Xen PVFB Shared Framebuffer Processing Vulnerability - Secunia Advisories - Vulnerability Intelligence

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Xen PVFB Shared Framebuffer Processing Vulnerability
Secunia Advisory:	SA30781	Advisory Toolbox: Issue ticket Save in to-do list Mark as handled Exploit information Download as PDF Review actions Add comment
Release Date:	2008-06-20
Popularity:	2,266 views

Critical:	Less critical
Impact:	Security Bypass DoS
Where:	Local system
Solution Status:	Vendor Workaround

Software:	Xen 3.x

Subscribe:	Instant alerts on relevant vulnerabilities

CVE reference:	CVE-2008-1943

Description: A vulnerability has been reported in Xen, which can be exploited by malicious, local users to cause a DoS (Denial of Service) or potentially bypass certain security restrictions. The vulnerability is caused due to an error in the PVFB (Para Virtualized Frame Buffer) functionality. This can be exploited to cause a crash or potentially execute arbitrary code in Dom0 via a specially crafted description for the shared framebuffer. The vulnerability is reported in version 3.2.1. Other versions may also be affected. Solution: Fixed in the mercurial repository. http://xenbits.xensource.com/xen-unst...f/53195719f762/tools/ioemu/hw/xenfb.c http://xenbits.xensource.com/xen-unst...f/9044705960cb/tools/ioemu/hw/xenfb.c Provided and/or discovered by: Markus Armbruster, Red Hat Original Advisory: http://xenbits.xensource.com/xen-unstable.hg?rev/53195719f762 https://bugzilla.redhat.com/show_bug.cgi?id=443078

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