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CVE-2016-3739

Quick assessment

Affected

n/a n/a

Exploitation

High exploitation probability; assess promptly

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Haxx curl和libcurl都是瑞典Haxx公司的产品。curl是一套利用URL语法在命令行下工作的文件传输工具。libcurl是一个免费、开源的客户端URL传输库。 Haxx cURL和libcurl 7.49.0之前版本的lib/vtls/polarssl.c文件中的‘polarssl_connect_step1’函数和lib/vtls/mbedtls.c文件中的‘mbed_connect_step1’函数存在安全漏洞。当程序使用数字IP地址指定主机或使用SSLv3时，远程攻击者可借助任意有效的

AI Predicted 7.5 Difficulty: Easy EPSS 6.93% · P94 Updated Feb 21, 2026

Possible ATT&CK Techniques 1 AI

T1557 · Adversary-in-the-Middle

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I. Basic Information for CVE-2016-3739

Vulnerability Information

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Vulnerability Title

N/A

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

N/A

Source: CVE Program / CVE List V5

Vulnerability Type

N/A

Source: CVE Program / CVE List V5

Vulnerability Title

Haxx cURL和libcurl 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
-	n/a	n/a	-

II. Public POCs for CVE-2016-3739

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2016-3739

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Vendor Advisories for CVE-2016-3739 (4)

http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html x_refsource_CONFIRM
http://www.securityfocus.com/bid/90726 vdb-entry x_refsource_BID
http://www.securitytracker.com/id/1035907 vdb-entry x_refsource_SECTRACK
https://security.gentoo.org/glsa/201701-47 vendor-advisory x_refsource_GENTOO

Other References for CVE-2016-3739 (5)

https://curl.haxx.se/docs/adv_20160518.html x_refsource_CONFIRM
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149 x_refsource_CONFIRM
https://curl.haxx.se/CVE-2016-3739.patch x_refsource_CONFIRM
https://curl.haxx.se/changes.html#7_49_0 x_refsource_CONFIRM
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722 x_refsource_CONFIRM

https://www.cve.org/CVERecord?id=CVE-2016-3739

Same Patch Batch · n/a · 2016-05-20 · 84 CVEs total

CVE-2016-1832		Apple iOS、watchOS、OS X El Capitan和tvOS libc 缓冲区溢出漏洞
CVE-2016-1842		Apple iOS、watchOS和OS X El Capitan MapKit 信息泄露漏洞
CVE-2016-1829		Apple iOS、watchOS、OS X El Capitan和tvOS kernel 缓冲区溢出漏洞
CVE-2016-1830		Apple iOS、watchOS、OS X El Capitan和tvOS kernel 缓冲区溢出漏洞
CVE-2016-1828		Apple iOS、watchOS、OS X El Capitan和tvOS kernel 缓冲区溢出漏洞
CVE-2016-1825		Apple OS X El Capitan IOHIDFamily 缓冲区溢出漏洞
CVE-2016-1824		Apple iOS、watchOS、OS X El Capitan和tvOS IOHIDFamily 缓冲区溢出漏洞
CVE-2016-1823		Apple iOS、watchOS、OS X El Capitan和tvOS IOHIDFamily 缓冲区溢出漏洞
CVE-2016-1822		Apple OS X El Capitan IOFireWireFamily 缓冲区溢出漏洞
CVE-2016-1826		Apple OS X El Capitan kernel 任意代码执行漏洞
CVE-2016-1831		Apple iOS和OS X El Capitan kernel 缓冲区溢出漏洞
CVE-2016-1833		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1834		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1835		Apple iOS和OS X El Capitan libxml2 缓冲区错误漏洞
CVE-2016-1836		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1837		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1838		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1839		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1840		Apple iOS、watchOS、OS X El Capitan和tvOS libxml2 缓冲区错误漏洞
CVE-2016-1841		Apple iOS、watchOS、OS X El Capitan和tvOS libxslt 缓冲区溢出漏洞

Showing top 20 of 84 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: n/a

Same vendor: n/a

V. Comments for CVE-2016-3739

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Goal Reached Thanks to every supporter — we hit 100%!

CVE-2016-3739

Quick assessment

Possible ATT&CK Techniques 1 AI

I. Basic Information for CVE-2016-3739

Vulnerability Information

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Vulnerability Title

Vulnerability Description

CVSS Information

Vulnerability Type

Affected Products

II. Public POCs for CVE-2016-3739

III. Intelligence Information for CVE-2016-3739

Vendor Advisories for CVE-2016-3739 (4)

Other References for CVE-2016-3739 (5)

Same Patch Batch · n/a · 2016-05-20 · 84 CVEs total

IV. Related Vulnerabilities

V. Comments for CVE-2016-3739

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