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KVM Multiple Vulnerabilities
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Secunia Advisory:
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SA29129
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Release Date:
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2008-02-26
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Last Update:
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2008-05-19
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Popularity:
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2,399 views
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Critical:
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Moderately critical
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Impact:
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Security Bypass
DoS
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Where:
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Local system
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Solution Status:
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Partial Fix
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| Software: | KVM (Kernel-based Virtual Machine)
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2007-1320
CVE-2007-1321
CVE-2007-1322
CVE-2007-1323
CVE-2007-1366
CVE-2007-5729
CVE-2007-5730
CVE-2007-6227
CVE-2008-0928
CVE-2008-2004
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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:
Update to release 69, which fixed vulnerabilities CVE-2007-1320 and CVE-2008-2004.
Restrict access to trusted users only.
Provided and/or discovered by:
1) Ian Jackson
2, 3) Reported in KVM by Jamie Strandboge via a Debian bug report.
Changelog:
2008-05-08: Added vulnerabilities #2 and #3 to the advisory. Updated credits and the "Original Advisory" section. Added CVE references and increased criticality.
2008-05-19: Updated "Solution" and "Original Advisory" section.
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
Other References:
SA25073:
http://secunia.com/advisories/25073/
SA30111:
http://secunia.com/advisories/30111/
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About this Secunia Advisory
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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.
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