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Category:   Application (VPN)  >   OpenSSL Vendors:   OpenSSL.org
(Red Hat Issues Fix) OpenSSL Multiple Bugs Let Remote Users Deny Service and Obtain Potentially Sensitive Information
SecurityTracker Alert ID:  1034412
SecurityTracker URL:  http://securitytracker.com/id/1034412
CVE Reference:   CVE-2015-3195   (Links to External Site)
Date:  Dec 14 2015
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): prior to versions 0.9.8zh, 1.0.0t, 1.0.1q, 1.0.2e
Description:   Multiple vulnerabilities were reported in OpenSSL. A remote user can cause the target service to crash. A remote user can obtain potentially sensitive information on the target system.

A remote server can send a specially crafted ServerKeyExchange for an anonymous DH ciphersuite with the value of p set to 0 to potentially cause the target service to crash [CVE-2015-1794]. Version 1.0.2 is affected.

The vendor was notified on August 3, 2015.

Guy Leaver (Cisco) reported this vulnerability.

A remote user can exploit a carry propagation flaw in BN_mod_exp() to potentially determine information about the private key in certain situations [CVE-2015-3193].

Systems configured for persistent DH parameters and sharing a private key between multiple clients are affected. Version 1.0.2 is affected.

The vendor was notified on August 13, 2015.

Hanno Bock reported this vulnerability.

A remote user can send a certificate with a specially crafted ASN.1 signature that uses the RSA PSS algorithm and does not contain the mast generation function parameter to trigger a null pointer dereference and crash [CVE-2015-3194]. Versions 1.0.1 and 1.0.2 are affected.

The vendor was notified on August 27 2015.

Loic Jonas Etienne (Qnective AG) reported this vulnerability.

A remote user can supply a specially crafted X509_ATTRIBUTE structure to trigger a memory leak and potentially disclose sensitive information [CVE-2015-3195]. Applications that read PKCS#7 or CMS data from untrusted sources are affected. SSL/TLS is not affected.

The vendor was notified on November 9, 2015.

Adam Langley (Google/BoringSSL) reported this vulnerability.

A remote user can send send PSK identity hints to a multi-threaded client to trigger a race condition and then a double free memory error and cause the target service to crash [CVE-2015-3196]. Versions 1.0.0, 1.0.1 (prior to 1.0.1p), and 1.0.2 (prior to 1.0.2d) are affected.

Impact:   A remote user can cause the target service to crash.

A remote user can obtain potentially sensitive information on the target system.

Solution:   Red Hat has issued a fix for CVE-2015-3195.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2015-2616.html

Vendor URL:  rhn.redhat.com/errata/RHSA-2015-2616.html (Links to External Site)
Cause:   Access control 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.
Dec 5 2015 OpenSSL Multiple Bugs Let Remote Users Deny Service and Obtain Potentially Sensitive Information



 Source Message Contents

Subject:  [RHSA-2015:2616-01] Moderate: openssl security update

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

=====================================================================
                   Red Hat Security Advisory

Synopsis:          Moderate: openssl security update
Advisory ID:       RHSA-2015:2616-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-2616.html
Issue date:        2015-12-14
CVE Names:         CVE-2015-3195 
=====================================================================

1. Summary:

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

Red Hat Product Security has rated this update as having Moderate security
impact. A Common Vulnerability Scoring System (CVSS) base score, which
gives a detailed severity rating, is available from the CVE link 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 v2/v3)
and Transport Layer Security (TLS v1) protocols, as well as a
full-strength, general purpose cryptography library.

A memory leak vulnerability was found in the way OpenSSL parsed PKCS#7 and
CMS data. A remote attacker could use this flaw to cause an application
that parses PKCS#7 or CMS data from untrusted sources to use an excessive
amount of memory and possibly crash. (CVE-2015-3195)

All openssl users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. For the update to take
effect, all services linked to the OpenSSL library 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.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1288322 - CVE-2015-3195 OpenSSL: X509_ATTRIBUTE memory leak

6. Package List:

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

Source:
openssl-0.9.8e-37.el5_11.src.rpm

i386:
openssl-0.9.8e-37.el5_11.i386.rpm
openssl-0.9.8e-37.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i686.rpm
openssl-perl-0.9.8e-37.el5_11.i386.rpm

x86_64:
openssl-0.9.8e-37.el5_11.i686.rpm
openssl-0.9.8e-37.el5_11.x86_64.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-37.el5_11.x86_64.rpm
openssl-perl-0.9.8e-37.el5_11.x86_64.rpm

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

Source:
openssl-0.9.8e-37.el5_11.src.rpm

i386:
openssl-debuginfo-0.9.8e-37.el5_11.i386.rpm
openssl-devel-0.9.8e-37.el5_11.i386.rpm

x86_64:
openssl-debuginfo-0.9.8e-37.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-37.el5_11.x86_64.rpm
openssl-devel-0.9.8e-37.el5_11.i386.rpm
openssl-devel-0.9.8e-37.el5_11.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
openssl-0.9.8e-37.el5_11.src.rpm

i386:
openssl-0.9.8e-37.el5_11.i386.rpm
openssl-0.9.8e-37.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i686.rpm
openssl-devel-0.9.8e-37.el5_11.i386.rpm
openssl-perl-0.9.8e-37.el5_11.i386.rpm

ia64:
openssl-0.9.8e-37.el5_11.i686.rpm
openssl-0.9.8e-37.el5_11.ia64.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-37.el5_11.ia64.rpm
openssl-devel-0.9.8e-37.el5_11.ia64.rpm
openssl-perl-0.9.8e-37.el5_11.ia64.rpm

ppc:
openssl-0.9.8e-37.el5_11.ppc.rpm
openssl-0.9.8e-37.el5_11.ppc64.rpm
openssl-debuginfo-0.9.8e-37.el5_11.ppc.rpm
openssl-debuginfo-0.9.8e-37.el5_11.ppc64.rpm
openssl-devel-0.9.8e-37.el5_11.ppc.rpm
openssl-devel-0.9.8e-37.el5_11.ppc64.rpm
openssl-perl-0.9.8e-37.el5_11.ppc.rpm

s390x:
openssl-0.9.8e-37.el5_11.s390.rpm
openssl-0.9.8e-37.el5_11.s390x.rpm
openssl-debuginfo-0.9.8e-37.el5_11.s390.rpm
openssl-debuginfo-0.9.8e-37.el5_11.s390x.rpm
openssl-devel-0.9.8e-37.el5_11.s390.rpm
openssl-devel-0.9.8e-37.el5_11.s390x.rpm
openssl-perl-0.9.8e-37.el5_11.s390x.rpm

x86_64:
openssl-0.9.8e-37.el5_11.i686.rpm
openssl-0.9.8e-37.el5_11.x86_64.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i386.rpm
openssl-debuginfo-0.9.8e-37.el5_11.i686.rpm
openssl-debuginfo-0.9.8e-37.el5_11.x86_64.rpm
openssl-devel-0.9.8e-37.el5_11.i386.rpm
openssl-devel-0.9.8e-37.el5_11.x86_64.rpm
openssl-perl-0.9.8e-37.el5_11.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/

7. References:

https://access.redhat.com/security/cve/CVE-2015-3195
https://access.redhat.com/security/updates/classification/#moderate
https://openssl.org/news/secadv/20151203.txt

8. Contact:

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

Copyright 2015 Red Hat, Inc.
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