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Security Advisory Moderate: rhev-hypervisor5 security and bug fix update

Advisory: RHSA-2012:1185-1
Type: Security Advisory
Severity: Moderate
Issued on: 2012-08-21
Last updated on: 2012-08-21
Affected Products: Red Hat Enterprise Virtualization
CVEs (cve.mitre.org): CVE-2012-3406

Details

An updated rhev-hypervisor5 package that fixes one security issue and
various bugs is now available.

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.

The rhev-hypervisor5 package provides a Red Hat Enterprise Virtualization
Hypervisor ISO disk image. The Red Hat Enterprise Virtualization
Hypervisor is a dedicated Kernel-based Virtual Machine (KVM) hypervisor.
It includes everything necessary to run and manage virtual machines: A
subset of the Red Hat Enterprise Linux operating environment and the Red
Hat Enterprise Virtualization Agent.

Note: Red Hat Enterprise Virtualization Hypervisor is only available for
the Intel 64 and AMD64 architectures with virtualization extensions.

It was discovered that the formatted printing functionality in glibc did
not properly restrict the use of alloca(). This could allow an attacker to
bypass FORTIFY_SOURCE protections and execute arbitrary code using a format
string flaw in an application, even though these protections are expected
to limit the impact of such flaws to an application abort. (CVE-2012-3406)

This updated package provides updated components that include fixes for
various security issues. These issues have no security impact on Red Hat
Enterprise Virtualization Hypervisor itself, however. The security fixes
included in this update address the following CVE numbers:

CVE-2012-3817 (bind issue)

CVE-2012-3571 (dhcp issue)

CVE-2012-2313 (kernel issue)

CVE-2012-0441 (nss issue)

CVE-2012-2337 and CVE-2012-3440 (sudo issues)

CVE-2012-2625 (xen issue)

Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which fixes 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
https://access.redhat.com/knowledge/articles/11258

To upgrade Hypervisors in Red Hat Enterprise Virtualization
2.2 environments using the disk image provided by this package, refer to:

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/5/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html

To upgrade Hypervisors in Red Hat Enterprise Virtualization
3.0 environments using the disk image provided by this package, refer to:

https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Hypervisor_Deployment_Guide/chap-Deployment_Guide-Upgrading_Red_Hat_Enterprise_Virtualization_Hypervisors.html

Updated packages

Red Hat Enterprise Virtualization

x86_64:
rhev-hypervisor5-5.8-20120808.0.el5_8.noarch.rpm
File outdated by:  RHBA-2013:0181
    MD5: 24f87906ad4d01ba79be6d470b52eb4e
SHA-256: af94c0ed4fc4503fed5a75019ab8ea28cad467336a493d684670a983d789f226
rhev-hypervisor5-tools-5.8-20120808.0.el5_8.noarch.rpm
File outdated by:  RHBA-2013:0181
    MD5: 6ecf14cde0ea7b320421d224e22b6e3a
SHA-256: d6047ef79e6c91a356a076967ab679ab9b2bd5645a909bc004a42560baad6cc4
 
(The unlinked packages above are only available from the Red Hat Network)

Bugs fixed (see bugzilla for more information)

826943 - CVE-2012-3406 glibc: printf() unbound alloca() usage in case of positional parameters + many format specs


References



These packages are GPG signed by Red Hat for security. Our key and details on how to verify the signature are available from:
https://www.redhat.com/security/team/key/#package

The Red Hat security contact is secalert@redhat.com. More contact details at http://www.redhat.com/security/team/contact/