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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2010:0670
The remote host is missing updates announced in
advisory RHSA-2010:0670.

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

This update fixes the following security issues:

* When an application has a stack overflow, the stack could silently
overwrite another memory mapped area instead of a segmentation fault
occurring, which could cause an application to execute arbitrary code,
possibly leading to privilege escalation. It is known that the X Window
System server can be used to trigger this flaw. (CVE-2010-2240, Important)

* A miscalculation of the size of the free space of the initial directory
entry in a directory leaf block was found in the Linux kernel Global File
System 2 (GFS2) implementation. A local, unprivileged user with write
access to a GFS2-mounted file system could perform a rename operation on
that file system to trigger a NULL pointer dereference, possibly resulting
in a denial of service or privilege escalation. (CVE-2010-2798, Important)

Red Hat would like to thank the X.Org security team for reporting
CVE-2010-2240, with upstream acknowledging Rafal Wojtczuk as the original
and Grant Diffey of CenITex for reporting CVE-2010-2798.

This update also fixes the following bugs:

* Problems receiving network traffic correctly via a non-standard layer 3
protocol when using the ixgbe driver. This update corrects this issue.

* A bug was found in the way the megaraid_sas driver (for SAS based RAID
controllers) handled physical disks and management IOCTLs. All physical
disks were exported to the disk layer, allowing an oops in
megasas_complete_cmd_dpc() when completing the IOCTL command if a timeout
occurred. One possible trigger for this bug was running mkfs. This update
resolves this issue by updating the megaraid_sas driver to version 4.31.

* Previously, Message Signaled Interrupts (MSI) resulted in PCI bus writes
to mask and unmask the MSI IRQ for a PCI device. These unnecessary PCI bus
writes resulted in the serialization of MSIs, leading to poor performance
on systems with high MSI load. This update adds a new kernel boot
parameter, msi_nolock, which forgoes the PCI bus writes and allows for
better simultaneous processing of MSIs. (BZ#621939)

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 : High

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2010-2240
Bugtraq: 20110428 VMSA-2011-0007 VMware ESXi and ESX Denial of Service and third party updates for Likewise components and ESX Service Console (Google Search)
Debian Security Information: DSA-2094 (Google Search)
RedHat Security Advisories: RHSA-2010:0661
Common Vulnerability Exposure (CVE) ID: CVE-2010-2798
BugTraq ID: 42124
Bugtraq: 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console (Google Search)
SuSE Security Announcement: SUSE-SA:2010:040 (Google Search)
SuSE Security Announcement: SUSE-SA:2010:054 (Google Search)
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