CVE-2014-7155

Description

The x86_emulate function in arch/x86/x86_emulate/x86_emulate.c in Xen 4.4.x and earlier does not properly check supervisor mode permissions, which allows local HVM users to cause a denial of service (guest crash) or gain guest kernel mode privileges via vectors involving an (1) HLT, (2) LGDT, (3) LIDT, or (4) LMSW instruction.

Category

5.8
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 0.78% Top 30%
Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory xen.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00003.html third party advisory vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140483.html third party advisory vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2014-10/msg00002.html third party advisory vendor advisory
http://xenbits.xen.org/xsa/advisory-105.html patch vendor advisory
http://support.citrix.com/article/CTX200218 third party advisory
http://www.securitytracker.com/id/1030888 vdb entry third party advisory
http://lists.fedoraproject.org/pipermail/package-announce/2014-October/140418.html third party advisory vendor advisory
http://www.debian.org/security/2014/dsa-3041 third party advisory vendor advisory
http://secunia.com/advisories/61858 third party advisory
http://secunia.com/advisories/61890 third party advisory
http://security.gentoo.org/glsa/glsa-201412-42.xml vendor advisory
http://www.securityfocus.com/bid/70057 vdb entry third party advisory

Frequently Asked Questions

What is the severity of CVE-2014-7155?
CVE-2014-7155 has been scored as a medium severity vulnerability.
How to fix CVE-2014-7155?
To fix CVE-2014-7155, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2014-7155 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2014-7155 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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