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CVE-2010-4255

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Date: January 24, 2011

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.

Language: C

Severity Score

Related Resources (12)

https://bugzilla.redhat.com/show_bug.cgi?id=658155
https://nvd.nist.gov/vuln/detail/CVE-2010-4255
http://secunia.com/advisories/46397
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://openwall.com/lists/oss-security/2010/11/30/5
http://openwall.com/lists/oss-security/2010/11/30/8
https://access.redhat.com/security/cve/CVE-2010-4255
http://secunia.com/advisories/42884
http://lists.xensource.com/archives/html/xen-devel/2010-11/msg01650.html
https://www.mend.io/vulnerability-database/CVE-2010-4255

Severity Score

CVSS v3.1

Base Score:
Attack Vector (AV): ADJACENT_NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): ADJACENT
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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