CVE-2014-8594: Input Validation
First published: Wed Nov 19 2014(Updated: )
The do_mmu_update function in arch/x86/mm.c in Xen 4.x through 4.4.x does not properly restrict updates to only PV page tables, which allows remote PV guests to cause a denial of service (NULL pointer dereference) by leveraging hardware emulation services for HVM guests using Hardware Assisted Paging (HAP).
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| openSUSE | =13.1 | |
| openSUSE | =13.2 | |
| Debian GNU/Linux | =7.0 | |
| Xen xen-unstable | =4.0.0 | |
| Xen xen-unstable | =4.0.1 | |
| Xen xen-unstable | =4.0.2 | |
| Xen xen-unstable | =4.0.3 | |
| Xen xen-unstable | =4.0.4 | |
| Xen xen-unstable | =4.1.0 | |
| Xen xen-unstable | =4.1.1 | |
| Xen xen-unstable | =4.1.2 | |
| Xen xen-unstable | =4.1.3 | |
| Xen xen-unstable | =4.1.4 | |
| Xen xen-unstable | =4.1.5 | |
| Xen xen-unstable | =4.1.6.1 | |
| Xen xen-unstable | =4.2.0 | |
| Xen xen-unstable | =4.2.1 | |
| Xen xen-unstable | =4.2.2 | |
| Xen xen-unstable | =4.2.3 | |
| Xen xen-unstable | =4.3.0 | |
| Xen xen-unstable | =4.3.1 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00005.html
- http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00010.html
- http://secunia.com/advisories/62672
- http://www.debian.org/security/2015/dsa-3140
- http://www.securityfocus.com/bid/71149
- http://xenbits.xen.org/xsa/advisory-109.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/98767
- https://security.gentoo.org/glsa/201504-04
Frequently Asked Questions
What is the severity of CVE-2014-8594?
CVE-2014-8594 has been classified as a medium severity vulnerability due to its potential to cause denial of service.
How do I fix CVE-2014-8594?
To fix CVE-2014-8594, update to the latest version of Xen or apply any available security patches.
Who is affected by CVE-2014-8594?
CVE-2014-8594 affects users of Xen versions 4.0.0 through 4.4.x, as well as specific distributions including openSUSE and Debian.
What does CVE-2014-8594 exploit?
CVE-2014-8594 exploits improper restrictions in the do_mmu_update function to allow remote PV guests to trigger a NULL pointer dereference.
What type of vulnerability is CVE-2014-8594?
CVE-2014-8594 is a denial of service vulnerability impacting virtualization environments running Xen.
- agent/weakness
- agent/type
- agent/references
- agent/remedy
- agent/severity
- agent/author
- agent/description
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/event
- agent/first-publish-date
- agent/source
- agent/softwarecombine
- agent/tags
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/opensuse
- canonical/opensuse
- version/opensuse/13.1
- version/opensuse/13.2
- vendor/debian
- canonical/debian gnu/linux
- version/debian gnu/linux/7.0
- vendor/xen
- canonical/xen xen-unstable
- version/xen xen-unstable/4.0.0
- version/xen xen-unstable/4.0.1
- version/xen xen-unstable/4.0.2
- version/xen xen-unstable/4.0.3
- version/xen xen-unstable/4.0.4
- version/xen xen-unstable/4.1.0
- version/xen xen-unstable/4.1.1
- version/xen xen-unstable/4.1.2
- version/xen xen-unstable/4.1.3
- version/xen xen-unstable/4.1.4
- version/xen xen-unstable/4.1.5
- version/xen xen-unstable/4.1.6.1
- version/xen xen-unstable/4.2.0
- version/xen xen-unstable/4.2.1
- version/xen xen-unstable/4.2.2
- version/xen xen-unstable/4.2.3
- version/xen xen-unstable/4.3.0
- version/xen xen-unstable/4.3.1