CVE-2016-3739

MEDIUM

cURL <7.49.0 - Man-in-the-Middle

Title source: llm

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.

References (11)

[Vendor Advisory] http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html

[Third Party Advisory, VDB Entry] http://www.securityfocus.com/bid/90726

[Third Party Advisory, VDB Entry] http://www.securitytracker.com/id/1035907

[Vendor Advisory] http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349

[Vendor Advisory] https://curl.haxx.se/CVE-2016-3739.patch

[Various Sources] https://curl.haxx.se/changes.html#7_49_0

[Vendor Advisory] https://curl.haxx.se/docs/adv_20160518.html

[Vendor Advisory] https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149

[Vendor Advisory] https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722

[Third Party Advisory] https://security.gentoo.org/glsa/201701-47

[Mailing List] http://www.openwall.com/lists/oss-security/2024/03/27/4

Scores

CVSS v3 5.3

EPSS 0.0107

EPSS Percentile 77.5%

Attack Vector NETWORK

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

Classification

CWE

CWE-20

Status draft

Affected Products (37)

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

haxx/curl

... and 22 more

Timeline

Published May 20, 2016

Tracked Since Feb 18, 2026