#VU33070 Input validation error in cURL - CVE-2016-3739
Published: May 20, 2016 / Updated: August 3, 2020
Vulnerability identifier: #VU33070
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2016-3739
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
cURL
cURL
Software vendor:
curl.haxx.se
curl.haxx.se
Description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
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.
Remediation
Install update from vendor's website.
External links
- http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
- http://www.securityfocus.com/bid/90726
- http://www.securitytracker.com/id/1035907
- http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349
- https://curl.haxx.se/changes.html#7_49_0
- https://curl.haxx.se/CVE-2016-3739.patch
- https://curl.haxx.se/docs/adv_20160518.html
- 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
- https://security.gentoo.org/glsa/201701-47