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CVE-2014-7155

UnknownEPSS 0.97%

Last modified

CVE-2014-7155 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.97% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.97%

57.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
XenXen<= 4.4.0
XenXen3.0.2
XenXen3.0.3
XenXen3.0.4
XenXen3.1.3
XenXen3.1.4
XenXen3.2.0
XenXen3.2.1
XenXen3.2.2
XenXen3.2.3
XenXen3.3.0
XenXen3.3.1
XenXen3.3.2
XenXen3.4.0
XenXen3.4.1
XenXen3.4.2
XenXen3.4.3
XenXen3.4.4
XenXen4.0.0
XenXen4.0.1
XenXen4.0.2
XenXen4.0.3
XenXen4.0.4
XenXen4.1.0
XenXen4.1.1
XenXen4.1.2
XenXen4.1.3
XenXen4.1.4
XenXen4.1.5
XenXen4.1.6.1
XenXen4.2.0
XenXen4.2.1
XenXen4.2.2
XenXen4.2.3
XenXen4.3.0
XenXen4.3.1
XenXen4.4.0
DebianDebian Linux7.0
FedoraprojectFedora19
FedoraprojectFedora20
OpensuseOpensuse12.3
OpensuseOpensuse13.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2014-7155?
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.
How severe is CVE-2014-7155?
Severity scoring for CVE-2014-7155 is pending analysis. The EPSS model estimates a 0.97% probability of exploitation in the next 30 days.
How do I fix CVE-2014-7155?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2014-7155?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST