Xen flask_security_label function buffer overflow
| xen-flasksecuritylabel-bo (44608) |  High Risk |
Description:
Xen is vulnerable to a heap-based buffer overflow, caused by improper bounds checking by the security_label function when compiled with the XSM:FLASK module. A remote attacker could exploit this vulnerability using the flask_op hypercall to overflow a buffer and execute arbitrary code on the system with elevated privileges or cause the application to crash.
*CVSS:
| Base Score: | 7.5 |
| Access Vector: | Network |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Partial |
| Integrity Impact: | Partial |
| Availability Impact: | Partial |
| Temporal Score: | 5.5 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Gain Access
Remedy:
Refer to xen changeset fa66b33f975a for patch, upgrade or suggested workaround information. See References.
References:
- xen changeset fa66b33f975a: changeset: [XSM][FLASK] Argument handling bugs in XSM:FLASK.
- Xen Web site: What is Xen?.
- Xen-Dev Mailing List, Jul 18, 2008; 03:12pm: Argument handling bugs in XSM:FLASK.
- BID-30834: Xen 'XSM:Flask' Module Multiple Local Buffer Overflow Vulnerabilities
- CVE-2008-3687: Heap-based buffer overflow in the flask_security_label function in Xen 3.3, when compiled with the XSM:FLASK module, allows unprivileged domain users (domU) to execute arbitrary code via the flask_op hypercall.
- SA31561: Xen "flask_op" Buffer Overflow Vulnerability
- SECTRACK ID: 1020731: Xen Buffer Overflow in XSM:Flask flask_op() May Let Local Users Gain Elevated Privileges
- VUPEN/ADV-2008-2426: Xen flask_op Hypercall Local Buffer Overflow Vulnerability
Platforms Affected:
- XenSource Xen 3.3.0
Reported:
Jul 18, 2008
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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.