CVE-2010-4255

medium

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.

References

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

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

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

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

http://secunia.com/advisories/46397

http://secunia.com/advisories/42884

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

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

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

Details

Source: Mitre, NVD

Published: 2011-01-25

Risk Information

CVSS v2

Base Score: 6.1

Vector: CVSS2#AV:A/AC:L/Au:N/C:N/I:N/A:C

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H

Severity: Medium