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Insecure Library Loading
Not critical

Xen Multiple Denial of Service Vulnerabilities

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Release Date:  2012-11-13    Views:  1,983

Secunia Advisory SA51200

Where:

Local system

Impact:

DoS

Solution Status:

Vendor Patch

Software:

CVE Reference(s):

Description


Multiple vulnerabilities have been reported in Xen, which can be exploited by malicious, local users in a guest virtual machine to cause a DoS (Denial of Service).

1) An error when handling the VCPU deadline can be exploited to trigger an infinite loop and cause a crash.

2) An out-of-bounds read error within the "domain_pirq_to_emuirq()" function when handling pirq values can be exploited to cause a crash.

3) An error when handling "set_p2m_entry()" call fails exhausts memory reserved for the p2m table and can be exploited to trigger an exception and cause a crash.

4) An error when handling the "HVMOP_pagetable_dying()" hypercall can be exploited to cause a crash.

5) An error within the "GNTTABOP_get_status_frames()" function can be exploited to trigger an infinite loop and cause a crash.

Please see the vendor's advisory for a list of affected versions.


Solution:
Apply patches (please see the vendor's advisory for more information).

Provided and/or discovered by:
Reported by the vendor.

Original Advisory:
Xen (XSA-20, XSA-21, XSA-22, XSA-23, XSA-24):
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00001.html
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00003.html
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00005.html
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00004.html
http://lists.xen.org/archives/html/xen-announce/2012-11/msg00002.html

Deep Links:
Links available to Secunia VIM customers

Do you have additional information related to this advisory?

Please provide information about patches, mitigating factors, new versions, exploits, faulty patches, links, and other relevant data by posting comments to this Advisory. You can also send this information to vuln@secunia.com

Subject: Xen Multiple Denial of Service Vulnerabilities

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