CVE-2014-7155

Publication date 2 October 2014

Last updated 24 July 2024

Ubuntu priority

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.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
xen	15.04 vivid	Fixed 4.4.1-3ubuntu1
	14.10 utopic	Fixed 4.4.0-0ubuntu8
	14.04 LTS trusty	Fixed 4.4.0-0ubuntu5.2
	12.04 LTS precise	Fixed 4.1.6.1-0ubuntu0.12.04.3
	10.04 LTS lucid	Not in release
xen-3.3	15.04 vivid	Not in release
	14.10 utopic	Not in release
	14.04 LTS trusty	Not in release
	12.04 LTS precise	Not in release
	10.04 LTS lucid	Ignored end of life

How can I get the fixes?
What do statuses mean?

Notes

mdeslaur

3.2.x+

References

MITRE
NVD
Launchpad
Debian

Other references

http://xenbits.xen.org/xsa/advisory-105.html
https://www.cve.org/CVERecord?id=CVE-2014-7155