SecurityTracker.com
Keep Track of the Latest Vulnerabilities
with SecurityTracker!
    Home    |    View Topics    |    Search    |    Contact Us    |   

SecurityTracker
Archives


 
Sign Up
Sign Up for Your FREE Weekly SecurityTracker E-mail Alert Summary
Instant Alerts
Buy our Premium Vulnerability Notification Service to receive customized, instant alerts
Affiliates
Put SecurityTracker Vulnerability Alerts on Your Web Site -- It's Free!
Partners
Become a Partner and License Our Database or Notification Service
Report a Bug
Report a vulnerability that you have found to SecurityTracker
bugs
@
securitytracker.com





Category:   Application (Generic)  >   Glibc Vendors:   GNU [multiple authors]
(Red Hat Issues Fix) Glibc Multiple Bugs Allow FORTIFY_SOURCE Protection Mechanism to Be Bypassed
SecurityTracker Alert ID:  1027283
SecurityTracker URL:  http://securitytracker.com/id/1027283
CVE Reference:   CVE-2012-3406   (Links to External Site)
Date:  Jul 19 2012
Impact:   Execution of arbitrary code via local system, Execution of arbitrary code via network, User access via local system, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   Several vulnerabilities were reported in Glibc. A remote or local user can bypass format string protection to execute arbitrary code.

If a format string flaw exists in the target application, a remote or local user can trigger a buffer allocation error [CVE-2012-3404], memory initialization error [CVE-2012-3405], or access control error [CVE-2012-3406] in the FORTIFY_SOURCE format string protection mechanism and bypass the protection ostensibly provided by the mechanism to exploit the format string flaw.
Impact:   A remote or local user may be able to execute arbitrary code on the target system.
Solution:   Red Hat has issued a fix for CVE-2012-3406.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2012-1097.html
Vendor URL:  www.gnu.org/software/libc/ (Links to External Site)
Cause:   Access control error, Boundary error
Underlying OS:   Linux (Red Hat Enterprise)

Message History:   This archive entry is a follow-up to the message listed below.
Jul 18 2012 Glibc Multiple Bugs Allow FORTIFY_SOURCE Protection Mechanism to Be Bypassed


 Source Message Contents
Date:  Wed, 18 Jul 2012 15:29:21 +0000
Subject:  [RHSA-2012:1097-01] Moderate: glibc security and bug fix update

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

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

Synopsis:          Moderate: glibc security and bug fix update
Advisory ID:       RHSA-2012:1097-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2012-1097.html
Issue date:        2012-07-18
CVE Names:         CVE-2012-3406 
=====================================================================

1. Summary:

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

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 (v. 5 server) - i386, ia64, ppc, s390x, x86_64
Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

3. Description:

The glibc packages provide the standard C and standard math libraries used
by multiple programs on the system. Without these libraries, the Linux
system cannot function properly.

It was discovered that the formatted printing functionality in glibc did
not properly restrict the use of alloca(). This could allow an attacker to
bypass FORTIFY_SOURCE protections and execute arbitrary code using a format
string flaw in an application, even though these protections are expected
to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This update also fixes the following bug:

* If a file or a string was in the IBM-930 encoding, and contained the
invalid multibyte character "0xffff", attempting to use iconv() (or the
iconv command) to convert that file or string to another encoding, such as
UTF-8, resulted in a segmentation fault. With this update, the conversion
code for the IBM-930 encoding recognizes this invalid character and calls
an error handler, rather than causing a segmentation fault. (BZ#837896)

All users of glibc are advised to upgrade to these updated packages, which
contain backported patches to fix these issues.

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/):

826943 - CVE-2012-3406 glibc: printf() unbound alloca() usage in case of positional parameters + many format specs

6. Package List:

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

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Client/en/os/SRPMS/glibc-2.5-81.el5_8.4.src.rpm

i386:
glibc-2.5-81.el5_8.4.i386.rpm
glibc-2.5-81.el5_8.4.i686.rpm
glibc-common-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i686.rpm
glibc-debuginfo-common-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.i386.rpm
glibc-headers-2.5-81.el5_8.4.i386.rpm
glibc-utils-2.5-81.el5_8.4.i386.rpm
nscd-2.5-81.el5_8.4.i386.rpm

x86_64:
glibc-2.5-81.el5_8.4.i686.rpm
glibc-2.5-81.el5_8.4.x86_64.rpm
glibc-common-2.5-81.el5_8.4.x86_64.rpm
glibc-debuginfo-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i686.rpm
glibc-debuginfo-2.5-81.el5_8.4.x86_64.rpm
glibc-debuginfo-common-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.x86_64.rpm
glibc-headers-2.5-81.el5_8.4.x86_64.rpm
glibc-utils-2.5-81.el5_8.4.x86_64.rpm
nscd-2.5-81.el5_8.4.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
ftp://ftp.redhat.com/pub/redhat/linux/enterprise/5Server/en/os/SRPMS/glibc-2.5-81.el5_8.4.src.rpm

i386:
glibc-2.5-81.el5_8.4.i386.rpm
glibc-2.5-81.el5_8.4.i686.rpm
glibc-common-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i686.rpm
glibc-debuginfo-common-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.i386.rpm
glibc-headers-2.5-81.el5_8.4.i386.rpm
glibc-utils-2.5-81.el5_8.4.i386.rpm
nscd-2.5-81.el5_8.4.i386.rpm

ia64:
glibc-2.5-81.el5_8.4.i686.rpm
glibc-2.5-81.el5_8.4.ia64.rpm
glibc-common-2.5-81.el5_8.4.ia64.rpm
glibc-debuginfo-2.5-81.el5_8.4.i686.rpm
glibc-debuginfo-2.5-81.el5_8.4.ia64.rpm
glibc-devel-2.5-81.el5_8.4.ia64.rpm
glibc-headers-2.5-81.el5_8.4.ia64.rpm
glibc-utils-2.5-81.el5_8.4.ia64.rpm
nscd-2.5-81.el5_8.4.ia64.rpm

ppc:
glibc-2.5-81.el5_8.4.ppc.rpm
glibc-2.5-81.el5_8.4.ppc64.rpm
glibc-common-2.5-81.el5_8.4.ppc.rpm
glibc-debuginfo-2.5-81.el5_8.4.ppc.rpm
glibc-debuginfo-2.5-81.el5_8.4.ppc64.rpm
glibc-devel-2.5-81.el5_8.4.ppc.rpm
glibc-devel-2.5-81.el5_8.4.ppc64.rpm
glibc-headers-2.5-81.el5_8.4.ppc.rpm
glibc-utils-2.5-81.el5_8.4.ppc.rpm
nscd-2.5-81.el5_8.4.ppc.rpm

s390x:
glibc-2.5-81.el5_8.4.s390.rpm
glibc-2.5-81.el5_8.4.s390x.rpm
glibc-common-2.5-81.el5_8.4.s390x.rpm
glibc-debuginfo-2.5-81.el5_8.4.s390.rpm
glibc-debuginfo-2.5-81.el5_8.4.s390x.rpm
glibc-devel-2.5-81.el5_8.4.s390.rpm
glibc-devel-2.5-81.el5_8.4.s390x.rpm
glibc-headers-2.5-81.el5_8.4.s390x.rpm
glibc-utils-2.5-81.el5_8.4.s390x.rpm
nscd-2.5-81.el5_8.4.s390x.rpm

x86_64:
glibc-2.5-81.el5_8.4.i686.rpm
glibc-2.5-81.el5_8.4.x86_64.rpm
glibc-common-2.5-81.el5_8.4.x86_64.rpm
glibc-debuginfo-2.5-81.el5_8.4.i386.rpm
glibc-debuginfo-2.5-81.el5_8.4.i686.rpm
glibc-debuginfo-2.5-81.el5_8.4.x86_64.rpm
glibc-debuginfo-common-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.i386.rpm
glibc-devel-2.5-81.el5_8.4.x86_64.rpm
glibc-headers-2.5-81.el5_8.4.x86_64.rpm
glibc-utils-2.5-81.el5_8.4.x86_64.rpm
nscd-2.5-81.el5_8.4.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-2012-3406.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.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.4 (GNU/Linux)

iD8DBQFQBtY4XlSAg2UNWIIRAgxaAJ9JvAX7lw/9KWNIc7oiV83BY6HTawCfbCEK
vp+gffA7Y5ZuRVrwAdccwa8=
=HBmV
-----END PGP SIGNATURE-----


--
RHSA-announce mailing list
RHSA-announce@redhat.com
https://www.redhat.com/mailman/listinfo/rhsa-announce


Go to the Top of This SecurityTracker Archive Page



Home   |    View Topics   |    Search   |    Contact Us

Copyright 2013, SecurityGlobal.net LLC