Vulnerability CVE-2010-4247
Published: 2011-01-10   Modified: 2012-02-13

Description:
The do_block_io_op function in (1) drivers/xen/blkback/blkback.c and (2) drivers/xen/blktap/blktap.c in Xen before 3.4.0 for the Linux kernel 2.6.18, and possibly other versions, allows guest OS users to cause a denial of service (infinite loop and CPU consumption) via a large production request index to the blkback or blktap back-end drivers. NOTE: some of these details are obtained from third party information.

Type:

CWE-20

 (Improper Input Validation)

CVSS2 => (AV:A/AC:L/Au:S/C:N/I:N/A:C)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.5/10
6.9/10
5.1/10
Exploit range
Attack complexity
Authentication
Adjacent network
Low
Single time
Confidentiality impact
Integrity impact
Availability impact
None
None
Complete
Affected software
Citrix -> XEN 

 References:
http://www.openwall.com/lists/oss-security/2010/11/23/1
http://www.openwall.com/lists/oss-security/2010/11/24/8
http://www.redhat.com/support/errata/RHSA-2011-0004.html
http://www.securityfocus.com/archive/1/520102/100/0/threaded
http://www.securityfocus.com/bid/45029
http://www.vmware.com/security/advisories/VMSA-2011-0012.html
http://www.vupen.com/english/advisories/2011/0024
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d
https://bugzilla.redhat.com/show_bug.cgi?id=656206
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