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Debian 4.0: DSA 1384-1 Critical Xen-Utils Code Execution Advisory

debian
Calendar Grey October 5, 2007
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Debian addresses vulnerabilities in xen-utils packages to mitigate potential arbitrary code execution risks. Updating is advised for enhanced security.
Several local vulnerabilities have been discovered in the Xen hypervisor packages which may lead to the execution of arbitrary code

Summary


CVE-2007-4993

By use of a specially crafted grub configuration file a domU user
may be able to execute arbitary code upon the dom0 when pygrub is
being used.

CVE-2007-1320

Multiple heap-based buffer overflows in the Cirrus VGA extension,
provided by QEMU, may allow local users to execute arbitrary code
via "bitblt" heap overflow.


For the stable distribution (etch), these problems have been fixed in version
3.0.3-0-3.

For the unstable distribution (sid), these problems will be fixed soon.

We recommend that you upgrade your xen-utils package.


Upgrade instructions
- --------------------wget url
will fetch the file for you
dpkg -i file.deb
will install the referenced file.

If you are using the apt-get package manager, use the line for
sources.list as given below:

apt-get update
will update the internal database
apt-get upgrade
will install corrected packages

You may use an automated update by adding the resources from the
footer...

Read the Full Advisory

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