Vulnerability Details : CVE-2016-3739
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.
Vulnerability category: Input validation
Exploit prediction scoring system (EPSS) score for CVE-2016-3739
Probability of exploitation activity in the next 30 days: 0.75%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 79 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2016-3739
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
2.6
|
LOW | AV:N/AC:H/Au:N/C:N/I:P/A:N |
4.9
|
2.9
|
NIST |
|
5.3
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
1.6
|
3.6
|
NIST |
CWE ids for CVE-2016-3739
-
The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.Assigned by: nvd@nist.gov (Primary)
References for CVE-2016-3739
-
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
HPSBMU03691 rev.1 - HPE Insight Control, Multiple Remote Vulnerabilities
-
http://www.securityfocus.com/bid/90726
cURL/libcURL CVE-2016-3739 TLS Certificate Validation Security Bypass Vulnerability
-
https://security.gentoo.org/glsa/201701-47
cURL: Multiple vulnerabilities (GLSA 201701-47) — Gentoo security
-
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349
The Slackware Linux Project: Slackware Security Advisories
-
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
CPU Oct 2018
-
https://curl.haxx.se/docs/adv_20160518.html
curl - TLS certificate check bypass with mbedTLS/PolarSSL - CVE-2016-3739Vendor Advisory
-
http://www.securitytracker.com/id/1035907
cURL mbedTLS/PolarSSL Function Usage Error Lets Remote Users Bypass Certificate Validation - SecurityTracker
-
https://curl.haxx.se/CVE-2016-3739.patch
Vendor Advisory
-
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
HPSBMU03653 rev.1 - HPE System Management Homepage (SMH), Remote Arbitrary Code Execution, Cross-Site Scripting (XSS), Denial of Service (DoS), Unauthorized Disclosure of Information
-
https://curl.haxx.se/changes.html#7_49_0
curl - Changes
Products affected by CVE-2016-3739
- cpe:2.3:a:haxx:curl:7.26.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.28.1:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.27.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.28.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.6:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.7:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.22.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.23.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.29.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.30.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.4:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.5:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.23.1:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.24.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.2:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.3:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.25.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.21.1:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.32.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.31.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.35.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.33.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.34.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.36.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.38.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.41.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.39.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.40.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.42.1:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.42.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.48.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.47.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.43.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.46.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.45.0:*:*:*:*:*:*:*
- cpe:2.3:a:haxx:curl:7.44.0:*:*:*:*:*:*:*