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CVE-2016-6888

Status Candidate

Overview

Integer overflow in the net_tx_pkt_init function in hw/net/net_tx_pkt.c in QEMU (aka Quick Emulator) allows local guest OS administrators to cause a denial of service (QEMU process crash) via the maximum fragmentation count, which triggers an unchecked multiplication and NULL pointer dereference.

Related Files

Red Hat Security Advisory 2017-2408-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2408-01 - KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. Security Fix: Quick Emulator built with Network Block Device Server support was vulnerable to a null-pointer dereference issue. The flaw could occur when releasing a client that was not initialized due to failed negotiation. A remote user or process could exploit this flaw to crash the qemu-nbd server.

tags | advisory, remote
systems | linux, redhat
advisories | CVE-2016-10155, CVE-2016-4020, CVE-2016-6888, CVE-2016-7422, CVE-2016-7466, CVE-2016-8576, CVE-2016-8669, CVE-2016-8909, CVE-2016-8910, CVE-2016-9907, CVE-2016-9911, CVE-2016-9921, CVE-2016-9922, CVE-2017-5579, CVE-2017-5973, CVE-2017-6414, CVE-2017-8309, CVE-2017-8379, CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375, CVE-2017-9524
SHA-256 | 20c3d56cf43f3ca77bafe54885bbe8c3f543e06a0222599d837e53d50155a00d
Red Hat Security Advisory 2017-2392-01
Posted Aug 2, 2017
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2017-2392-01 - KVM is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. The following packages have been upgraded to a later upstream version: qemu-kvm-rhev. Security Fix: A stack buffer overflow flaw was found in the Quick Emulator built with the Network Block Device client support. The flaw could occur while processing server's response to a 'NBD_OPT_LIST' request. A malicious NBD server could use this issue to crash a remote NBD client resulting in DoS or potentially execute arbitrary code on client host with privileges of the QEMU process.

tags | advisory, remote, overflow, arbitrary
systems | linux, redhat
advisories | CVE-2016-10155, CVE-2016-4020, CVE-2016-6835, CVE-2016-6888, CVE-2016-7422, CVE-2016-7466, CVE-2016-8576, CVE-2016-8669, CVE-2016-8909, CVE-2016-8910, CVE-2016-9907, CVE-2016-9911, CVE-2016-9921, CVE-2016-9922, CVE-2017-2630, CVE-2017-5579, CVE-2017-5898, CVE-2017-5973, CVE-2017-9310, CVE-2017-9373, CVE-2017-9374, CVE-2017-9375
SHA-256 | 8bdef9a2edaa6c48acb02022865e43e9a79db08204a6fbb3afa3dc39b0a5c36a
Ubuntu Security Notice USN-3125-1
Posted Nov 10, 2016
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 3125-1 - Zhenhao Hong discovered that QEMU incorrectly handled the Virtio module. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources, resulting in a denial of service. Li Qiang discovered that QEMU incorrectly handled VMWARE VMXNET3 network card emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 16.04 LTS and Ubuntu 16.10. Various other issues were also addressed.

tags | advisory, denial of service
systems | linux, ubuntu
advisories | CVE-2016-5403, CVE-2016-6833, CVE-2016-6834, CVE-2016-6835, CVE-2016-6836, CVE-2016-6888, CVE-2016-7116, CVE-2016-7155, CVE-2016-7156, CVE-2016-7157, CVE-2016-7161, CVE-2016-7170, CVE-2016-7421, CVE-2016-7422, CVE-2016-7423, CVE-2016-7466, CVE-2016-7908, CVE-2016-7909, CVE-2016-7994, CVE-2016-7995, CVE-2016-8576, CVE-2016-8577, CVE-2016-8578, CVE-2016-8668, CVE-2016-8909, CVE-2016-8910, CVE-2016-9101, CVE-2016-9102
SHA-256 | ebbb9dd99d4d4747c3700c5ee2ba26996c0c622e1a49ae4a8d2ca5b4b29fb07d
Gentoo Linux Security Advisory 201609-01
Posted Sep 26, 2016
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201609-1 - Multiple vulnerabilities have been found in QEMU, the worst of which could lead to arbitrary code execution, or cause a Denial of Service condition. Versions less than 2.7.0-r2 are affected.

tags | advisory, denial of service, arbitrary, vulnerability, code execution
systems | linux, gentoo
advisories | CVE-2016-2841, CVE-2016-4001, CVE-2016-4002, CVE-2016-4020, CVE-2016-4439, CVE-2016-4441, CVE-2016-4453, CVE-2016-4454, CVE-2016-4964, CVE-2016-5106, CVE-2016-5107, CVE-2016-5126, CVE-2016-5238, CVE-2016-5337, CVE-2016-5338, CVE-2016-6490, CVE-2016-6833, CVE-2016-6834, CVE-2016-6836, CVE-2016-6888, CVE-2016-7116, CVE-2016-7156, CVE-2016-7157, CVE-2016-7422
SHA-256 | b8f2f8b58b5e089ef9db3161d7a00541378147b42a93c4728c7909df11bd7c0d
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