Kod programskog paketa rhev-hypervisor6 uočeno je nekoliko sigurnosnih propusta koje napadač može iskoristiti za pokretanje proizvoljnog programskog koda te napad uskraćivanjem usluga.
Paket:
rhev-hypervisor 6.x
Operacijski sustavi:
Red Hat Enterprise Linux 6
Kritičnost:
8.7
Problem:
neodgovarajuće rukovanje datotekama, pogreška u programskoj funkciji, pogreška u programskoj komponenti, preljev međuspremnika
Problemi sigurnosti su posljedica preljeva međuspremnika u funkciji "xfs_readlink", pogrešaka u programskim komponentama "libvorbis" i "libxml2", nepravilne inicijalizacije "nsChildView" podatkovnih struktura, itd. Za detaljan uvid u sve nedostatke preporuča se pregled originalne preporuke.
Posljedica:
Zloćudni korisnik navedene propuste može iskoristiti za proizvoljno pokretanje programskog koda te DoS (eng. Denial of Service) napad.
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Red Hat Security Advisory
Synopsis: Moderate: rhev-hypervisor6 security and bug fix update
Advisory ID: RHSA-2012:0422-01
Product: Red Hat Enterprise Virtualization
Advisory URL: https://rhn.redhat.com/errata/RHSA-2012-0422.html
Issue date: 2012-03-26
CVE Names: CVE-2012-0045 CVE-2012-0207
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1. Summary:
An updated rhev-hypervisor6 package that fixes two security issues and one
bug is now available.
The Red Hat Security Response Team has rated this update as having moderate
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-6 - noarch
3. Description:
The rhev-hypervisor6 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 the Linux kernel's KVM hypervisor
implementation emulated the syscall instruction for 32-bit guests. An
unprivileged guest user could trigger this flaw to crash the guest.
(CVE-2012-0045)
A divide-by-zero flaw was found in the Linux kernel's igmp_heard_query()
function. An attacker able to send certain IGMP (Internet Group Management
Protocol) packets to a target system could use this flaw to cause a denial
of service. (CVE-2012-0207)
Red Hat would like to thank Stephan BÄ
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