Access Restriction Bypass Affecting qemu package, versions <1:2.3+dfsg-3
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Test your applications- Snyk ID SNYK-DEBIAN12-QEMU-1558221
- 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 Debian:12
qemu
to version 1:2.3+dfsg-3 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 Debian
.
See How to fix?
for Debian:12
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
- https://security-tracker.debian.org/tracker/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
- 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://people.ubuntu.com/~ubuntu-security/cve/CVE-2015-2756
- http://www.ubuntu.com/usn/USN-2608-1