Xen para-virtualized framebuffer (PVFB) message denial of service
| xen-pvfb-message-dos (42388) |  High Risk |
Description:
Xen is vulnerable to a buffer overflow, caused by improper bounds checking by the hypervisor's para-virtualized framebuffer (PVFB). A local attacker could exploit this vulnerability using a malformed frontend framebuffer description to crash the application or execute arbitrary code in the privileged domain (Dom0).
Platforms Affected:
- RedHat, Enterprise Linux 5 Server
- RedHat, Enterprise Linux 5 Client
- RedHat, Enterprise Linux 5
- RedHat, RHEL Desktop Multi OS 5 Client
- RedHat, RHEL Virtualization 5 Server
- XenSource, Xen 3.0
- XenSource, Xen 3.0.3
Remedy:
Refer to RHSA-2008-0194 for patch, upgrade or suggested workaround information. See References.
Consequences:
Gain Privileges
References:
- Xen Web site, Xen Community at http://xen.xensource.com/.
- BID-29186: Xen Para-Virtualized Framebuffer Message Format Denial Of Service Vulnerability
- CVE-2008-1944: Buffer overflow in the backend framebuffer of XenSource Xen Para-Virtualized Framebuffer (PVFB) Message 3.0 through 3.0.3 allows local users to cause a denial of service (SDL crash) and possibly execute arbitrary code via bogus screen updates
- RHSA-2008-0194: Important: xen security and bug fix update
- SECTRACK ID: 1020009: Xen PVFB Format Validation Bug Lets Local Users Deny Service or Gain Elevated Privileges
Reported:
May 13, 2008
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