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ESB-2016.0037 - [RedHat] rpcbind: Denial of service - Remote/unauthenticated

Date: 08 January 2016
References: ESB-2015.2479  ESB-2015.2521.2  

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Click here for PGP verifiable version
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===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2016.0037
                     Moderate: rpcbind security update
                              8 January 2016

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           rpcbind
Publisher:         Red Hat
Operating System:  Red Hat Enterprise Linux Server 6
                   Red Hat Enterprise Linux WS/Desktop 6
                   Red Hat Enterprise Linux Server 7
                   Red Hat Enterprise Linux WS/Desktop 7
Impact/Access:     Denial of Service -- Remote/Unauthenticated
Resolution:        Patch/Upgrade
CVE Names:         CVE-2015-7236  

Reference:         ESB-2015.2521.2
                   ESB-2015.2479

Original Bulletin: 
   https://rhn.redhat.com/errata/RHSA-2016-0005.html

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

Synopsis:          Moderate: rpcbind security update
Advisory ID:       RHSA-2016:0005-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2016-0005.html
Issue date:        2016-01-07
CVE Names:         CVE-2015-7236 
=====================================================================

1. Summary:

Updated rpcbind packages that fix one security issue are 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 ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux Desktop (v. 6) - i386, x86_64
Red Hat Enterprise Linux HPC Node (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:

The rpcbind utility is a server that converts RPC program numbers into
universal addresses. It must be running on the host to be able to make RPC
calls on a server on that machine.

A use-after-free flaw related to the PMAP_CALLIT operation and TCP/UDP
connections was discovered in rpcbind. A remote attacker could possibly
exploit this flaw to crash the rpcbind service by performing a series of
UDP and TCP calls. (CVE-2015-7236)

All rpcbind users are advised to upgrade to these updated packages, which
contain a backported patch to correct this issue. If the rpcbind service
is running, it will be automatically restarted after installing this
update.

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/):

1264345 - CVE-2015-7236 rpcbind: Use-after-free vulnerability in PMAP_CALLIT

6. Package List:

Red Hat Enterprise Linux Desktop (v. 6):

Source:
rpcbind-0.2.0-11.el6_7.src.rpm

i386:
rpcbind-0.2.0-11.el6_7.i686.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.i686.rpm

x86_64:
rpcbind-0.2.0-11.el6_7.x86_64.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.x86_64.rpm

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

Source:
rpcbind-0.2.0-11.el6_7.src.rpm

x86_64:
rpcbind-0.2.0-11.el6_7.x86_64.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.x86_64.rpm

Red Hat Enterprise Linux Server (v. 6):

Source:
rpcbind-0.2.0-11.el6_7.src.rpm

i386:
rpcbind-0.2.0-11.el6_7.i686.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.i686.rpm

ppc64:
rpcbind-0.2.0-11.el6_7.ppc64.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.ppc64.rpm

s390x:
rpcbind-0.2.0-11.el6_7.s390x.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.s390x.rpm

x86_64:
rpcbind-0.2.0-11.el6_7.x86_64.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 6):

Source:
rpcbind-0.2.0-11.el6_7.src.rpm

i386:
rpcbind-0.2.0-11.el6_7.i686.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.i686.rpm

x86_64:
rpcbind-0.2.0-11.el6_7.x86_64.rpm
rpcbind-debuginfo-0.2.0-11.el6_7.x86_64.rpm

Red Hat Enterprise Linux Client (v. 7):

Source:
rpcbind-0.2.0-33.el7_2.src.rpm

x86_64:
rpcbind-0.2.0-33.el7_2.x86_64.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
rpcbind-0.2.0-33.el7_2.src.rpm

x86_64:
rpcbind-0.2.0-33.el7_2.x86_64.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
rpcbind-0.2.0-33.el7_2.src.rpm

ppc64:
rpcbind-0.2.0-33.el7_2.ppc64.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.ppc64.rpm

ppc64le:
rpcbind-0.2.0-33.el7_2.ppc64le.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.ppc64le.rpm

s390x:
rpcbind-0.2.0-33.el7_2.s390x.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.s390x.rpm

x86_64:
rpcbind-0.2.0-33.el7_2.x86_64.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.x86_64.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
rpcbind-0.2.0-33.el7_2.src.rpm

x86_64:
rpcbind-0.2.0-33.el7_2.x86_64.rpm
rpcbind-debuginfo-0.2.0-33.el7_2.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-2015-7236
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 2016 Red Hat, Inc.
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