CVE-2016-3739

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.

Category

5.3
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.08% Top 25%
Vendor Advisory slackware.com Vendor Advisory gentoo.org Vendor Advisory haxx.se Vendor Advisory haxx.se
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05320149
http://www.securitytracker.com/id/1035907 vdb entry
https://curl.haxx.se/docs/adv_20160518.html vendor advisory
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2016&m=slackware-security.495349 vendor advisory
http://www.securityfocus.com/bid/90726 vdb entry
https://curl.haxx.se/CVE-2016-3739.patch vendor advisory
https://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05390722
http://www.oracle.com/technetwork/security-advisory/cpuoct2018-4428296.html
https://security.gentoo.org/glsa/201701-47 vendor advisory
https://curl.haxx.se/changes.html#7_49_0
http://www.openwall.com/lists/oss-security/2024/03/27/4 mailing list

Frequently Asked Questions

What is the severity of CVE-2016-3739?
CVE-2016-3739 has been scored as a medium severity vulnerability.
How to fix CVE-2016-3739?
To fix CVE-2016-3739, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2016-3739 being actively exploited in the wild?
It is possible that CVE-2016-3739 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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