RHEL 6 : stunnel (RHSA-2013:0714)

This script is Copyright (C) 2013-2014 Tenable Network Security, Inc.


Synopsis :

The remote Red Hat host is missing one or more security updates.

Description :

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.

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.

See also :

https://www.redhat.com/security/data/cve/CVE-2013-1762.html
https://www.stunnel.org/CVE-2013-1762.html
http://rhn.redhat.com/errata/RHSA-2013-0714.html

Solution :

Update the affected stunnel and / or stunnel-debuginfo packages.

Risk factor :

Medium / CVSS Base Score : 6.6
(CVSS2#AV:N/AC:H/Au:N/C:P/I:P/A:C)
CVSS Temporal Score : 5.7
(CVSS2#E:ND/RL:OF/RC:C)
Public Exploit Available : true

Family: Red Hat Local Security Checks

Nessus Plugin ID: 65863 ()

Bugtraq ID: 58277

CVE ID: CVE-2013-1762