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CVE-2011-2512

Status Candidate

Overview

The virtio_queue_notify in qemu-kvm 0.14.0 and earlier does not properly validate the virtqueue number, which allows guest users to cause a denial of service (guest crash) and possibly execute arbitrary code via a negative number in the Queue Notify field of the Virtio Header, which bypasses a signed comparison.

Related Files

Gentoo Linux Security Advisory 201210-04
Posted Oct 18, 2012
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201210-4 - Multiple vulnerabilities were found in qemu-kvm, allowing attackers to execute arbitrary code. Versions less than 1.1.1-r1 are affected.

tags | advisory, arbitrary, vulnerability
systems | linux, gentoo
advisories | CVE-2011-1750, CVE-2011-1751, CVE-2011-2212, CVE-2011-2512, CVE-2012-0029, CVE-2012-2652
SHA-256 | 06a3dcc607829516f85c54a5f5e6c417bc1c799c5779cfc55ea88d07821757e1
Ubuntu Security Notice USN-1165-1
Posted Jul 7, 2011
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 1165-1 - Nelson Elhage discovered that QEMU did not properly validate certain virtqueue requests from the guest. An attacker could exploit this to cause a denial of service of the guest or possibly execute code with the privileges of the user invoking the program. Stefan Hajnoczi discovered that QEMU did not properly perform integer comparisons when performing virtqueue input validation. An attacker could exploit this to cause a denial of service of the guest or possibly execute code with the privileges of the user invoking the program. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2011-2212, CVE-2011-2512
SHA-256 | e3ccd0d1153d4140f17f1e1ce0c2c4ba9f29570da645f067a3ba6f3b39a4acaa
Red Hat Security Advisory 2011-0919-01
Posted Jul 5, 2011
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2011-0919-01 - KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. qemu-kvm is the user-space component for running virtual machines using KVM. It was found that the virtio subsystem in qemu-kvm did not properly validate virtqueue in and out requests from the guest. A privileged guest user could use this flaw to trigger a buffer overflow, allowing them to crash the guest or, possibly, escalate their privileges on the host. It was found that the virtio_queue_notify() function in qemu-kvm did not perform sufficient input validation on the value later used as an index into the array of virtqueues. An unprivileged guest user could use this flaw to crash the guest or, possibly, escalate their privileges on the host. Various other issues were also addressed.

tags | advisory, overflow
systems | linux, redhat
advisories | CVE-2011-2212, CVE-2011-2512
SHA-256 | 618f288e12fbda5483a5747741cf28e456411a05c89f0f05dca002132c56c20b
Debian Security Advisory 2270-1
Posted Jul 1, 2011
Authored by Debian | Site debian.org

Debian Linux Security Advisory 2270-1 - It was discovered that incorrect sanitising of virtio queue commands in KVM, a solution for full virtualization on x86 hardware, could lead to denial of service of the execution of arbitrary code.

tags | advisory, denial of service, arbitrary, x86
systems | linux, debian
advisories | CVE-2011-2512
SHA-256 | 802e2cb84ab1889489e86adbd8819bfe197e3899c94bfbb8dc0db40b933c5069
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