CVE-2010-4255 Denial of service in n/a
Guest OS users can cause a host OS denial of service via crafted memory access in Xen hypervisor when paravirtualization is enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2010-4255?
CVE-2010-4255 is a medium-severity denial of service vulnerability in n/a, published on 25 Jan 2011. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2010-4255?
It affects 1 product.
Products include Citrix Xen.
How do I fix CVE-2010-4255?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2010-4255 being exploited?
There is no known exploitation of CVE-2010-4255 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2010-4255, GHSA-3x4p-cw57-cgf8.