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

Synopsis:          Moderate: libtasn1 security update
Advisory ID:       RHSA-2014:0687-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2014-0687.html
Issue date:        2014-06-10
CVE Names:         CVE-2014-3467 CVE-2014-3468 CVE-2014-3469 
=====================================================================

1. Summary:

Updated libtasn1 packages that fix three security issues are now available
for Red Hat Enterprise Linux 7.

The Red Hat Security Response Team has rated this update as having Moderate
security impact. Common Vulnerability Scoring System (CVSS) base scores,
which give detailed severity ratings, are available for each vulnerability
from the CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux Client Optional (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode Optional (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

3. Description:

The libtasn1 library provides Abstract Syntax Notation One (ASN.1) parsing
and structures management, and Distinguished Encoding Rules (DER) encoding
and decoding functions.

It was discovered that the asn1_get_bit_der() function of the libtasn1
library incorrectly reported the length of ASN.1-encoded data. Specially
crafted ASN.1 input could cause an application using libtasn1 to perform
an out-of-bounds access operation, causing the application to crash or,
possibly, execute arbitrary code. (CVE-2014-3468)

Multiple incorrect buffer boundary check issues were discovered in
libtasn1. Specially crafted ASN.1 input could cause an application using
libtasn1 to crash. (CVE-2014-3467)

Multiple NULL pointer dereference flaws were found in libtasn1's
asn1_read_value() function. Specially crafted ASN.1 input could cause an
application using libtasn1 to crash, if the application used the
aforementioned function in a certain way. (CVE-2014-3469)

Red Hat would like to thank GnuTLS upstream for reporting these issues.

All libtasn1 users are advised to upgrade to these updated packages, which
correct these issues. For the update to take effect, all applications
linked to the libtasn1 library must be restarted.

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/site/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1102022 - CVE-2014-3467 libtasn1: multiple boundary check issues
1102323 - CVE-2014-3468 libtasn1: asn1_get_bit_der() can return negative bit length
1102329 - CVE-2014-3469 libtasn1: asn1_read_value_type() NULL pointer dereference

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
libtasn1-3.3-5.el7_0.src.rpm

x86_64:
libtasn1-3.3-5.el7_0.i686.rpm
libtasn1-3.3-5.el7_0.x86_64.rpm
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux Client Optional (v. 7):

x86_64:
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-devel-3.3-5.el7_0.i686.rpm
libtasn1-devel-3.3-5.el7_0.x86_64.rpm
libtasn1-tools-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
libtasn1-3.3-5.el7_0.src.rpm

x86_64:
libtasn1-3.3-5.el7_0.i686.rpm
libtasn1-3.3-5.el7_0.x86_64.rpm
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux ComputeNode Optional (v. 7):

x86_64:
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-devel-3.3-5.el7_0.i686.rpm
libtasn1-devel-3.3-5.el7_0.x86_64.rpm
libtasn1-tools-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
libtasn1-3.3-5.el7_0.src.rpm

ppc64:
libtasn1-3.3-5.el7_0.ppc.rpm
libtasn1-3.3-5.el7_0.ppc64.rpm
libtasn1-debuginfo-3.3-5.el7_0.ppc.rpm
libtasn1-debuginfo-3.3-5.el7_0.ppc64.rpm
libtasn1-devel-3.3-5.el7_0.ppc.rpm
libtasn1-devel-3.3-5.el7_0.ppc64.rpm

s390x:
libtasn1-3.3-5.el7_0.s390.rpm
libtasn1-3.3-5.el7_0.s390x.rpm
libtasn1-debuginfo-3.3-5.el7_0.s390.rpm
libtasn1-debuginfo-3.3-5.el7_0.s390x.rpm
libtasn1-devel-3.3-5.el7_0.s390.rpm
libtasn1-devel-3.3-5.el7_0.s390x.rpm

x86_64:
libtasn1-3.3-5.el7_0.i686.rpm
libtasn1-3.3-5.el7_0.x86_64.rpm
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-devel-3.3-5.el7_0.i686.rpm
libtasn1-devel-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux Server Optional (v. 7):

ppc64:
libtasn1-debuginfo-3.3-5.el7_0.ppc64.rpm
libtasn1-tools-3.3-5.el7_0.ppc64.rpm

s390x:
libtasn1-debuginfo-3.3-5.el7_0.s390x.rpm
libtasn1-tools-3.3-5.el7_0.s390x.rpm

x86_64:
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-tools-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
libtasn1-3.3-5.el7_0.src.rpm

x86_64:
libtasn1-3.3-5.el7_0.i686.rpm
libtasn1-3.3-5.el7_0.x86_64.rpm
libtasn1-debuginfo-3.3-5.el7_0.i686.rpm
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-devel-3.3-5.el7_0.i686.rpm
libtasn1-devel-3.3-5.el7_0.x86_64.rpm

Red Hat Enterprise Linux Workstation Optional (v. 7):

x86_64:
libtasn1-debuginfo-3.3-5.el7_0.x86_64.rpm
libtasn1-tools-3.3-5.el7_0.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-2014-3467.html
https://www.redhat.com/security/data/cve/CVE-2014-3468.html
https://www.redhat.com/security/data/cve/CVE-2014-3469.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 2014 Red Hat, Inc.
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