Bug 982778 – VUL-0: CVE-2016-3739: curl: TLS certificate name check bypass with mbedTLS and PolarSSL

Bug 982778 - (CVE-2016-3739) VUL-0: CVE-2016-3739: curl: TLS certificate name check bypass with mbedTLS and PolarSSL

(CVE-2016-3739)
Summary:	VUL-0: CVE-2016-3739: curl: TLS certificate name check bypass with mbedTLS an...

Status:	RESOLVED UPSTREAM

Classification:	Novell Products
Product:	SUSE Security Incidents
Classification:	Novell Products
Component:	Incidents
Version:	unspecified
Hardware:	Other Other

Priority:	P5 - None Severity: Normal
Target Milestone:	---
Assigned To:	Security Team bot
QA Contact:	Security Team bot

URL:	https://smash.suse.de/issue/169178/
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Reported:	2016-06-02 13:54 UTC by Marcus Meissner
Modified:	2019-05-13 14:44 UTC (History)
CC List:	1 user (show)

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Found By:	Security Response Team
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Description Marcus Meissner 2016-06-02 13:54:19 UTC

rh#1335430

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:
https://bugzilla.redhat.com/show_bug.cgi?id=1335430
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2016-3739
http://seclists.org/oss-sec/2016/q2/362
http://people.canonical.com/~ubuntu-security/cve/2016/CVE-2016-3739.html
http://www.cvedetails.com/cve/CVE-2016-3739/
https://curl.haxx.se/CVE-2016-3739.patch
https://curl.haxx.se/docs/adv_20160518.html
https://curl.haxx.se/changes.html#7_49_0
http://www.securitytracker.com/id/1035907

Comment 1 Marcus Meissner 2016-06-02 13:54:48 UTC

This issue only affects curl when polarssl or embedtls is in use.

We use openssl everywhere, so SUSE is not affected by this problem.