Vulnerability Description
The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted superpage mapping.
CVSS Score
7.2
HIGH
AV:L/AC:L/Au:N/C:C/I:C/A:C
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Xen | Xen | 3.4.0 |
Related Weaknesses (CWE)
References
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.h
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.h
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.h
- http://lists.opensuse.org/opensuse-updates/2015-11/msg00063.html
- http://lists.opensuse.org/opensuse-updates/2015-12/msg00053.html
- http://support.citrix.com/article/CTX202404
- http://www.debian.org/security/2015/dsa-3390
- http://www.securityfocus.com/bid/77366
- http://www.securitytracker.com/id/1034032
- http://xenbits.xen.org/xsa/advisory-148.htmlVendor Advisory
- https://github.com/QubesOS/qubes-secpack/blob/master/QSBs/qsb-022-2015.txtVendor Advisory
- https://security.gentoo.org/glsa/201604-03
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171082.h
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171185.h
- http://lists.fedoraproject.org/pipermail/package-announce/2015-November/171249.h
FAQ
What is CVE-2015-7835?
CVE-2015-7835 is a vulnerability with a CVSS score of 7.2 (HIGH). The mod_l2_entry function in arch/x86/mm.c in Xen 3.4 through 4.6.x does not properly validate level 2 page table entries, which allows local PV guest administrators to gain privileges via a crafted s...
How severe is CVE-2015-7835?
CVE-2015-7835 has been rated HIGH with a CVSS base score of 7.2/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2015-7835?
Check the references section above for vendor advisories and patch information. Affected products include: Xen Xen.