Access Restriction Bypass Affecting qemu package, versions <2.0.0+dfsg-2ubuntu1.11
Threat Intelligence
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk ID SNYK-UBUNTU1404-QEMU-427949
- published 1 Apr 2015
- disclosed 1 Apr 2015
Introduced: 1 Apr 2015
CVE-2015-2756 Open this link in a new tabHow to fix?
Upgrade Ubuntu:14.04 qemu to version 2.0.0+dfsg-2ubuntu1.11 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Ubuntu.
See How to fix? for Ubuntu:14.04 relevant fixed versions and status.
QEMU, as used in Xen 3.3.x through 4.5.x, does not properly restrict access to PCI command registers, which might allow local HVM guest users to cause a denial of service (non-maskable interrupt and host crash) by disabling the (1) memory or (2) I/O decoding for a PCI Express device and then accessing the device, which triggers an Unsupported Request (UR) response.
References
- http://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-2756
- https://support.citrix.com/article/CTX206006
- http://support.citrix.com/article/CTX201145
- http://xenbits.xen.org/xsa/advisory-126.html
- http://www.debian.org/security/2015/dsa-3259
- https://security-tracker.debian.org/tracker/CVE-2015-2756
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154574.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/154579.html
- http://lists.fedoraproject.org/pipermail/package-announce/2015-April/155198.html
- https://security.gentoo.org/glsa/201504-04
- http://lists.nongnu.org/archive/html/qemu-devel/2015-03/msg06179.html
- http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00014.html
- http://www.securityfocus.com/bid/72577
- http://www.securitytracker.com/id/1031998
- http://www.ubuntu.com/usn/USN-2608-1