CVE-2012-3496 Denial of service in n/a
A local guest kernel can crash the Xen host by triggering a BUG via invalid flags when translating paging mode is disabled.
- 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-2012-3496?
CVE-2012-3496 is a medium-severity denial of service vulnerability in Citrix Xenserver, published on 23 Nov 2012. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
XENMEM_populate_physmap in Xen 4.0, 4.1, and 4.2, and Citrix XenServer 6.0.2 and earlier, when translating paging mode is not used, allows local PV OS guest kernels to cause a denial of service (BUG triggered and host crash) via invalid flags such as MEMF_populate_on_demand.
Weakness: CWE-16
Which versions are affected by CVE-2012-3496?
It affects 2 products.
Products include Citrix Xenserver, Xen Xen.
How do I fix CVE-2012-3496?
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-2012-3496 being exploited?
There is no known exploitation of CVE-2012-3496 in the wild and no public exploit code.
Other vulnerabilities in Citrix Xenserver
Sources
Also known as DEBIAN-CVE-2012-3496, GHSA-gw25-hcr4-7p5h.