CVE-2016-3739

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2016-3739
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-05-20 14:59:05 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionThe (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.

Risk And Classification

Primary CVSS: v3.0 5.3 MEDIUM from [email protected]

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Problem Types: CWE-20 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary5.3MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
2.0[email protected]Primary2.6AV:N/AC:H/Au:N/C:N/I:P/A:N

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
None

CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
High
Authentication
None
Confidentiality
None
Integrity
Partial
Availability
None

AV:N/AC:H/Au:N/C:N/I:P/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Haxx Curl 7.21.0 All All All
Application Haxx Curl 7.21.1 All All All
Application Haxx Curl 7.21.2 All All All
Application Haxx Curl 7.21.3 All All All
Application Haxx Curl 7.21.4 All All All
Application Haxx Curl 7.21.5 All All All
Application Haxx Curl 7.21.6 All All All
Application Haxx Curl 7.21.7 All All All
Application Haxx Curl 7.22.0 All All All
Application Haxx Curl 7.23.0 All All All
Application Haxx Curl 7.23.1 All All All
Application Haxx Curl 7.24.0 All All All
Application Haxx Curl 7.25.0 All All All
Application Haxx Curl 7.26.0 All All All
Application Haxx Curl 7.27.0 All All All
Application Haxx Curl 7.28.0 All All All
Application Haxx Curl 7.28.1 All All All
Application Haxx Curl 7.29.0 All All All
Application Haxx Curl 7.30.0 All All All
Application Haxx Curl 7.31.0 All All All
Application Haxx Curl 7.32.0 All All All
Application Haxx Curl 7.33.0 All All All
Application Haxx Curl 7.34.0 All All All
Application Haxx Curl 7.35.0 All All All
Application Haxx Curl 7.36.0 All All All
Application Haxx Curl 7.38.0 All All All
Application Haxx Curl 7.39.0 All All All
Application Haxx Curl 7.40.0 All All All
Application Haxx Curl 7.41.0 All All All
Application Haxx Curl 7.42.0 All All All
Application Haxx Curl 7.42.1 All All All
Application Haxx Curl 7.43.0 All All All
Application Haxx Curl 7.44.0 All All All
Application Haxx Curl 7.45.0 All All All
Application Haxx Curl 7.46.0 All All All
Application Haxx Curl 7.47.0 All All All
Application Haxx Curl 7.48.0 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
curl - Changes af854a3a-2127-422b-91ae-364da2661108 curl.haxx.se
CPU Oct 2018 af854a3a-2127-422b-91ae-364da2661108 www.oracle.com
The Slackware Linux Project: Slackware Security Advisories af854a3a-2127-422b-91ae-364da2661108 www.slackware.com
www.openwall.com/lists/oss-security/2024/03/27/4 af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
cURL mbedTLS/PolarSSL Function Usage Error Lets Remote Users Bypass Certificate Validation - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
curl.haxx.se/CVE-2016-3739.patch af854a3a-2127-422b-91ae-364da2661108 curl.haxx.se Vendor Advisory
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com
cURL/libcURL CVE-2016-3739 TLS Certificate Validation Security Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Document Display | HPE Support Center af854a3a-2127-422b-91ae-364da2661108 h20566.www2.hpe.com
curl - TLS certificate check bypass with mbedTLS/PolarSSL af854a3a-2127-422b-91ae-364da2661108 curl.haxx.se Vendor Advisory
cURL: Multiple vulnerabilities (GLSA 201701-47) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 710385 Gentoo Linux cURL Multiple Vulnerabilities (GLSA 201701-47)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report