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Red Hat Security Advisory 2016-0371-01

Red Hat Security Advisory 2016-0371-01
Posted Mar 9, 2016
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2016-0371-01 - Network Security Services is a set of libraries designed to support the cross-platform development of security-enabled client and server applications. A heap-based buffer overflow flaw was found in the way NSS parsed certain ASN.1 structures. An attacker could use this flaw to create a specially crafted certificate which, when parsed by NSS, could cause it to crash, or execute arbitrary code, using the permissions of the user running an application compiled against the NSS library.

tags | advisory, overflow, arbitrary
systems | linux, redhat
advisories | CVE-2016-1950
MD5 | f855d3fdd3c2a09db33de8fa90c74421

Red Hat Security Advisory 2016-0371-01

Change Mirror Download
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=====================================================================
Red Hat Security Advisory

Synopsis: Critical: nss security update
Advisory ID: RHSA-2016:0371-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2016-0371.html
Issue date: 2016-03-09
CVE Names: CVE-2016-1950
=====================================================================

1. Summary:

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

Red Hat Product Security has rated this update as having Critical 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
Red Hat Enterprise Linux Desktop Workstation (v. 5 client) - i386, x86_64

3. Description:

Network Security Services (NSS) is a set of libraries designed to support
the cross-platform development of security-enabled client and server
applications.

A heap-based buffer overflow flaw was found in the way NSS parsed certain
ASN.1 structures. An attacker could use this flaw to create a specially
crafted certificate which, when parsed by NSS, could cause it to crash, or
execute arbitrary code, using the permissions of the user running an
application compiled against the NSS library. (CVE-2016-1950)

Red Hat would like to thank the Mozilla project for reporting this issue.
Upstream acknowledges Francis Gabriel as the original reporter.

All nss users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. For the update to take
effect, all applications linked to the nss library must be restarted, or
the system rebooted.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

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

1310509 - CVE-2016-1950 nss: Heap buffer overflow vulnerability in ASN1 certificate parsing (MFSA 2016-35)

6. Package List:

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

Source:
nss-3.19.1-4.el5_11.src.rpm

i386:
nss-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-tools-3.19.1-4.el5_11.i386.rpm

x86_64:
nss-3.19.1-4.el5_11.i386.rpm
nss-3.19.1-4.el5_11.x86_64.rpm
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.x86_64.rpm
nss-tools-3.19.1-4.el5_11.x86_64.rpm

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

Source:
nss-3.19.1-4.el5_11.src.rpm

i386:
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-devel-3.19.1-4.el5_11.i386.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.i386.rpm

x86_64:
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.x86_64.rpm
nss-devel-3.19.1-4.el5_11.i386.rpm
nss-devel-3.19.1-4.el5_11.x86_64.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.i386.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.x86_64.rpm

Red Hat Enterprise Linux (v. 5 server):

Source:
nss-3.19.1-4.el5_11.src.rpm

i386:
nss-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-devel-3.19.1-4.el5_11.i386.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.i386.rpm
nss-tools-3.19.1-4.el5_11.i386.rpm

ia64:
nss-3.19.1-4.el5_11.i386.rpm
nss-3.19.1-4.el5_11.ia64.rpm
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.ia64.rpm
nss-devel-3.19.1-4.el5_11.ia64.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.ia64.rpm
nss-tools-3.19.1-4.el5_11.ia64.rpm

ppc:
nss-3.19.1-4.el5_11.ppc.rpm
nss-3.19.1-4.el5_11.ppc64.rpm
nss-debuginfo-3.19.1-4.el5_11.ppc.rpm
nss-debuginfo-3.19.1-4.el5_11.ppc64.rpm
nss-devel-3.19.1-4.el5_11.ppc.rpm
nss-devel-3.19.1-4.el5_11.ppc64.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.ppc.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.ppc64.rpm
nss-tools-3.19.1-4.el5_11.ppc.rpm

s390x:
nss-3.19.1-4.el5_11.s390.rpm
nss-3.19.1-4.el5_11.s390x.rpm
nss-debuginfo-3.19.1-4.el5_11.s390.rpm
nss-debuginfo-3.19.1-4.el5_11.s390x.rpm
nss-devel-3.19.1-4.el5_11.s390.rpm
nss-devel-3.19.1-4.el5_11.s390x.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.s390.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.s390x.rpm
nss-tools-3.19.1-4.el5_11.s390x.rpm

x86_64:
nss-3.19.1-4.el5_11.i386.rpm
nss-3.19.1-4.el5_11.x86_64.rpm
nss-debuginfo-3.19.1-4.el5_11.i386.rpm
nss-debuginfo-3.19.1-4.el5_11.x86_64.rpm
nss-devel-3.19.1-4.el5_11.i386.rpm
nss-devel-3.19.1-4.el5_11.x86_64.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.i386.rpm
nss-pkcs11-devel-3.19.1-4.el5_11.x86_64.rpm
nss-tools-3.19.1-4.el5_11.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/

7. References:

https://access.redhat.com/security/cve/CVE-2016-1950
https://access.redhat.com/security/updates/classification/#critical
https://www.mozilla.org/en-US/security/advisories/mfsa2016-36

8. Contact:

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

Copyright 2016 Red Hat, Inc.
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