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Insecure Library Loading
Moderately critical

KVM Multiple Vulnerabilities

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Release Date:  2008-02-26    Last Update:  2008-12-26    Views:  11,938

Secunia Advisory SA29129

Where:

Local system

Impact:

Security Bypass, DoS

Solution Status:

Partial Fix

CVE Reference(s):

Description


Some vulnerabilities have been reported in KVM, which can be exploited by malicious, local users to bypass certain security restrictions or cause a DoS (Denial of Service).

1) The block device backends do not properly check a guest's read or write attempts, which can be exploited out of a KVM guest system to e.g. crash the KVM host or potentially escape the virtualisation jail by writing into arbitrary host memory.

Note: Successful exploitation requires privileges to send specially crafted read or write requests to the block device backends.

This is related to vulnerability #7 in:
SA25073

2) Several vulnerabilities can be exploited by malicious, local users to bypass certain security restrictions or cause a DoS (Denial of Service).

For more information see vulnerabilities #1-#6 in:
SA25073

3) An error can be exploited by a guest to read arbitrary files on the host via a specially crafted disk header.

For more information:
SA30111


Solution:
Release kvm-82 fixes CVE-2007-5729 and correctly fixes CVE-2007-1320 (previously incorrectly fixed by release kvm-69, CVE-2008-4539).

Further details available to Secunia VIM customers

Provided and/or discovered by:
1) Ian Jackson
2, 3) Reported in KVM by Jamie Strandboge via a Debian bug report.

Original Advisory:
1) http://marc.info/?l=debian-security&m=120343592917055&w=2
2, 3) http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=480011

http://sourceforge.net/project/shownotes.php?release_id=600309

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: KVM Multiple Vulnerabilities

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