CVE-2012-3516

Description

The GNTTABOP_swap_grant_ref sub-operation in the grant table hypercall in Xen 4.2 and Citrix XenServer 6.0.2 allows local guest kernels or administrators to cause a denial of service (host crash) and possibly gain privileges via a crafted grant reference that triggers a write to an arbitrary hypervisor memory location.

Category

6.9
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.08%
Vendor Advisory opensuse.org Vendor Advisory secunia.com Vendor Advisory secunia.com Vendor Advisory citrix.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.securityfocus.com/bid/55411 vdb entry
http://secunia.com/advisories/50530 third party advisory vendor advisory
http://www.openwall.com/lists/oss-security/2012/09/05/11 mailing list
http://secunia.com/advisories/50472 third party advisory vendor advisory
http://support.citrix.com/article/CTX134708 patch vendor advisory
http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html vendor advisory

Frequently Asked Questions

What is the severity of CVE-2012-3516?
CVE-2012-3516 has been scored as a medium severity vulnerability.
How to fix CVE-2012-3516?
To fix CVE-2012-3516, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-3516 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2012-3516 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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