Xen vbd_create() function denial of service
| xen-vdbcreate-dos (64698) |  Medium Risk |
Description:
Xen is vulnerable to a denial of service, caused by a missing sanity check in the vbd_create() function. A local attacker could exploit this vulnerability via a virtual CD-ROM drive with blkback to cause the host system to crash.
*CVSS:
| Base Score: | 4.9 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | None |
| Integrity Impact: | None |
| Availability Impact: | Complete |
| Temporal Score: | 3.6 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Denial of Service
Remedy:
Apply the appropriate patch for your system. See References.
References:
- Red Hat Bugzilla ¿ Bug 655623 : CVE-2010-4238 kernel: Xen Dom0 crash with Windows 2008 R2 64bit DomU + GPLPV.
- XenSource Web site: Xen.
- BID-45795: Xen 'vbd_create()' Denial of Service Vulnerability
- CVE-2010-4238: The vbd_create function in Xen 3.1.2, when the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 is used, allows guest OS users to cause a denial of service (host OS panic) via an attempted access to a virtual CD-ROM device through the blkback driver. NOTE: some of these details are obtained from third party information.
- OSVDB ID: 70660: Linux Kernel on RHEL Xen vbd_create Function blkback Driver Virtual CD-ROM Device Access Local DoS
- RHSA-2011-0017: Important: Red Hat Enterprise Linux 5.6 kernel security and bug fix update
- SA46397: VMware ESX / ESXi Server Multiple Vulnerabilities
Platforms Affected:
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client
- XenSource Xen 3.1.2
Reported:
Jan 14, 2011
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The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.