National Cyber Awareness System

Vulnerability Summary for CVE-2010-4255

Overview

The fixup_page_fault function in arch/x86/traps.c in Xen 4.0.1 and earlier on 64-bit platforms, when paravirtualization is enabled, does not verify that kernel mode is used to call the handle_gdt_ldt_mapping_fault function, which allows guest OS users to cause a denial of service (host OS BUG_ON) via a crafted memory access.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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External Source: CONFIRM

Name: https://bugzilla.redhat.com/show_bug.cgi?id=658155

Type: Patch Information

Hyperlink:https://bugzilla.redhat.com/show_bug.cgi?id=658155

External Source: MLIST

Name: [oss-security] 20101130 Re: CVE request: xen: x86-64: don't crash Xen upon direct pv guest access

Type: Patch Information

Hyperlink:http://openwall.com/lists/oss-security/2010/11/30/8

External Source: MLIST

Name: [oss-security] 20101130 CVE request: xen: x86-64: don't crash Xen upon direct pv guest access

Type: Patch Information

Hyperlink:http://openwall.com/lists/oss-security/2010/11/30/5

External Source: MLIST

Name: [xen-devel] 20101129 [PATCH] x86-64: don't crash Xen upon direct pv guest access

Type: Patch Information

Hyperlink:http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html

External Source: CONFIRM

Name: http://www.vmware.com/security/advisories/VMSA-2011-0012.html

Hyperlink:http://www.vmware.com/security/advisories/VMSA-2011-0012.html

External Source: BUGTRAQ

Name: 20111013 VMSA-2011-0012 VMware ESXi and ESX updates to third party libraries and ESX Service Console

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/520102/100/0/threaded

External Source: REDHAT

Name: RHSA-2011:0017

Hyperlink:http://www.redhat.com/support/errata/RHSA-2011-0017.html

External Source: SECUNIA

Name: 46397

Hyperlink:http://secunia.com/advisories/46397

External Source: SECUNIA

Name: 42884

Hyperlink:http://secunia.com/advisories/42884