RHSA-2011:0264 - Security Advisory

Topic

An updated rgmanager package that fixes multiple security issues and
several bugs is now available for Red Hat Cluster Suite 4.

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

The rgmanager package contains the Red Hat Resource Group Manager, which
provides high availability for critical server applications.

Multiple insecure temporary file use flaws were discovered in rgmanager and
various resource scripts run by rgmanager. A local attacker could use these
flaws to overwrite an arbitrary file writable by the rgmanager process
(i.e. user root) with the output of rgmanager or a resource agent via a
symbolic link attack. (CVE-2008-6552)

It was discovered that certain resource agent scripts set the
LD_LIBRARY_PATH environment variable to an insecure value containing empty
path elements. A local user able to trick a user running those scripts to
run them while working from an attacker-writable directory could use this
flaw to escalate their privileges via a specially-crafted dynamic library.
(CVE-2010-3389)

Red Hat would like to thank Raphael Geissert for reporting the
CVE-2010-3389 issue.

This update also fixes the following bugs:

• Previously, starting threads could incorrectly include a reference to an

exited thread if that thread exited when rgmanager received a request
to start a new thread. Due to this issue, the new thread did not retry and
entered an infinite loop. This update ensures that new threads do not
reference old threads. Now, new threads no longer enter an infinite loop
in which the rgmanager enables and disables services without failing
gracefully. (BZ#502872)

• Previously, nfsclient.sh left temporary nfsclient-status-cache-$$ files

in /tmp/. (BZ#506152)

• Previously, the function local_node_name in

/resources/utils/member_util.sh did not correctly check whether magma_tool
failed. Due to this issue, empty strings could be returned. This update
checks the input and rejects empty strings. (BZ#516758)

• Previously, the file system agent could kill a process when an

application used a mount point with a similar name to a mount point managed
by rgmanager using force_unmount. With this update, the file system agent
kills only the processes that access the mount point managed by rgmanager.
(BZ#555901)

• Previously, simultaneous execution of "lvchange --deltag" from

/etc/init.d/rgmanager caused a checksum error on High Availability Logical
Volume Manager (HA-LVM). With this update, ownership of LVM tags is checked
before removing them. (BZ#559582)

• Previously, the isAlive check could fail if two nodes used the same file

name. With this update, the isAlive function prevents two nodes from using
the same file name. (BZ#469815)

• Previously, the S/Lang code could lead to unwanted S/Lang stack leaks

during event processing. (BZ#507430)

All users of rgmanager are advised to upgrade to this updated package,
which corrects these issues.

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
http://kbase.redhat.com/faq/docs/DOC-11259

Affected Products

• Red Hat Enterprise Linux High Availability for x86_64 4 x86_64
• Red Hat Enterprise Linux High Availability for x86_64 4 ppc
• Red Hat Enterprise Linux High Availability for x86_64 4 ia64
• Red Hat Enterprise Linux High Availability for x86_64 4 i386

Fixes

• BZ - 469815 - clurgmgrd[15993]: <notice> status on clusterfs "gfs" returned 1 (generic error)
• BZ - 498985 - rgmanager is affected by several symlink attack vulnerabilities
• BZ - 506152 - nfsclient.sh leaves temporary files /tmp/nfsclient-status-cache-$$
• BZ - 507430 - S/Lang stack / memory leaks
• BZ - 516758 - rgmanager: local_node_name does not check if magma_tool failed.
• BZ - 519436 - CVE-2008-6552 cman, gfs2-utils, rgmanager: multiple insecure temporary file use issues
• BZ - 555901 - fs.sh can kill processes that are not on the mount point which is being unmounted
• BZ - 639044 - CVE-2010-3389 rgmanager: insecure library loading vulnerability

CVEs

• CVE-2008-6552
• CVE-2010-3389

References

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