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Vulnerability Details : CVE-2010-4247

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.
Publish Date : 2011-01-10 Last Update Date : 2012-03-19
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- CVSS Scores & Vulnerability Types

CVSS Score
5.5
Confidentiality Impact None (There is no impact to the confidentiality of the system.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact Complete (There is a total shutdown of the affected resource. The attacker can render the resource completely unavailable.)
Access Complexity Low (Specialized access conditions or extenuating circumstances do not exist. Very little knowledge or skill is required to exploit. )
Authentication Single system (The vulnerability requires an attacker to be logged into the system (such as at a command line or via a desktop session or web interface).)
Gained Access None
Vulnerability Type(s) Denial Of Service
CWE ID 20

- Additional Vendor Supplied Data

Vendor Impact CVSS Score CVSS Vector Report Date Publish Date
Redhat moderate
5.5
AV:A/AC:L/Au:S/C:N/I:N/A:C 2010-11-23 2008-01-18
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- Related OVAL Definitions

Title Definition Id Class Family
ELSA-2011:0004: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:23232 unix
RHSA-2011:0004: kernel security, bug fix, and enhancement update (Important) oval:org.mitre.oval:def:21680 unix
RHSA-2011:0004: kernel security, bug fix, and enhancement update (Important) oval:com.redhat.rhsa:def:20110004 unix
VMware ESX third party updates for Service Console packages glibc and dhcp oval:org.mitre.oval:def:20468 unix
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2010-4247

# Product Type Vendor Product Version Update Edition Language
1 Application Citrix XEN 3.0.2 Version Details Vulnerabilities
2 Application Citrix XEN 3.0.3 Version Details Vulnerabilities
3 Application Citrix XEN 3.0.4 Version Details Vulnerabilities
4 Application Citrix XEN 3.1.3 Version Details Vulnerabilities
5 Application Citrix XEN 3.1.4 Version Details Vulnerabilities
6 Application Citrix XEN 3.2.0 Version Details Vulnerabilities
7 Application Citrix XEN 3.2.1 Version Details Vulnerabilities
8 Application Citrix XEN 3.2.2 Version Details Vulnerabilities
9 Application Citrix XEN 3.2.3 Version Details Vulnerabilities
10 Application Citrix XEN 3.3.0 Version Details Vulnerabilities
11 Application Citrix XEN 3.3.1 Version Details Vulnerabilities
12 Application Citrix XEN 3.3.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Citrix XEN 12

- References For CVE-2010-4247

http://www.openwall.com/lists/oss-security/2010/11/24/8
MLIST [oss-security] 20101124 Re: CVE request: xen: request-processing loop is unbounded in blkback
http://secunia.com/advisories/42789
SECUNIA 42789
http://secunia.com/advisories/46397
SECUNIA 46397
http://www.redhat.com/support/errata/RHSA-2011-0004.html
REDHAT RHSA-2011:0004
http://www.securityfocus.com/bid/45029
BID 45029 Xen 'drivers/xen/blkback/blkback.c' Local Denial Of Service Vulnerability Release Date:2011-10-13
http://www.securityfocus.com/archive/1/archive/1/520102/100/0/threaded
BUGTRAQ 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console
http://www.vupen.com/english/advisories/2011/0024
VUPEN ADV-2011-0024
http://secunia.com/advisories/35093
SECUNIA 35093
http://www.vmware.com/security/advisories/VMSA-2011-0012.html CONFIRM
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c
https://bugzilla.redhat.com/show_bug.cgi?id=656206 CONFIRM
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d
http://www.openwall.com/lists/oss-security/2010/11/23/1
MLIST [oss-security] 20101123 CVE request: xen: request-processing loop is unbounded in blkback

- Vulnerability Conditions

Vulnerability is valid if product versions listed below are used TOGETHER WITH(AND)

- Metasploit Modules Related To CVE-2010-4247

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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