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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Red Hat Issues Fix) OpenSSL DTLS Processing Bugs Let Remote Users Deny Service and Execute Arbitrary Code
SecurityTracker Alert ID:  1030729
SecurityTracker URL:  http://securitytracker.com/id/1030729
CVE Reference:   CVE-2014-0221   (Links to External Site)
Date:  Aug 14 2014
Impact:   Denial of service via network, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 0.9.8za, 1.0.0m, 1.0.1h
Description:   Two vulnerabilities were reported in OpenSSL. A remote user can execute arbitrary code on the target system. A remote user can cause denial of service conditions.

A remote user can send specially crafted DTLS fragments to the target DTLS client or server to trigger a buffer overflow and execute arbitrary code on the target system [CVE-2014-0195]. Only applications using OpenSSL as a DTLS client or server are affected.

The vendor was notified on April 23, 2014.

Juri Aedla reported this vulnerability (via HP's ZDI).

A remote server can send a specially crafted DTLS handshake to the target DTLS client to trigger a recursion flaw and cause the target service to crash [CVE-2014-0221]. Only applications using OpenSSL as a DTLS client are affected.

The vendor was notified on May 9, 2014.

Imre Rad (Search-Lab Ltd.) reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.

A remote user can cause the target service to crash.

Solution:   Red Hat has issued a fix for CVE-2014-0221.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2014-1053.html

Vendor URL:  www.openssl.org/news/secadv_20140605.txt (Links to External Site)
Cause:   Boundary error, State error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  5

Message History:   This archive entry is a follow-up to the message listed below.
Jun 5 2014 OpenSSL DTLS Processing Bugs Let Remote Users Deny Service and Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2014:1053-01] Moderate: openssl security update

-----BEGIN PGP SIGNED MESSAGE-----
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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: openssl security update
Advisory ID:       RHSA-2014:1053-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-1053.html
Issue date:        2014-08-13
CVE Names:         CVE-2014-0221 CVE-2014-3505 CVE-2014-3506 
                   CVE-2014-3508 CVE-2014-3510 
=====================================================================

1. Summary:

Updated openssl packages that fix multiple security issues are now
available for Red Hat Enterprise Linux 5.

Red Hat Product Security has rated this update as having Moderate security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64
Red Hat Enterprise Linux Desktop Workstation (v. 5 client) - i386, x86_64

3. Description:

OpenSSL is a toolkit that implements the Secure Sockets Layer (SSL),
Transport Layer Security (TLS), and Datagram Transport Layer Security
(DTLS) protocols, as well as a full-strength, general purpose cryptography
library.

It was discovered that the OBJ_obj2txt() function could fail to properly
NUL-terminate its output. This could possibly cause an application using
OpenSSL functions to format fields of X.509 certificates to disclose
portions of its memory. (CVE-2014-3508)

Multiple flaws were discovered in the way OpenSSL handled DTLS packets.
A remote attacker could use these flaws to cause a DTLS server or client
using OpenSSL to crash or use excessive amounts of memory. (CVE-2014-0221,
CVE-2014-3505, CVE-2014-3506)

A NULL pointer dereference flaw was found in the way OpenSSL performed a
handshake when using the anonymous Diffie-Hellman (DH) key exchange. A
malicious server could cause a DTLS client using OpenSSL to crash if that
client had anonymous DH cipher suites enabled. (CVE-2014-3510)

Red Hat would like to thank the OpenSSL project for reporting
CVE-2014-0221. Upstream acknowledges Imre Rad of Search-Lab as the original
reporter of this issue.

All OpenSSL users are advised to upgrade to these updated packages, which
contain backported patches to correct these issues. For the update to take
effect, all services linked to the OpenSSL library (such as httpd and other
SSL-enabled services) must be restarted or the system rebooted.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the
Red Hat Network to apply this update are available at
https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1103593 - CVE-2014-0221 openssl: DoS when sending invalid DTLS handshake
1127490 - CVE-2014-3508 openssl: information leak in pretty printing functions
1127499 - CVE-2014-3505 openssl: DTLS packet processing double free
1127500 - CVE-2014-3506 openssl: DTLS memory exhaustion
1127503 - CVE-2014-3510 openssl: DTLS anonymous (EC)DH denial of service

6. Package List:

Red Hat Enterprise Linux Desktop (v. 5 client):

Source:
openssl-0.9.8e-27.el5_10.4.src.rpm

i386:
openssl-0.9.8e-27.el5_10.4.i386.rpm
openssl-0.9.8e-27.el5_10.4.i686.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i386.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i686.rpm
openssl-perl-0.9.8e-27.el5_10.4.i386.rpm

x86_64:
openssl-0.9.8e-27.el5_10.4.i686.rpm
openssl-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i686.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-perl-0.9.8e-27.el5_10.4.x86_64.rpm

Red Hat Enterprise Linux Desktop Workstation (v. 5 client):

Source:
openssl-0.9.8e-27.el5_10.4.src.rpm

i386:
openssl-debuginfo-0.9.8e-27.el5_10.4.i386.rpm
openssl-devel-0.9.8e-27.el5_10.4.i386.rpm

x86_64:
openssl-debuginfo-0.9.8e-27.el5_10.4.i386.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-devel-0.9.8e-27.el5_10.4.i386.rpm
openssl-devel-0.9.8e-27.el5_10.4.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
openssl-0.9.8e-27.el5_10.4.src.rpm

i386:
openssl-0.9.8e-27.el5_10.4.i386.rpm
openssl-0.9.8e-27.el5_10.4.i686.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i386.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i686.rpm
openssl-devel-0.9.8e-27.el5_10.4.i386.rpm
openssl-perl-0.9.8e-27.el5_10.4.i386.rpm

ia64:
openssl-0.9.8e-27.el5_10.4.i686.rpm
openssl-0.9.8e-27.el5_10.4.ia64.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i686.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.ia64.rpm
openssl-devel-0.9.8e-27.el5_10.4.ia64.rpm
openssl-perl-0.9.8e-27.el5_10.4.ia64.rpm

ppc:
openssl-0.9.8e-27.el5_10.4.ppc.rpm
openssl-0.9.8e-27.el5_10.4.ppc64.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.ppc.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.ppc64.rpm
openssl-devel-0.9.8e-27.el5_10.4.ppc.rpm
openssl-devel-0.9.8e-27.el5_10.4.ppc64.rpm
openssl-perl-0.9.8e-27.el5_10.4.ppc.rpm

s390x:
openssl-0.9.8e-27.el5_10.4.s390.rpm
openssl-0.9.8e-27.el5_10.4.s390x.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.s390.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.s390x.rpm
openssl-devel-0.9.8e-27.el5_10.4.s390.rpm
openssl-devel-0.9.8e-27.el5_10.4.s390x.rpm
openssl-perl-0.9.8e-27.el5_10.4.s390x.rpm

x86_64:
openssl-0.9.8e-27.el5_10.4.i686.rpm
openssl-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i386.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.i686.rpm
openssl-debuginfo-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-devel-0.9.8e-27.el5_10.4.i386.rpm
openssl-devel-0.9.8e-27.el5_10.4.x86_64.rpm
openssl-perl-0.9.8e-27.el5_10.4.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/#package

7. References:

https://www.redhat.com/security/data/cve/CVE-2014-0221.html
https://www.redhat.com/security/data/cve/CVE-2014-3505.html
https://www.redhat.com/security/data/cve/CVE-2014-3506.html
https://www.redhat.com/security/data/cve/CVE-2014-3508.html
https://www.redhat.com/security/data/cve/CVE-2014-3510.html
https://access.redhat.com/security/updates/classification/#moderate
https://www.openssl.org/news/secadv_20140605.txt
https://www.openssl.org/news/secadv_20140806.txt

8. Contact:

The Red Hat security contact is <secalert@redhat.com>.  More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2014 Red Hat, Inc.
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