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A new version (0.9.0.0 - Release Candidate 1) of the free Secunia PSI
has been released. The new version includes many new and advanced
features, which makes it even easier to stay patched.

Download and test it today:
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Read more about this new version:
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TITLE:
Xen PAL Emulation "copy_to_user()" Security Bypass

SECUNIA ADVISORY ID:
SA28146

VERIFY ADVISORY:
http://secunia.com/advisories/28146/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
Local system

SOFTWARE:
Xen 3.x
http://secunia.com/product/15863/

DESCRIPTION:
A vulnerability has been reported in Xen, which can be exploited by
malicious, local users to bypass certain security restrictions.

The vulnerability is caused due to an error within the
"copy_to_user()" function in the PAL emulator. This can be exploited
by a HVM guest to gain access to arbitrary physical memory regions.

The vulnerability is reported in version 3.1.2 running on IA64
platforms. Other versions may also be affected.

SOLUTION:
Fixed in the development version.

PROVIDED AND/OR DISCOVERED BY:
Reported by the vendor.

ORIGINAL ADVISORY:
http://xenbits.xensource.com/ext/ia64/xen-unstable.hg?rev/e6069a715fd7

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About:
This Advisory was delivered by Secunia as a free service to help
everybody keeping their systems up to date against the latest
vulnerabilities.

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Please Note:
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clicking the link.
Secunia NEVER sends attached files with advisories.
Secunia does not advise people to install third party patches, only
use those supplied by the vendor.

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