-1	2016-04-07
https://h20564.www2.hp.com/hpsc/doc/public/display?docId=emr_na-c04463322	2016-04-07

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Debian Search vendor "Debian"		Debian Linux Search vendor "Debian" for product "Debian Linux"				7.0 Search vendor "Debian" for product "Debian Linux" and version "7.0"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.04"		lts		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				12.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "12.10"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				13.04 Search vendor "Canonical" for product "Ubuntu Linux" and version "13.04"		-		Affected
Canonical Search vendor "Canonical"		Ubuntu Linux Search vendor "Canonical" for product "Ubuntu Linux"				13.10 Search vendor "Canonical" for product "Ubuntu Linux" and version "13.10"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.21.4 Search vendor "Haxx" for product "Libcurl" and version "7.21.4"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.21.5 Search vendor "Haxx" for product "Libcurl" and version "7.21.5"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.21.6 Search vendor "Haxx" for product "Libcurl" and version "7.21.6"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.21.7 Search vendor "Haxx" for product "Libcurl" and version "7.21.7"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.22.0 Search vendor "Haxx" for product "Libcurl" and version "7.22.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.23.0 Search vendor "Haxx" for product "Libcurl" and version "7.23.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.23.1 Search vendor "Haxx" for product "Libcurl" and version "7.23.1"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.24.0 Search vendor "Haxx" for product "Libcurl" and version "7.24.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.25.0 Search vendor "Haxx" for product "Libcurl" and version "7.25.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.26.0 Search vendor "Haxx" for product "Libcurl" and version "7.26.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.27.0 Search vendor "Haxx" for product "Libcurl" and version "7.27.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.28.0 Search vendor "Haxx" for product "Libcurl" and version "7.28.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.28.1 Search vendor "Haxx" for product "Libcurl" and version "7.28.1"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.29.0 Search vendor "Haxx" for product "Libcurl" and version "7.29.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.30.0 Search vendor "Haxx" for product "Libcurl" and version "7.30.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.31.0 Search vendor "Haxx" for product "Libcurl" and version "7.31.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.32.0 Search vendor "Haxx" for product "Libcurl" and version "7.32.0"		-		Affected
Haxx Search vendor "Haxx"		Libcurl Search vendor "Haxx" for product "Libcurl"				7.33.0 Search vendor "Haxx" for product "Libcurl" and version "7.33.0"		-		Affected