Gentoo Linux Security Advisory 201602-1 - Multiple vulnerabilities have been found in QEMU, the worst of which may allow a remote attacker to cause a Denial of Service or gain elevated privileges from a guest VM. Versions less than 2.5.0-r1 are affected.
cae04eed58ae8cd630be1884c1bb0f33cd229432b115814282bbffc1e4740738Red Hat Security Advisory 2015-1943-01 - KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm package provides the user-space component for running virtual machines using KVM. It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU. This issue was discovered by Daniel P. Berrange of Red Hat.
e5533509473a6a8fde2e5b8dec5e9bd0cc2b48c4f5724d388833ba73b6742d8cRed Hat Security Advisory 2015-1931-01 - KVM is a full virtualization solution for Linux on AMD64 and Intel 64 systems. The qemu-kvm-rhev package provides the user-space component for running virtual machines using KVM. It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU. This issue was discovered by Daniel P. Berrange of Red Hat.
d93ac13fdbf51688970ebeb6f32cac88de3bebc4d39983f98b817cb2247f04c3Ubuntu Security Notice 2608-1 - Jason Geffner discovered that QEMU incorrectly handled the virtual floppy driver. This issue is known as VENOM. A malicious guest could use this issue to cause a denial of service, or possibly execute arbitrary code on the host as the user running the QEMU process. In the default installation, when QEMU is used with libvirt, attackers would be isolated by the libvirt AppArmor profile. Daniel P. Berrange discovered that QEMU incorrectly handled VNC websockets. A remote attacker could use this issue to cause QEMU to consume memory, resulting in a denial of service. This issue only affected Ubuntu 14.04 LTS, Ubuntu 14.10 and Ubuntu 15.04. Various other issues were also addressed.
8016922249d1200857b855be754556a4986b2239c15572207796d8c4f2e6d88fDebian Linux Security Advisory 3259-1 - Several vulnerabilities were discovered in the qemu virtualisation solution.
0023f319a16ece6a882500e80e69ae44288802e335ef47565d8d36f8fc537ea8Mandriva Linux Security Advisory 2015-210 - A denial of service flaw was found in the way QEMU handled malformed Physical Region Descriptor Table data sent to the host's IDE and/or AHCI controller emulation. A privileged guest user could use this flaw to crash the system. It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.
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