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TITLE:
Citrix XenServer Ext2/Ext3 Processing Security Bypass Vulnerability

SECUNIA ADVISORY ID:
SA32774

VERIFY ADVISORY:
http://secunia.com/advisories/32774/

CRITICAL:
Less critical

IMPACT:
Security Bypass

WHERE:
Local system

SOFTWARE:
Citrix XenServer 4.x
http://secunia.com/advisories/product/19197/

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

The vulnerability is caused due to an error when processing specially
crafted Ext2 and Ext3 images. This can be exploited to potentially
execute arbitrary code in the control domain by writing specially
crafted data to an Ext2 or Ext3 partition used to boot a guest
domain.

This is related to:
SA27889

The vulnerability is reported in version 4.1.0 and prior.

SOLUTION:
Apply hotfix.

XenServer 4.1.0:
http://support.citrix.com/article/CTX119081

XenServer 4.0.1:
http://support.citrix.com/article/CTX119080

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

ORIGINAL ADVISORY:
http://support.citrix.com/article/CTX118766

OTHER REFERENCES:
SA27889:
http://secunia.com/advisories/27889/

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