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TITLE:
Xen "xenbaked" Insecure Temporary Files

SECUNIA ADVISORY ID:
SA27389

VERIFY ADVISORY:
http://secunia.com/advisories/27389/

CRITICAL:
Less critical

IMPACT:
Manipulation of data

WHERE:
Local system

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

DESCRIPTION:
Steve Kemp has reported a security issue in Xen, which can be
exploited by malicious, local users to truncate arbitrary files.

The security issue is caused due to the "xenbaked" program truncating
the file "/tmp/xenq-shm" in an insecure manner, which can be exploited
via symlink attacks to truncate arbitrary files.

The security issue is reported in version 3.1. Other versions may
also be affected.

SOLUTION:
Restrict access to trusted users only.

PROVIDED AND/OR DISCOVERED BY:
Steve Kemp, Debian Security Audit project

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=447795

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