RHSA-2013:0509 - Security Advisory

Topic

Updated RDMA packages that fix multiple security issues, various bugs, and
add an enhancement are now available for Red Hat Enterprise Linux 6.

The Red Hat Security Response Team has rated this update as having low
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.

Description

Red Hat Enterprise Linux includes a collection of InfiniBand and iWARP
utilities, libraries and development packages for writing applications
that use Remote Direct Memory Access (RDMA) technology.

A denial of service flaw was found in the way ibacm managed reference
counts for multicast connections. An attacker could send specially-crafted
multicast packets that would cause the ibacm daemon to crash.
(CVE-2012-4517)

It was found that the ibacm daemon created some files with world-writable
permissions. A local attacker could use this flaw to overwrite the
contents of the ibacm.log or ibacm.port file, allowing them to mask
certain actions from the log or cause ibacm to run on a non-default port.
(CVE-2012-4518)

CVE-2012-4518 was discovered by Florian Weimer of the Red Hat Product
Security Team and Kurt Seifried of the Red Hat Security Response Team.

The InfiniBand/iWARP/RDMA stack components have been upgraded to more
recent upstream versions.

This update also fixes the following bugs:

• Previously, the "ibnodes -h" command did not show a proper usage message.

With this update the problem is fixed and "ibnodes -h" now shows the
correct usage message. (BZ#818606)

• Previously, the ibv_devinfo utility erroneously showed iWARP cxgb3

hardware's physical state as invalid even when the device was working. For
iWARP hardware, the phys_state field has no meaning. This update patches
the utility to not print out anything for this field when the hardware is
iWARP hardware. (BZ#822781)

• Prior to the release of Red Hat Enterprise Linux 6.3, the kernel created

the InfiniBand device files in the wrong place and a udev rules file was
used to force the devices to be created in the proper place. With the
update to 6.3, the kernel was fixed to create the InfiniBand device files
in the proper place, and so the udev rules file was removed as no longer
being necessary. However, a bug in the kernel device creation meant that,
although the devices were now being created in the right place, they had
incorrect permissions. Consequently, when users attempted to run an RDMA
application as a non-root user, the application failed to get the necessary
permissions to use the RDMA device and the application terminated. This
update puts a new udev rules file in place. It no longer attempts to create
the InfiniBand devices since they already exist, but it does correct the
device permissions on the files. (BZ#834428)

• Previously, using the "perfquery -C" command with a host name caused the

perfquery utility to become unresponsive. The list of controllers to
process was never cleared and the process looped infinitely on a single
controller. A patch has been applied to make sure that in the case where
the user passes in the -C option, the controller list is cleared out once
that controller has been processed. As a result, perfquery now works as
expected in the scenario described. (BZ#847129)

• The OpenSM init script did not handle the case where there were no

configuration files under "/etc/rdma/opensm.conf.*". With this update, the
script as been patched and the InfiniBand Subnet Manager, OpenSM, now
starts as expected in the scenario described. (BZ#862857)

This update also adds the following enhancement:

• This update provides an updated mlx4_ib Mellanox driver which includes

Single Root I/O Virtualization (SR-IOV) support. (BZ#869737)

All users of RDMA are advised to upgrade to these updated packages, which
fix these issues and add this enhancement.

Solution

Before applying this update, make sure all previously-released errata
relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to
use the Red Hat Network to apply this update are available at
https://access.redhat.com/knowledge/articles/11258

Affected Products

• Red Hat Enterprise Linux Server 6 x86_64
• Red Hat Enterprise Linux Server 6 i386
• Red Hat Enterprise Linux Workstation 6 x86_64
• Red Hat Enterprise Linux Workstation 6 i386
• Red Hat Enterprise Linux Desktop 6 i386
• Red Hat Enterprise Linux for IBM z Systems 6 s390x
• Red Hat Enterprise Linux for Power, big endian 6 ppc64
• Red Hat Enterprise Linux for Scientific Computing 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 x86_64
• Red Hat Enterprise Linux Server from RHUI 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support 6 i386
• Red Hat Enterprise Linux Desktop 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 6 s390x
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 x86_64
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension 6 i386
• Red Hat Enterprise Linux Server - Extended Life Cycle Support Extension (for IBM z Systems) 6 s390x

Fixes

• BZ - 865492 - CVE-2012-4517 ibacm: DoS (ibacm deamon crash) by joining responses for multicast destinations
• BZ - 865499 - CVE-2012-4518 ibacm: ibacm service files created with world writable permissions (DoS)

CVEs

• CVE-2012-4517
• CVE-2012-4518

References

• https://access.redhat.com/security/updates/classification/#low