Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2013.0491
Moderate: stunnel security update
9 April 2013
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: stunnel
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
UNIX variants (UNIX, Linux, OSX)
Windows
Impact/Access: Execute Arbitrary Code/Commands -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2013-1762
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2013-0714.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running stunnel check for an updated version of the software for
their operating system.
- --------------------------BEGIN INCLUDED TEXT--------------------
- -----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
=====================================================================
Red Hat Security Advisory
Synopsis: Moderate: stunnel security update
Advisory ID: RHSA-2013:0714-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2013-0714.html
Issue date: 2013-04-08
CVE Names: CVE-2013-1762
=====================================================================
1. Summary:
An updated stunnel package that fixes one security issue is now available
for Red Hat Enterprise Linux 6.
The Red Hat Security Response Team 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 Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
Red Hat Enterprise Linux Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
3. Description:
stunnel is a socket wrapper which can provide SSL (Secure Sockets Layer)
support to ordinary applications. For example, it can be used in
conjunction with imapd to create an SSL-secure IMAP server.
An integer conversion issue was found in stunnel when using Microsoft NT
LAN Manager (NTLM) authentication with the HTTP CONNECT tunneling method.
With this configuration, and using stunnel in SSL client mode on a 64-bit
system, an attacker could possibly execute arbitrary code with the
privileges of the stunnel process via a man-in-the-middle attack or by
tricking a user into using a malicious proxy. (CVE-2013-1762)
All stunnel users should upgrade to this updated package, which contains a
backported patch to correct this issue.
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/knowledge/articles/11258
5. Bugs fixed (http://bugzilla.redhat.com/):
917839 - CVE-2013-1762 Stunnel: buffer overflow vulnerability due to incorrect integer conversion in the NTLM authentication of the CONNECT protocol negotiation
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Client/en/os/SRPMS/stunnel-4.29-3.el6_4.src.rpm
i386:
stunnel-4.29-3.el6_4.i686.rpm
stunnel-debuginfo-4.29-3.el6_4.i686.rpm
x86_64:
stunnel-4.29-3.el6_4.x86_64.rpm
stunnel-debuginfo-4.29-3.el6_4.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6ComputeNode/en/os/SRPMS/stunnel-4.29-3.el6_4.src.rpm
x86_64:
stunnel-4.29-3.el6_4.x86_64.rpm
stunnel-debuginfo-4.29-3.el6_4.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/stunnel-4.29-3.el6_4.src.rpm
i386:
stunnel-4.29-3.el6_4.i686.rpm
stunnel-debuginfo-4.29-3.el6_4.i686.rpm
ppc64:
stunnel-4.29-3.el6_4.ppc64.rpm
stunnel-debuginfo-4.29-3.el6_4.ppc64.rpm
s390x:
stunnel-4.29-3.el6_4.s390x.rpm
stunnel-debuginfo-4.29-3.el6_4.s390x.rpm
x86_64:
stunnel-4.29-3.el6_4.x86_64.rpm
stunnel-debuginfo-4.29-3.el6_4.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/stunnel-4.29-3.el6_4.src.rpm
i386:
stunnel-4.29-3.el6_4.i686.rpm
stunnel-debuginfo-4.29-3.el6_4.i686.rpm
x86_64:
stunnel-4.29-3.el6_4.x86_64.rpm
stunnel-debuginfo-4.29-3.el6_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-2013-1762.html
https://access.redhat.com/security/updates/classification/#moderate
https://www.stunnel.org/CVE-2013-1762.html
8. Contact:
The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2013 Red Hat, Inc.
- -----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)
iD8DBQFRYwOcXlSAg2UNWIIRAljyAJ0cN7MlW6RDjyc6QOIVUar0diE9WgCgpIvF
7jls+yQ867GtlMPYsnYEhhk=
=xxui
- -----END PGP SIGNATURE-----
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
http://www.auscert.org.au/render.html?cid=1980
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
iQIVAwUBUWNZaO4yVqjM2NGpAQLdHRAAtxTEp12BcsxOZuVNAlgi1sCVfbYJxfjb
TD50vbPE1ccqR8tjKVh8lmd/ZN3LM57SqwwtmUxJ24OPb9Q7zesRSZtep5sntgz2
j+nI76SWbG1dD9C3bUm6eMZDYkl3/kHn2nwdk4da6sT1XU8inEhL+8in4jBMu/xI
CVceDWEJZN2SW3OnEhM4sUYtz9UV1mYpb7uhisoPvxaCv5Yvt22PqLCHrQBZY6IT
gb2D5S3H7wEEQigPQ3DN68Oq3GQgMwori+DE0da3l8IrAehzl7YI17NcEmbdVkV6
vJbFBfwN9VXQ++oWQX1HZwID44tpmJAUNjOG+MiGTN0WJwCqjvcPwnLGCyEEcyu7
9LbPfJJD1ZNn0jhP//fVV2WlRuVVMQset2oMKROFzfh7rOjjQqER9CzOCrCHYr8L
ojl29NBrKdiB4B/kco0pGgaoGm0m685iVceRtxPw5PlOEnJr1rKD3ylM45K0yWq/
rlOQ8JM42kvECBMzn0QIgePtUTqpDbDRMV17rXwt0NNoeyCwPIl9k7lTZztag83z
n1ltOh5baAssoXLOsPorj6YHu5Rq34fBGA4Fy/Ck4nAGRj/EHJgoYHDKXJ9LlX3d
w2vRjsNGRbkQS7UJO/t/7MKwSh/f+arJcdlx2YNI5wwvc2zswyXBsC4jnXmgMXbZ
ZoaSO2FehYE=
=l8r0
-----END PGP SIGNATURE-----