CVE-2016-6258
Description
The PV pagetable code in arch/x86/mm.c in Xen 4.7.x and earlier allows local 32-bit PV guest OS administrators to gain host OS privileges by leveraging fast-paths for updating pagetable entries.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2016-6258
Vendor advisory: cve@mitre.org — http://xenbits.xen.org/xsa/xsa182-unstable.patch
Vendor advisory: cve@mitre.org — http://xenbits.xen.org/xsa/xsa182-4.6.patch
Vendor advisory: cve@mitre.org — http://xenbits.xen.org/xsa/xsa182-4.5.patch
Vendor advisory: cve@mitre.org — http://xenbits.xen.org/xsa/advisory-182.html
Vendor advisory: cve@mitre.org — http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
Vendor advisory: cve@mitre.org — http://support.citrix.com/article/CTX214954
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| debian | bookworm | fixed | 4.8.0~rc3-1 |
| debian | bullseye | fixed | 4.8.0~rc3-1 |
| debian | forky | fixed | 4.8.0~rc3-1 |
| debian | sid | fixed | 4.8.0~rc3-1 |
| debian | trixie | fixed | 4.8.0~rc3-1 |
References
- http://support.citrix.com/article/CTX214954
- http://www.debian.org/security/2016/dsa-3633
- http://www.oracle.com/technetwork/topics/security/ovmbulletinjul2016-3090546.html
- http://www.securityfocus.com/bid/92131
- http://www.securitytracker.com/id/1036446
- http://xenbits.xen.org/xsa/advisory-182.html
- http://xenbits.xen.org/xsa/xsa182-4.5.patch
- http://xenbits.xen.org/xsa/xsa182-4.6.patch
- http://xenbits.xen.org/xsa/xsa182-unstable.patch
- https://security.gentoo.org/glsa/201611-09
- https://security-tracker.debian.org/tracker/CVE-2016-6258
CWEs
CWE-284
Verify integrity in audit chain (admin only). AS-IS.