Instituto Nacional de ciberseguridad. Sección Incibe
Instituto Nacional de Ciberseguridad. Sección INCIBE-CERT

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CVE-2010-4255

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/01/2011
Last modified:
11/04/2025

Description

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

Vector 2.0
AV:A/AC:L/Au:N/C:N/I:N/A:C CVSS v2.0 Severity and Metrics:

Base Score: 6.10 MEDIUM
Vector: AV:A/AC:L/Au:N/C:N/I:N/A:C

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Authentication (Au): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete

Base Score 2.0
6.10
Severity 2.0
MEDIUM

Vulnerable products and versions

CPE From Up to
cpe:2.3:a:citrix:xen:*:*:*:*:*:*:*:* 4.0.1 (including)
cpe:2.3:a:citrix:xen:3.0.2:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.0.3:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.0.4:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.1.2:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.1.3:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.1.4:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.2.0:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.2.1:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.2.2:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.2.3:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.3.0:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.3.1:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.3.2:*:*:*:*:*:*:*
cpe:2.3:a:citrix:xen:3.4.0:*:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools