U programskom paketu qemu-kvm otkrivena je sigurnosna ranjivost koja se može iskoristiti za izvođenje DoS napada ili proizvoljno izvršavanje programskog koda s ovlastima korisnika koji je pokrenuo program.
Paket:
qemu-kvm 0.x
Operacijski sustavi:
Ubuntu Linux 10.04, Ubuntu Linux 10.10, Ubuntu Linux 11.04, Ubuntu Linux 11.10
Kritičnost:
7.1
Problem:
pogreška u programskoj komponenti, preljev međuspremnika
Propust nastaje jer QEMU obavlja neodgovarajuću provjeru paketa u e1000 upravljačkom programu (eng. driver).
Posljedica:
Udaljeni zlonamjerni korisnik može iskoristiti navedeni propust za izvođenje DoS napada ili moguće proizvoljno izvršavanje programskog koda s ovlastima korisnika koji je pokrenuo program.
==========================================================================
Ubuntu Security Notice USN-1339-1
January 23, 2012
qemu-kvm vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 11.10
- Ubuntu 11.04
- Ubuntu 10.10
- Ubuntu 10.04 LTS
Summary:
A remote attacker could cause QEMU to crash.
Software Description:
- qemu-kvm: Machine emulator and virtualizer
Details:
Nicolae Mogoreanu discovered that QEMU did not properly verify legacy mode
packets in the e1000 network driver. A remote attacker could exploit this
to cause a denial of service or possibly execute code with the privileges
of the user invoking the program.
When using QEMU with libvirt or virtualization management software based on
libvirt such as Eucalyptus and OpenStack, QEMU guests are individually
isolated by an AppArmor profile by default in Ubuntu.
Update instructions:
The problem can be corrected by updating your system to the following
package versions:
Ubuntu 11.10:
qemu-kvm 0.14.1+noroms-0ubuntu6.2
Ubuntu 11.04:
qemu-kvm 0.14.0+noroms-0ubuntu4.5
Ubuntu 10.10:
qemu-kvm 0.12.5+noroms-0ubuntu7.11
qemu-kvm-extras 0.12.5+noroms-0ubuntu7.11
qemu-kvm-extras-static 0.12.5+noroms-0ubuntu7.11
Ubuntu 10.04 LTS:
qemu-kvm 0.12.3+noroms-0ubuntu9.17
qemu-kvm-extras 0.12.3+noroms-0ubuntu9.17
qemu-kvm-extras-static 0.12.3+noroms-0ubuntu9.17
After a standard system update you need to restart running virtual machines
which use the e1000 network driver to make all the necessary changes.
References:
http://www.ubuntu.com/usn/usn-1339-1
CVE-2012-0029
Package Information:
https://launchpad.net/ubuntu/+source/qemu-kvm/0.14.1+noroms-0ubuntu6.2
https://launchpad.net/ubuntu/+source/qemu-kvm/0.14.0+noroms-0ubuntu4.5
https://launchpad.net/ubuntu/+source/qemu-kvm/0.12.5+noroms-0ubuntu7.11
https://launchpad.net/ubuntu/+source/qemu-kvm/0.12.3+noroms-0ubuntu9.17
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