CVE-2012-3495: Input Validation
First published: Fri Nov 23 2012(Updated: )
The physdev_get_free_pirq hypercall in arch/x86/physdev.c in Xen 4.1.x and Citrix XenServer 6.0.2 and earlier uses the return value of the get_free_pirq function as an array index without checking that the return value indicates an error, which allows guest OS users to cause a denial of service (invalid memory write and host crash) and possibly gain privileges via unspecified vectors.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| XenServer | <=6.0.2 | |
| XenServer | =5.0 | |
| XenServer | =5.5 | |
| XenServer | =5.6 | |
| XenServer | =5.6-fp1 | |
| XenServer | =5.6-sp2 | |
| XenServer | =6.0 | |
| Xen xen-unstable | =4.1.0 | |
| Xen xen-unstable | =4.1.1 | |
| Xen xen-unstable | =4.1.2 | |
| Xen xen-unstable | =4.1.3 |
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Reference Links
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00003.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00017.html
- http://lists.opensuse.org/opensuse-security-announce/2012-11/msg00018.html
- http://lists.xen.org/archives/html/xen-announce/2012-09/msg00001.html
- http://secunia.com/advisories/51413
- http://secunia.com/advisories/55082
- http://security.gentoo.org/glsa/glsa-201309-24.xml
- http://support.citrix.com/article/CTX134708
- http://wiki.xen.org/wiki/Security_Announcements#XSA-13_hypercall_physdev_get_free_pirq_vulnerability
- http://www.openwall.com/lists/oss-security/2012/09/05/6
- http://www.securityfocus.com/bid/55406
- http://www.securitytracker.com/id?1027480
- http://xenbits.xen.org/hg/xen-4.1-testing.hg/rev/6779ddca8593
- https://security.gentoo.org/glsa/201604-03
- agent/references
- agent/type
- agent/last-modified-date
- agent/first-publish-date
- agent/severity
- agent/weakness
- agent/author
- agent/description
- agent/event
- agent/tags
- agent/softwarecombine
- collector/nvd-index
- agent/software-canonical-lookup-request
- vendor/citrix
- canonical/xenserver
- version/xenserver/6.0.2
- version/xenserver/5.0
- version/xenserver/5.5
- version/xenserver/5.6
- version/xenserver/5.6-fp1
- version/xenserver/5.6-sp2
- version/xenserver/6.0
- vendor/xen
- canonical/xen xen-unstable
- 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