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Red Hat Enterprise Linux 7: RHSA-2015:1483-01 Important libuser DoS Fix

Calendar Jul 23, 2015 • User Avatar LinuxSecurity Advisories
3 - 6 min read
Redhat Large Esm H500
Topics%20covered

Topics Covered

security advisory denial of service Red Hat Enterprise Linux important libuser CVE-2015-3245 CVE-2015-3246
Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having Important security [More...] 
====================================================================                   Red Hat Security Advisory

Synopsis:          Important: libuser security update
Advisory ID:       RHSA-2015:1483-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://access.redhat.com/errata/RHSA-2015:1483.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 7.

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 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, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, 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 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 Client (v. 7):

Source:
libuser-0.60-7.el7_1.src.rpm

x86_64:
libuser-0.60-7.el7_1.i686.rpm
libuser-0.60-7.el7_1.x86_64.rpm
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-python-0.60-7.el7_1.x86_64.rpm

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

x86_64:
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-devel-0.60-7.el7_1.i686.rpm
libuser-devel-0.60-7.el7_1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
libuser-0.60-7.el7_1.src.rpm

x86_64:
libuser-0.60-7.el7_1.i686.rpm
libuser-0.60-7.el7_1.x86_64.rpm
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-python-0.60-7.el7_1.x86_64.rpm

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

x86_64:
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-devel-0.60-7.el7_1.i686.rpm
libuser-devel-0.60-7.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
libuser-0.60-7.el7_1.src.rpm

ppc64:
libuser-0.60-7.el7_1.ppc.rpm
libuser-0.60-7.el7_1.ppc64.rpm
libuser-debuginfo-0.60-7.el7_1.ppc.rpm
libuser-debuginfo-0.60-7.el7_1.ppc64.rpm
libuser-python-0.60-7.el7_1.ppc64.rpm

s390x:
libuser-0.60-7.el7_1.s390.rpm
libuser-0.60-7.el7_1.s390x.rpm
libuser-debuginfo-0.60-7.el7_1.s390.rpm
libuser-debuginfo-0.60-7.el7_1.s390x.rpm
libuser-python-0.60-7.el7_1.s390x.rpm

x86_64:
libuser-0.60-7.el7_1.i686.rpm
libuser-0.60-7.el7_1.x86_64.rpm
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-python-0.60-7.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
libuser-0.60-7.ael7b_1.src.rpm

ppc64le:
libuser-0.60-7.ael7b_1.ppc64le.rpm
libuser-debuginfo-0.60-7.ael7b_1.ppc64le.rpm
libuser-python-0.60-7.ael7b_1.ppc64le.rpm

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

ppc64:
libuser-debuginfo-0.60-7.el7_1.ppc.rpm
libuser-debuginfo-0.60-7.el7_1.ppc64.rpm
libuser-devel-0.60-7.el7_1.ppc.rpm
libuser-devel-0.60-7.el7_1.ppc64.rpm

s390x:
libuser-debuginfo-0.60-7.el7_1.s390.rpm
libuser-debuginfo-0.60-7.el7_1.s390x.rpm
libuser-devel-0.60-7.el7_1.s390.rpm
libuser-devel-0.60-7.el7_1.s390x.rpm

x86_64:
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-devel-0.60-7.el7_1.i686.rpm
libuser-devel-0.60-7.el7_1.x86_64.rpm

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

ppc64le:
libuser-debuginfo-0.60-7.ael7b_1.ppc64le.rpm
libuser-devel-0.60-7.ael7b_1.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
libuser-0.60-7.el7_1.src.rpm

x86_64:
libuser-0.60-7.el7_1.i686.rpm
libuser-0.60-7.el7_1.x86_64.rpm
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-python-0.60-7.el7_1.x86_64.rpm

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

x86_64:
libuser-debuginfo-0.60-7.el7_1.i686.rpm
libuser-debuginfo-0.60-7.el7_1.x86_64.rpm
libuser-devel-0.60-7.el7_1.i686.rpm
libuser-devel-0.60-7.el7_1.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 . More contact
details at https://access.redhat.com/security/team/contact

Copyright 2015 Red Hat, Inc.

Red Hat Enterprise Linux 7: RHSA-2015:1483-01 Important libuser DoS Fix

red hat
Calendar Grey July 23, 2015
Dist Redhat Esm H88
Recent updates to the libuser packages resolve critical security vulnerabilities in Red Hat Enterprise Linux 7. Immediate upgrade is advised!
Updated libuser packages that fix two security issues are now available for Red Hat Enterprise Linux 7

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

Summary

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.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat Enterprise Linux important libuser CVE-2015-3245 CVE-2015-3246

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

Package List

Red Hat Enterprise Linux Client (v. 7):
Source: libuser-0.60-7.el7_1.src.rpm
x86_64: libuser-0.60-7.el7_1.i686.rpm libuser-0.60-7.el7_1.x86_64.rpm libuser-debuginfo-0.60-7.el7_1.i686.rpm libuser-debuginfo-0.60-7.el7_1.x86_64.rpm libuser-python-0.60-7.el7_1.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64: libuser-debuginfo-0.60-7.el7_1.i686.rpm libuser-debuginfo-0.60-7.el7_1.x86_64.rpm libuser-devel-0.60-7.el7_1.i686.rpm libuser-devel-0.60-7.el7_1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source: libuser-0.60-7.el7_1.src.rpm
x86_64: libuser-0.60-7.el7_1.i686.rpm libuser-0.60-7.el7_1.x86_64.rpm libuser-debuginfo-0.60-7.el7_1.i686.rpm libuser-debuginfo-0.60-7.el7_1.x86_64.rpm libuser-python-0.60-7.el7_1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64: libuser-debuginfo-0.60-7.el7_1.i686.rpm libuser-debuginfo-0.60-7.el7_1.x86_64.rpm libuser-devel-0.60-7.el7_1.i686.rpm libuser-devel-0.60-7.el7_1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source: libuser-0.60-7.el7_1.src.rpm
ppc64: libuser-0.60-7.el7_1.ppc.rpm libuser-0.60-7.el7_1.ppc64.rpm libuser-debuginfo-0.60-7.el7_1.ppc.rpm libuser-debuginfo-0.60-7.el7_1.ppc64.rpm libuser-python-0.60-7.el7_1.ppc64.rpm
s390x: libuser-0.60-7.el7_1.s390.rpm libuser-0.60-7.el7_1.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2015:1483-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2015:1483.html
Issue date: 2015-07-23

Topic

Updated libuser packages that fix two security issues are now available forRed Hat Enterprise Linux 7.Red Hat Product Security has rated this update as having Important securityimpact. Common Vulnerability Scoring System (CVSS) base scores, which givedetailed severity ratings, are available for each vulnerability from theCVE links in the References section.

Topics%20covered

Topics Covered

security advisory denial of service Red Hat Enterprise Linux important libuser CVE-2015-3245 CVE-2015-3246

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, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Server Optional (v. 7) - ppc64, ppc64le, s390x, x86_64

Red Hat Enterprise Linux Workstation (v. 7) - x86_64

Red Hat Enterprise Linux Workstation Optional (v. 7) - x86_64

Bugs Fixed

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

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