Vulnerability Monitor

The vendors, products, and vulnerabilities you care about

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.

Security Impact Summary

CVE-2010-4247 is a security vulnerability that . Impacting 2 products from citrix, from linux organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-01-11T03:00:04.063

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.5 (MEDIUM)

CVSSv2 Vector

AV:A/AC:L/Au:S/C:N/I:N/A:C

Access Vector: ADJACENT_NETWORK
Access Complexity: LOW
Authentication: SINGLE
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: COMPLETE

Exploitability Score

5.1

Impact Score

6.9

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	citrix	xen	≤ 3.3.2	Yes
Application	citrix	xen	3.0.2	Yes
Application	citrix	xen	3.0.3	Yes
Application	citrix	xen	3.0.4	Yes
Application	citrix	xen	3.1.3	Yes
Application	citrix	xen	3.1.4	Yes
Application	citrix	xen	3.2.0	Yes
Application	citrix	xen	3.2.1	Yes
Application	citrix	xen	3.2.2	Yes
Application	citrix	xen	3.2.3	Yes
Application	citrix	xen	3.3.0	Yes
Application	citrix	xen	3.3.1	Yes
Operating System	linux	linux_kernel	2.6.18	No

References

http://secunia.com/advisories/35093 Vendor Advisory ([email protected])
http://secunia.com/advisories/42789 ([email protected])
http://secunia.com/advisories/46397 ([email protected])
http://www.openwall.com/lists/oss-security/2010/11/23/1 Patch ([email protected])
http://www.openwall.com/lists/oss-security/2010/11/24/8 Patch ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-0004.html ([email protected])
http://www.securityfocus.com/archive/1/520102/100/0/threaded ([email protected])
http://www.securityfocus.com/bid/45029 ([email protected])
http://www.vmware.com/security/advisories/VMSA-2011-0012.html ([email protected])
http://www.vupen.com/english/advisories/2011/0024 ([email protected])
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c Patch ([email protected])
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d Patch ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=656206 Patch ([email protected])
http://secunia.com/advisories/35093 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/42789 (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/46397 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2010/11/23/1 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2010/11/24/8 Patch (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-0004.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/520102/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/45029 (af854a3a-2127-422b-91ae-364da2661108)
http://www.vmware.com/security/advisories/VMSA-2011-0012.html (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0024 (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/7070d34f251c Patch (af854a3a-2127-422b-91ae-364da2661108)
http://xenbits.xensource.com/linux-2.6.18-xen.hg?rev/77f831cbb91d Patch (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=656206 Patch (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For citrix's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.