RHSA-2010:0567 - Security Advisory

Topic

An updated lvm2-cluster package that fixes one security issue is now
available for Red Hat Enterprise Linux 5.

The Red Hat Security Response Team 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.

Description

The lvm2-cluster package contains support for Logical Volume Management
(LVM) in a clustered environment.

It was discovered that the cluster logical volume manager daemon (clvmd)
did not verify the credentials of clients connecting to its control UNIX
abstract socket, allowing local, unprivileged users to send control
commands that were intended to only be available to the privileged root
user. This could allow a local, unprivileged user to cause clvmd to exit,
or request clvmd to activate, deactivate, or reload any logical volume on
the local system or another system in the cluster. (CVE-2010-2526)

Note: This update changes clvmd to use a pathname-based socket rather than
an abstract socket. As such, the lvm2 update RHBA-2010:0569, which changes
LVM to also use this pathname-based socket, must also be installed for LVM
to be able to communicate with the updated clvmd.

All lvm2-cluster users should upgrade to this updated package, which
contains a backported patch to correct this issue. After installing the
updated package, clvmd must be restarted for the update to take effect.

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 Resilient Storage for x86_64 5 x86_64
• Red Hat Enterprise Linux Resilient Storage for x86_64 5 ppc
• Red Hat Enterprise Linux Resilient Storage for x86_64 5 ia64
• Red Hat Enterprise Linux Resilient Storage for x86_64 5 i386
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 5 x86_64
• Red Hat Enterprise Linux Resilient Storage (for RHEL Server) from RHUI 5 i386

Fixes

• BZ - 614248 - CVE-2010-2526 lvm2-cluster: insecurity when communicating between lvm2 and clvmd

CVEs

• CVE-2010-2526

References

• http://www.redhat.com/security/updates/classification/#moderate