CVE-2016-6259: Input Validation
First published: Tue Aug 02 2016(Updated: )
Xen 4.5.x through 4.7.x do not implement Supervisor Mode Access Prevention (SMAP) whitelisting in 32-bit exception and event delivery, which allows local 32-bit PV guest OS kernels to cause a denial of service (hypervisor and VM crash) by triggering a safety check.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Xen XAPI | =4.5.0 | |
| Xen XAPI | =4.5.1 | |
| Xen XAPI | =4.5.2 | |
| Xen XAPI | =4.5.3 | |
| Xen XAPI | =4.6.0 | |
| Xen XAPI | =4.6.1 | |
| Xen XAPI | =4.6.3 | |
| Xen XAPI | =4.7.0 | |
| XenServer | =6.0 | |
| XenServer | =6.0.2 | |
| XenServer | =6.1 | |
| XenServer | =6.2.0-sp1 | |
| XenServer | =6.5.0-sp1 | |
| XenServer | =7.0 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2016-6259?
CVE-2016-6259 has been classified as a moderate severity vulnerability due to its potential to cause denial of service.
How do I fix CVE-2016-6259?
To fix CVE-2016-6259, you need to upgrade to a patched version of Xen or XenServer that addresses the SMAP whitelisting issue.
What versions of Xen are affected by CVE-2016-6259?
CVE-2016-6259 affects Xen versions 4.5.x through 4.7.x.
Can CVE-2016-6259 be exploited remotely?
No, CVE-2016-6259 requires local access to the 32-bit PV guest OS to exploit the vulnerability.
What impact does CVE-2016-6259 have on systems?
CVE-2016-6259 may lead to a denial of service, causing hypervisor and VM crashes.
- agent/references
- agent/type
- collector/mitre-cve
- source/MITRE
- agent/remedy
- agent/last-modified-date
- agent/weakness
- agent/author
- agent/severity
- agent/event
- agent/description
- agent/first-publish-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/xen
- canonical/xen xapi
- version/xen xapi/4.5.0
- version/xen xapi/4.5.1
- version/xen xapi/4.5.2
- version/xen xapi/4.5.3
- version/xen xapi/4.6.0
- version/xen xapi/4.6.1
- version/xen xapi/4.6.3
- version/xen xapi/4.7.0
- vendor/citrix
- canonical/xenserver
- version/xenserver/6.0
- version/xenserver/6.0.2
- version/xenserver/6.1
- version/xenserver/6.2.0-sp1
- version/xenserver/6.5.0-sp1
- version/xenserver/7.0