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Test ID:
Category:Red Hat Local Security Checks
Title:RedHat Security Advisory RHSA-2011:0017
The remote host is missing updates announced in
advisory RHSA-2011:0017.

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

This update fixes the following security issues:

* A NULL pointer dereference flaw was found in the igb driver in the Linux
kernel. If both the Single Root I/O Virtualization (SR-IOV) feature and
promiscuous mode were enabled on an interface using igb, it could result in
a denial of service when a tagged VLAN packet is received on that
interface. (CVE-2010-4263, Important)

* A missing sanity check was found in vbd_create() in the Xen hypervisor
implementation. As CD-ROM drives are not supported by the blkback back-end
driver, attempting to use a virtual CD-ROM drive with blkback could trigger
a denial of service (crash) on the host system running the Xen hypervisor.
(CVE-2010-4238, Moderate)

* A flaw was found in the Linux kernel execve() system call implementation.
A local, unprivileged user could cause large amounts of memory to be
allocated but not visible to the OOM (Out of Memory) killer, triggering a
denial of service. (CVE-2010-4243, Moderate)

* A flaw was found in fixup_page_fault() in the Xen hypervisor
implementation. If a 64-bit para-virtualized guest accessed a certain area
of memory, it could cause a denial of service on the host system running
the Xen hypervisor. (CVE-2010-4255, Moderate)

* A missing initialization flaw was found in the bfa driver used by Brocade
Fibre Channel Host Bus Adapters. A local, unprivileged user could use this
flaw to cause a denial of service by reading a file in the
/sys/class/fc_host/host#/statistics/ directory. (CVE-2010-4343, Moderate)

* Missing initialization flaws in the Linux kernel could lead to
information leaks. (CVE-2010-3296, CVE-2010-3877, CVE-2010-4072,
CVE-2010-4073, CVE-2010-4075, CVE-2010-4080, CVE-2010-4081, CVE-2010-4158,

Red Hat would like to thank Kosuke Tatsukawa for reporting CVE-2010-4263

Vladymyr Denysov for reporting CVE-2010-4238
Brad Spengler for reporting
Dan Rosenberg for reporting CVE-2010-3296, CVE-2010-4073,
CVE-2010-4075, CVE-2010-4080, CVE-2010-4081, and CVE-2010-4158
Kulikov for reporting CVE-2010-3877
and Kees Cook for reporting

These updated packages also include several hundred bug fixes for and
enhancements to the Linux kernel. Space precludes documenting each of these
changes in this advisory and users are directed to the Red Hat Enterprise
Linux 5.6 Release Notes for information on the most significant of these

Refer to the kernel chapter in the Red Hat Enterprise Linux 5.6 Technical
Notes for further information:

All Red Hat Enterprise Linux 5 users are advised to install these updated
packages, which address these vulnerabilities as well as fixing the bugs
and adding the enhancements noted in the Red Hat Enterprise Linux 5.6
Release Notes and Technical Notes. 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

CVSS Score:

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2010-3296
BugTraq ID: 43221
Bugtraq: 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console (Google Search)
Debian Security Information: DSA-2126 (Google Search)
SuSE Security Announcement: SUSE-SA:2010:050 (Google Search)
SuSE Security Announcement: SUSE-SA:2010:054 (Google Search)
SuSE Security Announcement: SUSE-SA:2011:007 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2010-3877
BugTraq ID: 44630
XForce ISS Database: kernel-getname-info-disc(64578)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4072
BugTraq ID: 45054
SuSE Security Announcement: SUSE-SA:2010:060 (Google Search)
SuSE Security Announcement: SUSE-SA:2011:001 (Google Search)
SuSE Security Announcement: SUSE-SA:2011:004 (Google Search)
SuSE Security Announcement: SUSE-SA:2011:008 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4073
BugTraq ID: 45073
Common Vulnerability Exposure (CVE) ID: CVE-2010-4075
BugTraq ID: 43806
Common Vulnerability Exposure (CVE) ID: CVE-2010-4080
BugTraq ID: 45058
BugTraq ID: 45063
SuSE Security Announcement: SUSE-SA:2011:002 (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4081
Common Vulnerability Exposure (CVE) ID: CVE-2010-4158
BugTraq ID: 44758
Bugtraq: 20101109 Kernel 0-day (Google Search)
Bugtraq: 20101118 Re: Kernel 0-day (Google Search)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4238
BugTraq ID: 45795
XForce ISS Database: xen-vdbcreate-dos(64698)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4243
BugTraq ID: 45004
XForce ISS Database: linux-kernel-execve-dos(64700)
Common Vulnerability Exposure (CVE) ID: CVE-2010-4255
Common Vulnerability Exposure (CVE) ID: CVE-2010-4263
BugTraq ID: 45208
Common Vulnerability Exposure (CVE) ID: CVE-2010-4343
BugTraq ID: 45262
Common Vulnerability Exposure (CVE) ID: CVE-2010-4258
SuSE Security Announcement: SUSE-SA:2011:005 (Google Search)
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