CVE-2016-3739

Severity Score

5.3

*CVSS v3

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

The (1) mbed_connect_step1 function in lib/vtls/mbedtls.c and (2) polarssl_connect_step1 function in lib/vtls/polarssl.c in cURL and libcurl before 7.49.0, when using SSLv3 or making a TLS connection to a URL that uses a numerical IP address, allow remote attackers to spoof servers via an arbitrary valid certificate.

Las funciones (1) mbed_connect_step1 en lib/vtls/mbedtls.c y (2) polarssl_connect_step1 en lib/vtls/polarssl.c en cURL y libcurl en versiones anteriores 7.49.0, cuando usan SSLv3 o hacen una conexión TSL a una URL que usa una dirección IP numérica, permiten a atacantes remotos engañar a los servidores a través de un certificado arbitrario válido.

*Credits: N/A

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

None

Integrity

High

Availability

None

Attack Vector

Network

Attack Complexity

High

Authentication

None

Confidentiality

None

Integrity

Partial

Availability

None

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2016-03-30 CVE Reserved
2016-05-20 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 (11)

URL	Tag	Source
http://www.openwall.com/lists/oss-security/2024/03/27/4	Mailing List
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
http://www.securityfocus.com/bid/90726	Vdb Entry
http://www.securitytracker.com/id/1035907	Vdb Entry
https://curl.haxx.se/changes.html#7_49_0
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722

URL	Date	SRC

URL	Date	SRC

URL	Date	SRC
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349	2024-05-01
https://curl.haxx.se/CVE-2016-3739.patch	2024-05-01
https://curl.haxx.se/docs/adv_20160518.html	2024-05-01
https://security.gentoo.org/glsa/201701-47	2024-05-01

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.0 Search vendor "Haxx" for product "Curl" and version "7.21.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.1 Search vendor "Haxx" for product "Curl" and version "7.21.1"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.2 Search vendor "Haxx" for product "Curl" and version "7.21.2"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.3 Search vendor "Haxx" for product "Curl" and version "7.21.3"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.4 Search vendor "Haxx" for product "Curl" and version "7.21.4"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.5 Search vendor "Haxx" for product "Curl" and version "7.21.5"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.6 Search vendor "Haxx" for product "Curl" and version "7.21.6"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.21.7 Search vendor "Haxx" for product "Curl" and version "7.21.7"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.22.0 Search vendor "Haxx" for product "Curl" and version "7.22.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.23.0 Search vendor "Haxx" for product "Curl" and version "7.23.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.23.1 Search vendor "Haxx" for product "Curl" and version "7.23.1"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.24.0 Search vendor "Haxx" for product "Curl" and version "7.24.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.25.0 Search vendor "Haxx" for product "Curl" and version "7.25.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.26.0 Search vendor "Haxx" for product "Curl" and version "7.26.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.27.0 Search vendor "Haxx" for product "Curl" and version "7.27.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.28.0 Search vendor "Haxx" for product "Curl" and version "7.28.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.28.1 Search vendor "Haxx" for product "Curl" and version "7.28.1"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.29.0 Search vendor "Haxx" for product "Curl" and version "7.29.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.30.0 Search vendor "Haxx" for product "Curl" and version "7.30.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.31.0 Search vendor "Haxx" for product "Curl" and version "7.31.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.32.0 Search vendor "Haxx" for product "Curl" and version "7.32.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.33.0 Search vendor "Haxx" for product "Curl" and version "7.33.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.34.0 Search vendor "Haxx" for product "Curl" and version "7.34.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.35.0 Search vendor "Haxx" for product "Curl" and version "7.35.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.36.0 Search vendor "Haxx" for product "Curl" and version "7.36.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.38.0 Search vendor "Haxx" for product "Curl" and version "7.38.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.39.0 Search vendor "Haxx" for product "Curl" and version "7.39.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.40.0 Search vendor "Haxx" for product "Curl" and version "7.40.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.41.0 Search vendor "Haxx" for product "Curl" and version "7.41.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.42.0 Search vendor "Haxx" for product "Curl" and version "7.42.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.42.1 Search vendor "Haxx" for product "Curl" and version "7.42.1"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.43.0 Search vendor "Haxx" for product "Curl" and version "7.43.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.44.0 Search vendor "Haxx" for product "Curl" and version "7.44.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.45.0 Search vendor "Haxx" for product "Curl" and version "7.45.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.46.0 Search vendor "Haxx" for product "Curl" and version "7.46.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.47.0 Search vendor "Haxx" for product "Curl" and version "7.47.0"		-		Affected
Haxx Search vendor "Haxx"		Curl Search vendor "Haxx" for product "Curl"				7.48.0 Search vendor "Haxx" for product "Curl" and version "7.48.0"		-		Affected