CVE-2010-4255
5.5 Medium
AI Score
Confidence
High
6.1 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:L/Au:N/C:N/I:N/A:C
0.002 Low
EPSS
Percentile
57.9%
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
lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html
openwall.com/lists/oss-security/2010/11/30/5
openwall.com/lists/oss-security/2010/11/30/8
secunia.com/advisories/42884
secunia.com/advisories/46397
www.redhat.com/support/errata/RHSA-2011-0017.html
www.securityfocus.com/archive/1/520102/100/0/threaded
www.vmware.com/security/advisories/VMSA-2011-0012.html
bugzilla.redhat.com/show_bug.cgi?id=658155
Related
5.5 Medium
AI Score
Confidence
High
6.1 Medium
CVSS2
Access Vector
ADJACENT_NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
AV:A/AC:L/Au:N/C:N/I:N/A:C
0.002 Low
EPSS
Percentile
57.9%