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>> Xen "xenbaked" and "xenmon" Insecure Temporary File Handling Issue

Title : Xen "xenbaked" and "xenmon" Insecure Temporary File Handling Issue
VUPEN ID : VUPEN/ADV-2007-3621
CVE ID : CVE-2007-3919
Rated as : Low Risk 
Remotely Exploitable : No
Locally Exploitable : Yes
Release Date : 2007-10-25


Technical Description    Receive VUPEN Security alerts in a Text format  Receive VUPEN Security alerts in a PDF format  Receive VUPEN Security alerts in an XML format 

A vulnerability has been identified in Xen, which could be exploited by local attackers to bypass security restrictions. This issue is caused by an error in the "xenbaked" daemon and "xenmon" utility when handling the temporary file "/tmp/xenq-shm", which could allow malicious users to conduct symlink attacks and truncate arbitrary files with the privileges of the user invoking the vulnerable application.

Affected Products

Xen 3.x

Solution

Apply patch :
http://xenbits.xensource.com/xen-unstable.hg/rev/b28ae5f00553

References

http://www.vupen.com/english/advisories/2007/3621
http://xenbits.xensource.com/xen-unstable.hg/rev/b28ae5f00553
http://bugs.debian.org/447795

Credits

Vulnerability reported by Steve Kemp (Debian).

ChangeLog

2007-10-25 : Initial release

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