Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Citrix | Xenserver | <= 6.0.2 |
| Xen | Xen | 4.2.0 |
Related Weaknesses (CWE)
References
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://secunia.com/advisories/50472Vendor Advisory
- http://secunia.com/advisories/50530Vendor Advisory
- http://support.citrix.com/article/CTX134708PatchVendor Advisory
- http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_h
- http://www.openwall.com/lists/oss-security/2012/09/05/11
- http://www.securityfocus.com/bid/55411
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://secunia.com/advisories/50472Vendor Advisory
- http://secunia.com/advisories/50530Vendor Advisory
- http://support.citrix.com/article/CTX134708PatchVendor Advisory
- http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_h
- http://www.openwall.com/lists/oss-security/2012/09/05/11
- http://www.securityfocus.com/bid/55411
FAQ
What is CVE-2012-3516?
CVE-2012-3516 is a vulnerability with a CVSS score of 6.9 (MEDIUM). 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 ...
How severe is CVE-2012-3516?
CVE-2012-3516 has been rated MEDIUM with a CVSS base score of 6.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2012-3516?
Check the references section above for vendor advisories and patch information. Affected products include: Citrix Xenserver, Xen Xen.