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AUSCERT External Security Bulletin Redistribution
Important: rhev-hypervisor5 security and bug fix update
14 September 2012
AusCERT Security Bulletin Summary
Publisher: Red Hat
Operating System: Red Hat Enterprise Linux Server 5
Red Hat Enterprise Linux WS/Desktop 5
Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated
Increased Privileges -- Existing Account
Denial of Service -- Remote/Unauthenticated
CVE Names: CVE-2012-3515 CVE-2012-3480
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Red Hat Security Advisory
Synopsis: Important: rhev-hypervisor5 security and bug fix update
Advisory ID: RHSA-2012:1262-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-1262.html
Issue date: 2012-09-13
CVE Names: CVE-2012-3480 CVE-2012-3515
An updated rhev-hypervisor5 package that fixes multiple security issues and
various bugs is now available.
The Red Hat Security Response Team has rated this update as having
important security impact. Common Vulnerability Scoring System (CVSS) base
scores, which give detailed severity ratings, are available for each
vulnerability from the CVE links in the References section.
2. Relevant releases/architectures:
RHEV Hypervisor for RHEL-5 - noarch
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.
A flaw was found in the way QEMU handled VT100 terminal escape sequences
when emulating certain character devices. A guest user with privileges to
write to a character device that is emulated on the host using a virtual
console back-end could use this flaw to crash the qemu-kvm process on the
host or, possibly, escalate their privileges on the host. (CVE-2012-3515)
Multiple integer overflow flaws, leading to stack-based buffer overflows,
were found in glibc's functions for converting a string to a numeric
representation (strtod(), strtof(), and strtold()). If an application used
such a function on attacker controlled input, it could cause the
application to crash or, potentially, execute arbitrary code.
Red Hat would like to thank the Xen project for reporting the CVE-2012-3515
This updated package provides updated components that include various bug
fixes, as well as a fix for CVE-2012-3515 in the xen package; however, for
this component, it had no security impact on Red Hat Enterprise
Virtualization Hypervisor itself.
Users of Red Hat Enterprise Virtualization Hypervisor are advised to
upgrade to this updated package, which fixes these issues.
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
To upgrade Hypervisors in Red Hat Enterprise Virtualization
2.2 environments using the disk image provided by this package, refer to:
To upgrade Hypervisors in Red Hat Enterprise Virtualization
3.0 environments using the disk image provided by this package, refer to:
5. Bugs fixed (http://bugzilla.redhat.com/):
847715 - CVE-2012-3480 glibc: Integer overflows, leading to stack-based buffer overflows in strto* related routines
851252 - CVE-2012-3515 qemu: VT100 emulation vulnerability
6. Package List:
RHEV Hypervisor for RHEL-5:
These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
The Red Hat security contact is <email@example.com>. More contact
details at https://access.redhat.com/security/team/contact/
Copyright 2012 Red Hat, Inc.
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