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Red Hat Security Advisory 2015-1482-01

Red Hat Security Advisory 2015-1482-01
Posted Jul 23, 2015
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2015-1482-01 - The libuser library implements a standardized interface for manipulating and administering user and group accounts. Sample applications that are modeled after applications from the shadow password suite are included in these packages. Two flaws were found in the way the libuser library handled the /etc/passwd file. A local attacker could use an application compiled against libuser to manipulate the /etc/passwd file, which could result in a denial of service or possibly allow the attacker to escalate their privileges to root.

tags | advisory, denial of service, local, root
systems | linux, redhat
advisories | CVE-2015-3245, CVE-2015-3246
SHA-256 | 62f04998ed0f8898f85e4682c6bbdbf75ff623230c1af30c88f3efa928cb67a6

Red Hat Security Advisory 2015-1482-01

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

Synopsis: Important: libuser security update
Advisory ID: RHSA-2015:1482-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1482.html
Issue date: 2015-07-23
CVE Names: CVE-2015-3245 CVE-2015-3246
=====================================================================

1. Summary:

Updated libuser packages that fix two security issues are now available for
Red Hat Enterprise Linux 6.

Red Hat Product Security has rated this update as having Important 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 Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux Desktop Optional (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (v. 6) - x86_64
Red Hat Enterprise Linux HPC Node Optional (v. 6) - x86_64
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:

The libuser library implements a standardized interface for manipulating
and administering user and group accounts. Sample applications that are
modeled after applications from the shadow password suite (shadow-utils)
are included in these packages.

Two flaws were found in the way the libuser library handled the /etc/passwd
file. A local attacker could use an application compiled against libuser
(for example, userhelper) to manipulate the /etc/passwd file, which could
result in a denial of service or possibly allow the attacker to escalate
their privileges to root. (CVE-2015-3245, CVE-2015-3246)

Red Hat would like to thank Qualys for reporting these issues.

All libuser users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue.

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/):

1233043 - CVE-2015-3245 libuser does not filter newline characters in the GECOS field
1233052 - CVE-2015-3246 libuser: Security flaw in handling /etc/passwd file

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
libuser-0.56.13-8.el6_7.src.rpm

i386:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-python-0.56.13-8.el6_7.i686.rpm

x86_64:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-0.56.13-8.el6_7.x86_64.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-python-0.56.13-8.el6_7.x86_64.rpm

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

i386:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm

x86_64:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.x86_64.rpm

Red Hat Enterprise Linux HPC Node (v. 6):

Source:
libuser-0.56.13-8.el6_7.src.rpm

x86_64:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-0.56.13-8.el6_7.x86_64.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-python-0.56.13-8.el6_7.x86_64.rpm

Red Hat Enterprise Linux HPC Node Optional (v. 6):

x86_64:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
libuser-0.56.13-8.el6_7.src.rpm

i386:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-python-0.56.13-8.el6_7.i686.rpm

ppc64:
libuser-0.56.13-8.el6_7.ppc.rpm
libuser-0.56.13-8.el6_7.ppc64.rpm
libuser-debuginfo-0.56.13-8.el6_7.ppc.rpm
libuser-debuginfo-0.56.13-8.el6_7.ppc64.rpm
libuser-python-0.56.13-8.el6_7.ppc64.rpm

s390x:
libuser-0.56.13-8.el6_7.s390.rpm
libuser-0.56.13-8.el6_7.s390x.rpm
libuser-debuginfo-0.56.13-8.el6_7.s390.rpm
libuser-debuginfo-0.56.13-8.el6_7.s390x.rpm
libuser-python-0.56.13-8.el6_7.s390x.rpm

x86_64:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-0.56.13-8.el6_7.x86_64.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-python-0.56.13-8.el6_7.x86_64.rpm

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

i386:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm

ppc64:
libuser-debuginfo-0.56.13-8.el6_7.ppc.rpm
libuser-debuginfo-0.56.13-8.el6_7.ppc64.rpm
libuser-devel-0.56.13-8.el6_7.ppc.rpm
libuser-devel-0.56.13-8.el6_7.ppc64.rpm

s390x:
libuser-debuginfo-0.56.13-8.el6_7.s390.rpm
libuser-debuginfo-0.56.13-8.el6_7.s390x.rpm
libuser-devel-0.56.13-8.el6_7.s390.rpm
libuser-devel-0.56.13-8.el6_7.s390x.rpm

x86_64:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
libuser-0.56.13-8.el6_7.src.rpm

i386:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-python-0.56.13-8.el6_7.i686.rpm

x86_64:
libuser-0.56.13-8.el6_7.i686.rpm
libuser-0.56.13-8.el6_7.x86_64.rpm
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-python-0.56.13-8.el6_7.x86_64.rpm

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

i386:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm

x86_64:
libuser-debuginfo-0.56.13-8.el6_7.i686.rpm
libuser-debuginfo-0.56.13-8.el6_7.x86_64.rpm
libuser-devel-0.56.13-8.el6_7.i686.rpm
libuser-devel-0.56.13-8.el6_7.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-2015-3245
https://access.redhat.com/security/cve/CVE-2015-3246
https://access.redhat.com/security/updates/classification/#important

8. Contact:

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

Copyright 2015 Red Hat, Inc.
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