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Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2010:0893
The remote host is missing updates announced in
advisory RHSA-2010:0893.

The kernel packages contain the Linux kernel, the core of any Linux
operating system.

This update fixes the following security issue:

* Buffer overflow flaws were found in the Linux kernel's implementation of
the server-side External Data Representation (XDR) for the Network File
System (NFS) version 4. An attacker on the local network could send a
specially-crafted large compound request to the NFSv4 server, which could
possibly result in a kernel panic (denial of service) or, potentially, code
execution. (CVE-2010-2521, Important)

This update also fixes the following bugs:

* A race condition existed when generating new process IDs with the result
that the wrong process could have been signaled or killed accidentally,
leading to various application faults. This update detects and disallows
the reuse of PID numbers. (BZ#638864)

* When multiple JBD-based (Journaling Block Device) file systems were
mounted concurrently, and no other JBD-based file systems were already
mounted, a race could occur between JBD slab cache creation and deletion.

* A missing memory barrier caused a race condition in the AIO subsystem
between the read_events() and aio_complete() functions. This may have
caused a thread in read_events() to sleep indefinitely, possibly causing an
application hang. (BZ#638868)

Users should upgrade to these updated packages, which contain backported
patches to correct these issues. The system must be rebooted for this
update to take effect.

Please note that this update is available via
Red Hat Network. To use Red Hat Network, launch the Red
Hat Update Agent with the following command: up2date

Risk factor : Critical

CVSS Score:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2010-2521
BugTraq ID: 42249
Bugtraq: 20110211 VMSA-2011-0003 Third party component updates for VMware vCenter Server, vCenter Update Manager, ESXi and ESX (Google Search)
Debian Security Information: DSA-2094 (Google Search)
RedHat Security Advisories: RHSA-2010:0606
SuSE Security Announcement: SUSE-SA:2010:040 (Google Search)
CopyrightCopyright (c) 2010 E-Soft Inc.

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