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Category:   Application (Generic)  >   Rpcbind Vendors:   libtirpc.sourceforge.net
(Red Hat Issues Fix) Rpcbind Pointer Error Lets Remote Users Cause the Target Service to Crash
SecurityTracker Alert ID:  1034612
SecurityTracker URL:  http://securitytracker.com/id/1034612
CVE Reference:   CVE-2015-7236   (Links to External Site)
Date:  Jan 8 2016
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in Rpcbind. A remote user can cause the target service to crash.

A remote user can send specifically crafted packets to the target rpcbind daemon to trigger a netbuf pointer management flaw and cause the target service to crash.

Impact:   A remote user can cause the target service to crash.
Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

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

Vendor URL:  rhn.redhat.com/errata/RHSA-2016-0005.html (Links to External Site)
Cause:   Access control error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  6, 7

Message History:   This archive entry is a follow-up to the message listed below.
Sep 29 2015 Rpcbind Pointer Error Lets Remote Users Cause the Target Service to Crash



 Source Message Contents

Subject:  [RHSA-2016:0005-01] Moderate: rpcbind security update

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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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