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AUSCERT External Security Bulletin Redistribution
ESB-2015.2151
Moderate: pam security update
19 August 2015
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: pam
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 7
Red Hat Enterprise Linux WS/Desktop 7
Red Hat Enterprise Linux Server 6
Red Hat Enterprise Linux WS/Desktop 6
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Privileged Data -- Remote/Unauthenticated
Denial of Service -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2015-3238
Original Bulletin:
https://rhn.redhat.com/errata/RHSA-2015-1640.html
Comment: This advisory references vulnerabilities in products which run on
platforms other than Red Hat. It is recommended that administrators
running pam check for an updated version of the software for their
operating system.
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Red Hat Security Advisory
Synopsis: Moderate: pam security update
Advisory ID: RHSA-2015:1640-01
Product: Red Hat Enterprise Linux
Advisory URL: https://rhn.redhat.com/errata/RHSA-2015-1640.html
Issue date: 2015-08-18
CVE Names: CVE-2015-3238
=====================================================================
1. Summary:
An updated pam package that fixes one security issue is now available for
Red Hat Enterprise Linux 6 and 7.
Red Hat Product Security 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 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 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 (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 6) - i386, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64
3. Description:
Pluggable Authentication Modules (PAM) provide a system whereby
administrators can set up authentication policies without having to
recompile programs to handle authentication.
It was discovered that the _unix_run_helper_binary() function of PAM's
unix_pam module could write to a blocking pipe, possibly causing the
function to become unresponsive. An attacker able to supply large passwords
to the unix_pam module could use this flaw to enumerate valid user
accounts, or cause a denial of service on the system. (CVE-2015-3238)
Red Hat would like to thank Sebastien Macke of Trustwave SpiderLabs for
reporting this issue.
All pam users are advised to upgrade to this updated package, which
contains 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/):
1228571 - CVE-2015-3238 pam: DoS/user enumeration due to blocking pipe in pam_unix module
6. Package List:
Red Hat Enterprise Linux Desktop (v. 6):
Source:
pam-1.1.1-20.el6_7.1.src.rpm
i386:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
x86_64:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-1.1.1-20.el6_7.1.x86_64.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Desktop Optional (v. 6):
i386:
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
x86_64:
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node (v. 6):
Source:
pam-1.1.1-20.el6_7.1.src.rpm
x86_64:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-1.1.1-20.el6_7.1.x86_64.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux HPC Node Optional (v. 6):
x86_64:
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 6):
Source:
pam-1.1.1-20.el6_7.1.src.rpm
i386:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
ppc64:
pam-1.1.1-20.el6_7.1.ppc.rpm
pam-1.1.1-20.el6_7.1.ppc64.rpm
pam-debuginfo-1.1.1-20.el6_7.1.ppc.rpm
pam-debuginfo-1.1.1-20.el6_7.1.ppc64.rpm
pam-devel-1.1.1-20.el6_7.1.ppc.rpm
pam-devel-1.1.1-20.el6_7.1.ppc64.rpm
s390x:
pam-1.1.1-20.el6_7.1.s390.rpm
pam-1.1.1-20.el6_7.1.s390x.rpm
pam-debuginfo-1.1.1-20.el6_7.1.s390.rpm
pam-debuginfo-1.1.1-20.el6_7.1.s390x.rpm
pam-devel-1.1.1-20.el6_7.1.s390.rpm
pam-devel-1.1.1-20.el6_7.1.s390x.rpm
x86_64:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-1.1.1-20.el6_7.1.x86_64.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Workstation (v. 6):
Source:
pam-1.1.1-20.el6_7.1.src.rpm
i386:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
x86_64:
pam-1.1.1-20.el6_7.1.i686.rpm
pam-1.1.1-20.el6_7.1.x86_64.rpm
pam-debuginfo-1.1.1-20.el6_7.1.i686.rpm
pam-debuginfo-1.1.1-20.el6_7.1.x86_64.rpm
pam-devel-1.1.1-20.el6_7.1.i686.rpm
pam-devel-1.1.1-20.el6_7.1.x86_64.rpm
Red Hat Enterprise Linux Client (v. 7):
Source:
pam-1.1.8-12.el7_1.1.src.rpm
x86_64:
pam-1.1.8-12.el7_1.1.i686.rpm
pam-1.1.8-12.el7_1.1.x86_64.rpm
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
Red Hat Enterprise Linux Client Optional (v. 7):
x86_64:
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
pam-devel-1.1.8-12.el7_1.1.i686.rpm
pam-devel-1.1.8-12.el7_1.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode (v. 7):
Source:
pam-1.1.8-12.el7_1.1.src.rpm
x86_64:
pam-1.1.8-12.el7_1.1.i686.rpm
pam-1.1.8-12.el7_1.1.x86_64.rpm
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
Red Hat Enterprise Linux ComputeNode Optional (v. 7):
x86_64:
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
pam-devel-1.1.8-12.el7_1.1.i686.rpm
pam-devel-1.1.8-12.el7_1.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
pam-1.1.8-12.el7_1.1.src.rpm
ppc64:
pam-1.1.8-12.el7_1.1.ppc.rpm
pam-1.1.8-12.el7_1.1.ppc64.rpm
pam-debuginfo-1.1.8-12.el7_1.1.ppc.rpm
pam-debuginfo-1.1.8-12.el7_1.1.ppc64.rpm
pam-devel-1.1.8-12.el7_1.1.ppc.rpm
pam-devel-1.1.8-12.el7_1.1.ppc64.rpm
s390x:
pam-1.1.8-12.el7_1.1.s390.rpm
pam-1.1.8-12.el7_1.1.s390x.rpm
pam-debuginfo-1.1.8-12.el7_1.1.s390.rpm
pam-debuginfo-1.1.8-12.el7_1.1.s390x.rpm
pam-devel-1.1.8-12.el7_1.1.s390.rpm
pam-devel-1.1.8-12.el7_1.1.s390x.rpm
x86_64:
pam-1.1.8-12.el7_1.1.i686.rpm
pam-1.1.8-12.el7_1.1.x86_64.rpm
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
pam-devel-1.1.8-12.el7_1.1.i686.rpm
pam-devel-1.1.8-12.el7_1.1.x86_64.rpm
Red Hat Enterprise Linux Server (v. 7):
Source:
pam-1.1.8-12.ael7b_1.1.src.rpm
ppc64le:
pam-1.1.8-12.ael7b_1.1.ppc64le.rpm
pam-debuginfo-1.1.8-12.ael7b_1.1.ppc64le.rpm
pam-devel-1.1.8-12.ael7b_1.1.ppc64le.rpm
Red Hat Enterprise Linux Workstation (v. 7):
Source:
pam-1.1.8-12.el7_1.1.src.rpm
x86_64:
pam-1.1.8-12.el7_1.1.i686.rpm
pam-1.1.8-12.el7_1.1.x86_64.rpm
pam-debuginfo-1.1.8-12.el7_1.1.i686.rpm
pam-debuginfo-1.1.8-12.el7_1.1.x86_64.rpm
pam-devel-1.1.8-12.el7_1.1.i686.rpm
pam-devel-1.1.8-12.el7_1.1.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-2015-3238
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 2015 Red Hat, Inc.
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