CVE-2012-3516
First published: Fri Nov 23 2012(Updated: )
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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| XenServer | <=6.0.2 | |
| Xen XAPI | =4.2.0 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://secunia.com/advisories/50472
- http://secunia.com/advisories/50530
- http://support.citrix.com/article/CTX134708
- http://wiki.xen.org/wiki/Security_Announcements#XSA-18_grant_table_entry_swaps_have_inadequate_bounds_checking
- http://www.openwall.com/lists/oss-security/2012/09/05/11
- http://www.securityfocus.com/bid/55411
Frequently Asked Questions
What is the severity of CVE-2012-3516?
CVE-2012-3516 has a high severity level due to its potential to cause a denial of service and privilege escalation.
How do I fix CVE-2012-3516?
To fix CVE-2012-3516, upgrade to a patched version of Xen or Citrix XenServer that addresses this vulnerability.
Who is affected by CVE-2012-3516?
CVE-2012-3516 affects local guest kernels or administrators using Xen 4.2 and Citrix XenServer versions up to and including 6.0.2.
What type of vulnerability is CVE-2012-3516?
CVE-2012-3516 is a denial of service vulnerability that may also allow privilege escalation.
Can CVE-2012-3516 be exploited remotely?
CVE-2012-3516 requires local access to exploit, so it cannot be exploited remotely.
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- agent/software-canonical-lookup-request
- vendor/citrix
- canonical/xenserver
- version/xenserver/6.0.2
- vendor/xen
- canonical/xen xapi
- version/xen xapi/4.2.0