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Category:   Application (Security)  >   FreeRADIUS Vendors:   FreeRADIUS Server Project
(Red Hat Issues Fix) FreeRADIUS Client Certificate Stack Overflow Lets Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1027600
SecurityTracker URL:  http://securitytracker.com/id/1027600
CVE Reference:   CVE-2012-3547   (Links to External Site)
Date:  Oct 2 2012
Impact:   Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  
Version(s): 2.1.10 - 2.1.12
Description:   A vulnerability was reported in FreeRADIUS. A remote user can execute arbitrary code on the target system.

A remote user can send a specially crafted client certificate to trigger a stack overflow in cbtls_verify() and execute arbitrary code on the target system. The code will run with the privileges of the target service.

Systems using TLS-based EAP methods (including EAP-TLS, EAP-TTLS, and PEAP) are affected.

The vendor was notified on August 29, 2012.

Timo Warns of PRESENSE Technologies reported this vulnerability.

Impact:   A remote user can execute arbitrary code on the target system.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-1326.html

Vendor URL:  freeradius.org/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6

Message History:   This archive entry is a follow-up to the message listed below.
Sep 10 2012 FreeRADIUS Client Certificate Stack Overflow Lets Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2012:1326-01] Moderate: freeradius security update

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

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

Synopsis:          Moderate: freeradius security update
Advisory ID:       RHSA-2012:1326-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1326.html
Issue date:        2012-10-02
CVE Names:         CVE-2012-3547 
=====================================================================

1. Summary:

Updated freeradius packages that fix one security issue are 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 Server (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 6) - i386, ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation Optional (v. 6) - i386, x86_64

3. Description:

FreeRADIUS is a high-performance and highly configurable free Remote
Authentication Dial In User Service (RADIUS) server, designed to allow
centralized authentication and authorization for a network.

A buffer overflow flaw was discovered in the way radiusd handled the
expiration date field in X.509 client certificates. A remote attacker could
possibly use this flaw to crash radiusd if it were configured to use the
certificate or TLS tunnelled authentication methods (such as EAP-TLS,
EAP-TTLS, and PEAP). (CVE-2012-3547)

Red Hat would like to thank Timo Warns of PRESENSE Technologies GmbH for
reporting this issue.

Users of FreeRADIUS are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. After installing the
update, radiusd will be restarted automatically.

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/):

852752 - CVE-2012-3547 freeradius: stack-based buffer overflow via long expiration date fields in client X509 certificates

6. Package List:

Red Hat Enterprise Linux Server (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/freeradius-2.1.12-4.el6_3.src.rpm

i386:
freeradius-2.1.12-4.el6_3.i686.rpm
freeradius-debuginfo-2.1.12-4.el6_3.i686.rpm

ppc64:
freeradius-2.1.12-4.el6_3.ppc64.rpm
freeradius-debuginfo-2.1.12-4.el6_3.ppc64.rpm

s390x:
freeradius-2.1.12-4.el6_3.s390x.rpm
freeradius-debuginfo-2.1.12-4.el6_3.s390x.rpm

x86_64:
freeradius-2.1.12-4.el6_3.x86_64.rpm
freeradius-debuginfo-2.1.12-4.el6_3.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Server/en/os/SRPMS/freeradius-2.1.12-4.el6_3.src.rpm

i386:
freeradius-debuginfo-2.1.12-4.el6_3.i686.rpm
freeradius-krb5-2.1.12-4.el6_3.i686.rpm
freeradius-ldap-2.1.12-4.el6_3.i686.rpm
freeradius-mysql-2.1.12-4.el6_3.i686.rpm
freeradius-perl-2.1.12-4.el6_3.i686.rpm
freeradius-postgresql-2.1.12-4.el6_3.i686.rpm
freeradius-python-2.1.12-4.el6_3.i686.rpm
freeradius-unixODBC-2.1.12-4.el6_3.i686.rpm
freeradius-utils-2.1.12-4.el6_3.i686.rpm

ppc64:
freeradius-debuginfo-2.1.12-4.el6_3.ppc64.rpm
freeradius-krb5-2.1.12-4.el6_3.ppc64.rpm
freeradius-ldap-2.1.12-4.el6_3.ppc64.rpm
freeradius-mysql-2.1.12-4.el6_3.ppc64.rpm
freeradius-perl-2.1.12-4.el6_3.ppc64.rpm
freeradius-postgresql-2.1.12-4.el6_3.ppc64.rpm
freeradius-python-2.1.12-4.el6_3.ppc64.rpm
freeradius-unixODBC-2.1.12-4.el6_3.ppc64.rpm
freeradius-utils-2.1.12-4.el6_3.ppc64.rpm

s390x:
freeradius-debuginfo-2.1.12-4.el6_3.s390x.rpm
freeradius-krb5-2.1.12-4.el6_3.s390x.rpm
freeradius-ldap-2.1.12-4.el6_3.s390x.rpm
freeradius-mysql-2.1.12-4.el6_3.s390x.rpm
freeradius-perl-2.1.12-4.el6_3.s390x.rpm
freeradius-postgresql-2.1.12-4.el6_3.s390x.rpm
freeradius-python-2.1.12-4.el6_3.s390x.rpm
freeradius-unixODBC-2.1.12-4.el6_3.s390x.rpm
freeradius-utils-2.1.12-4.el6_3.s390x.rpm

x86_64:
freeradius-debuginfo-2.1.12-4.el6_3.x86_64.rpm
freeradius-krb5-2.1.12-4.el6_3.x86_64.rpm
freeradius-ldap-2.1.12-4.el6_3.x86_64.rpm
freeradius-mysql-2.1.12-4.el6_3.x86_64.rpm
freeradius-perl-2.1.12-4.el6_3.x86_64.rpm
freeradius-postgresql-2.1.12-4.el6_3.x86_64.rpm
freeradius-python-2.1.12-4.el6_3.x86_64.rpm
freeradius-unixODBC-2.1.12-4.el6_3.x86_64.rpm
freeradius-utils-2.1.12-4.el6_3.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/freeradius-2.1.12-4.el6_3.src.rpm

i386:
freeradius-2.1.12-4.el6_3.i686.rpm
freeradius-debuginfo-2.1.12-4.el6_3.i686.rpm

x86_64:
freeradius-2.1.12-4.el6_3.x86_64.rpm
freeradius-debuginfo-2.1.12-4.el6_3.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 6):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/6Workstation/en/os/SRPMS/freeradius-2.1.12-4.el6_3.src.rpm

i386:
freeradius-debuginfo-2.1.12-4.el6_3.i686.rpm
freeradius-krb5-2.1.12-4.el6_3.i686.rpm
freeradius-ldap-2.1.12-4.el6_3.i686.rpm
freeradius-mysql-2.1.12-4.el6_3.i686.rpm
freeradius-perl-2.1.12-4.el6_3.i686.rpm
freeradius-postgresql-2.1.12-4.el6_3.i686.rpm
freeradius-python-2.1.12-4.el6_3.i686.rpm
freeradius-unixODBC-2.1.12-4.el6_3.i686.rpm
freeradius-utils-2.1.12-4.el6_3.i686.rpm

x86_64:
freeradius-debuginfo-2.1.12-4.el6_3.x86_64.rpm
freeradius-krb5-2.1.12-4.el6_3.x86_64.rpm
freeradius-ldap-2.1.12-4.el6_3.x86_64.rpm
freeradius-mysql-2.1.12-4.el6_3.x86_64.rpm
freeradius-perl-2.1.12-4.el6_3.x86_64.rpm
freeradius-postgresql-2.1.12-4.el6_3.x86_64.rpm
freeradius-python-2.1.12-4.el6_3.x86_64.rpm
freeradius-unixODBC-2.1.12-4.el6_3.x86_64.rpm
freeradius-utils-2.1.12-4.el6_3.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-2012-3547.html
https://access.redhat.com/security/updates/classification/#moderate

8. Contact:

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

Copyright 2012 Red Hat, Inc.
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