CVE-2010-4255
6.1 · MEDIUMThe 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_l…
Overview
CVE-2010-4255 is a medium-severity vulnerability affecting citrix xen. It was published on January 25, 2011 and has a CVSS 2.0 base score of 6.1 (MEDIUM).
This vulnerability has a CVSS 2.0 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
Technical 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.
Remediation
Check the references section for vendor advisories and patches from citrix. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| citrix | xen | 0 | Affected |
References
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Frequently asked questions
What is CVE-2010-4255?
CVE-2010-4255 is a medium-severity vulnerability affecting citrix xen. It was published on January 25, 2011 and has a CVSS 2.0 base score of 6.1 (MEDIUM).
How severe is CVE-2010-4255?
This vulnerability has a CVSS 2.0 base score of 6.1, rated MEDIUM. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.
How do I fix or remediate CVE-2010-4255?
Check the references section for vendor advisories and patches from citrix. Update xen to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2010-4255?
CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2010-4255 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.
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