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QEMU Disk Format Security Bypass
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Secunia Advisory:
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SA30111
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Release Date:
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2008-05-08
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Last Update:
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2008-08-15
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Popularity:
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2,899 views
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Critical:
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Less critical
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Impact:
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Security Bypass
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Where:
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Local system
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Solution Status:
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Vendor Workaround
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| Software: | QEMU 0.x
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| CVE reference: | CVE-2008-1945
CVE-2008-2004
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Description:
Some vulnerabilities have been reported in QEMU, which can be exploited by malicious, local users to bypass certain security restrictions.
The vulnerabilities are caused due to the "drive_init()" function in vl.c and "do_change_block()" function in monitor.c determining the format of a disk from data contained in the disk's header. This can be exploited by a malicious user in a guest system to e.g. read arbitrary files on the host by writing a fake header to a raw formatted disk image.
The vulnerabilities are reported in version 0.9.1. Other versions may also be affected.
Solution:
Fixed in the SVN repository.
http://svn.savannah.gnu.org/viewvc/?view=rev&root=qemu&revision=4277
http://svn.savannah.gnu.org/viewvc/?view=rev&root=qemu&revision=4747
Provided and/or discovered by:
The vendor credits Avi Kivity. Additional information provided by Mandriva.
Changelog:
2008-08-15: Added additional information provided by Mandriva. Updated "Solution" section and added CVE reference.
Original Advisory:
http://lists.gnu.org/archive/html/qemu-devel/2008-04/msg00675.html
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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