Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

BID:26190

Info

Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

Bugtraq ID: 26190
Class: Design Error
CVE: CVE-2007-3919
Remote: No
Local: Yes
Published: Oct 23 2007 12:00AM
Updated: May 13 2008 08:55PM
Credit: Steve Kemp from Debian disclosed this vulnerability.
Vulnerable: XenSource Xen 3.0
Redhat Fedora Core7
Redhat Enterprise Linux Virtualization 5 Server
Redhat Enterprise Linux Desktop Workstation 5 client
Redhat Enterprise Linux Desktop Multi OS 5 client
Redhat Enterprise Linux 5 Server
Mandriva Linux Mandrake 2007.1 x86_64
Mandriva Linux Mandrake 2007.1
Mandriva Linux Mandrake 2007.0 x86_64
Mandriva Linux Mandrake 2007.0
MandrakeSoft Corporate Server 4.0 x86_64
MandrakeSoft Corporate Server 4.0
Debian Linux 4.0 sparc
Debian Linux 4.0 s/390
Debian Linux 4.0 powerpc
Debian Linux 4.0 mipsel
Debian Linux 4.0 mips
Debian Linux 4.0 m68k
Debian Linux 4.0 ia-64
Debian Linux 4.0 ia-32
Debian Linux 4.0 hppa
Debian Linux 4.0 arm
Debian Linux 4.0 amd64
Debian Linux 4.0 alpha
Debian Linux 4.0
Not Vulnerable:

Discussion

Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

Xen is prone to a security vulnerability because it creates temporary files in an insecure manner.

An attacker with local access could potentially exploit this issue to perform symlink attacks, overwriting arbitrary files in the context of the affected application.

Successfully mounting a symlink attack may allow the attacker to overwrite or corrupt sensitive files, which may result in a denial of service. Other attacks may also be possible.

This issue affects Xen 3.0; other versions may also be vulnerable.

Exploit / POC

Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

An attacker uses readily available commands to exploit the issue.

Solution / Fix

Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

Solution:
Please see the referenced advisories for more information.

References

Xen 'xenmon.py' and 'xenbaked' Insecure Temporary File Creation Vulnerability

References:
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