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[RHSA-2013:0714-01] Moderate: stunnel security update

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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 . More contact

details at https://access.redhat.com/security/team/contact/

 

Copyright 2013 Red Hat, Inc.

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