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Xen "xenbaked" Insecure Temporary Files Advisory Available in Danish  Advisory Available in German 

Secunia Advisory: SA27389  
Release Date: 2007-10-24

Critical:
Less critical
Impact: Manipulation of data
Where: Local system
Solution Status: Unpatched

Software:Xen 3.x

CVE reference:CVE-2007-3919 (Secunia mirror)

This advisory is currently marked as unpatched!
- Companies can be alerted when a patch is released!


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



Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.

Secunia collects, validates, and verifies all vulnerability reports issued by security research groups, vendors, and others.

5 Related Secunia Security Advisories

1. Xen PVFB Shared Framebuffer Processing Vulnerability
2. Xen Multiple Vulnerabilities
3. Xen PAL Emulation "copy_to_user()" Security Bypass
4. Xen "mov_to_rr" Security Bypass Vulnerability
5. Xen Multiple Vulnerabilities


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