#VU41413 Input validation error in OpenSSL
Vulnerability identifier: #VU41413
Vulnerability risk: Medium
CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N/E:U/RL:O/RC:C]
CVE-ID:
CWE-ID:
CWE-20
Exploitation vector: Network
Exploit availability: No
Vulnerable software:
OpenSSL
Server applications /
Encryption software
Vendor: OpenSSL Software Foundation
Description
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The ssl23_get_client_hello function in s23_srvr.c in OpenSSL 1.0.1 before 1.0.1i allows man-in-the-middle attackers to force the use of TLS 1.0 by triggering ClientHello message fragmentation in communication between a client and server that both support later TLS versions, related to a "protocol downgrade" issue.
Mitigation
Install update from vendor's website.
Vulnerable software versions
OpenSSL: 1.0.0 - 1.0.0m, 1.0.1 - 1.0.1h
External links
http:ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2014-008.txt.asc
http://aix.software.ibm.com/aix/efixes/security/openssl_advisory10.asc
http://linux.oracle.com/errata/ELSA-2014-1052.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136470.html
http://lists.fedoraproject.org/pipermail/package-announce/2014-August/136473.html
http://lists.opensuse.org/opensuse-updates/2014-08/msg00036.html
http://marc.info/?l=bugtraq&m=142350350616251&w=2
http://marc.info/?l=bugtraq&m=142495837901899&w=2
http://marc.info/?l=bugtraq&m=142624590206005&w=2
http://marc.info/?l=bugtraq&m=142660345230545&w=2
http://marc.info/?l=bugtraq&m=142791032306609&w=2
http://marc.info/?l=bugtraq&m=143290437727362&w=2
http://marc.info/?l=bugtraq&m=143290522027658&w=2
http://rhn.redhat.com/errata/RHSA-2015-0126.html
http://rhn.redhat.com/errata/RHSA-2015-0197.html
http://secunia.com/advisories/58962
http://secunia.com/advisories/59700
http://secunia.com/advisories/59710
http://secunia.com/advisories/59756
http://secunia.com/advisories/59887
http://secunia.com/advisories/60022
http://secunia.com/advisories/60221
http://secunia.com/advisories/60377
http://secunia.com/advisories/60493
http://secunia.com/advisories/60684
http://secunia.com/advisories/60803
http://secunia.com/advisories/60810
http://secunia.com/advisories/60890
http://secunia.com/advisories/60917
http://secunia.com/advisories/60921
http://secunia.com/advisories/60938
http://secunia.com/advisories/61017
http://secunia.com/advisories/61043
http://secunia.com/advisories/61100
http://secunia.com/advisories/61139
http://secunia.com/advisories/61184
http://secunia.com/advisories/61775
http://secunia.com/advisories/61959
http://security.gentoo.org/glsa/glsa-201412-39.xml
http://support.f5.com/kb/en-us/solutions/public/15000/500/sol15564.html
http://www.arubanetworks.com/support/alerts/aid-08182014.txt
http://www.debian.org/security/2014/dsa-2998
http://www.huawei.com/en/security/psirt/security-bulletins/security-advisories/hw-372998.htm
http://www.securityfocus.com/bid/69079
http://www.securitytracker.com/id/1030693
http://www.splunk.com/view/SP-CAAANHS
http://www.tenable.com/security/tns-2014-06
http://www-01.ibm.com/support/docview.wss?uid=nas8N1020240
http://www-01.ibm.com/support/docview.wss?uid=swg21682293
http://www-01.ibm.com/support/docview.wss?uid=swg21683389
http://www-01.ibm.com/support/docview.wss?uid=swg21686997
http://bugzilla.redhat.com/show_bug.cgi?id=1127504
http://exchange.xforce.ibmcloud.com/vulnerabilities/95162
http://git.openssl.org/gitweb/?p=openssl.git;a=commit;h=280b1f1ad12131defcd986676a8fc9717aaa601b
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05150888
http://h20566.www2.hpe.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c05158380
http://kc.mcafee.com/corporate/index?page=content&id=SB10084
http://lists.balabit.hu/pipermail/syslog-ng-announce/2014-September/000196.html
http://support.citrix.com/article/CTX216642
http://techzone.ergon.ch/CVE-2014-3511
http://www.freebsd.org/security/advisories/FreeBSD-SA-14:18.openssl.asc
http://www.openssl.org/news/secadv_20140806.txt
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
