=========================================================================== Ubuntu Security Notice USN-3414-2 September 20, 2017 qemu regression =========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 17.04 - Ubuntu 16.04 LTS - Ubuntu 14.04 LTS Summary: USN-3414-1 introduced a regression in QEMU. Software Description: - qemu: Machine emulator and virtualizer Details: USN-3414-1 fixed vulnerabilities in QEMU. The patch backport for CVE-2017-9375 was incomplete and caused a regression in the USB xHCI controller emulation support. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Leo Gaspard discovered that QEMU incorrectly handled VirtFS access control. A guest attacker could use this issue to elevate privileges inside the guest. (CVE-2017-7493) Li Qiang discovered that QEMU incorrectly handled VMWare PVSCSI emulation. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources or crash, resulting in a denial of service. (CVE-2017-8112) It was discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host Bus Adapter emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service, or possibly to obtain sensitive host memory. This issue only affected Ubuntu 16.04 LTS and Ubuntu 17.04. (CVE-2017-8380) Li Qiang discovered that QEMU incorrectly handled the Virtio GPU device. An attacker inside the guest could use this issue to cause QEMU to consume resources and crash, resulting in a denial of service. This issue only affected Ubuntu 17.04. (CVE-2017-9060) Li Qiang discovered that QEMU incorrectly handled the e1000e device. A privileged attacker inside the guest could use this issue to cause QEMU to hang, resulting in a denial of service. This issue only affected Ubuntu 17.04. (CVE-2017-9310) Li Qiang discovered that QEMU incorrectly handled USB OHCI emulation support. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2017-9330) Li Qiang discovered that QEMU incorrectly handled IDE AHCI emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources and crash, resulting in a denial of service. (CVE-2017-9373) Li Qiang discovered that QEMU incorrectly handled USB EHCI emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to consume resources and crash, resulting in a denial of service. (CVE-2017-9374) Li Qiang discovered that QEMU incorrectly handled USB xHCI emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to hang, resulting in a denial of service. (CVE-2017-9375) Zhangyanyu discovered that QEMU incorrectly handled MegaRAID SAS 8708EM2 Host Bus Adapter emulation support. A privileged attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2017-9503) It was discovered that the QEMU qemu-nbd server incorrectly handled initialization. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service. (CVE-2017-9524) It was discovered that the QEMU qemu-nbd server incorrectly handled signals. A remote attacker could use this issue to cause the server to crash, resulting in a denial of service. (CVE-2017-10664) Li Qiang discovered that the QEMU USB redirector incorrectly handled logging debug messages. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2017-10806) Anthony Perard discovered that QEMU incorrectly handled Xen block-interface responses. An attacker inside the guest could use this issue to cause QEMU to leak contents of host memory. (CVE-2017-10911) Reno Robert discovered that QEMU incorrectly handled certain DHCP options strings. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. (CVE-2017-11434) Ryan Salsamendi discovered that QEMU incorrectly handled empty CDROM device drives. 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 16.04 LTS and Ubuntu 17.04. (CVE-2017-12809) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 17.04: qemu-system 1:2.8+dfsg-3ubuntu2.5 qemu-system-aarch64 1:2.8+dfsg-3ubuntu2.5 qemu-system-arm 1:2.8+dfsg-3ubuntu2.5 qemu-system-mips 1:2.8+dfsg-3ubuntu2.5 qemu-system-misc 1:2.8+dfsg-3ubuntu2.5 qemu-system-ppc 1:2.8+dfsg-3ubuntu2.5 qemu-system-s390x 1:2.8+dfsg-3ubuntu2.5 qemu-system-sparc 1:2.8+dfsg-3ubuntu2.5 qemu-system-x86 1:2.8+dfsg-3ubuntu2.5 Ubuntu 16.04 LTS: qemu-system 1:2.5+dfsg-5ubuntu10.16 qemu-system-aarch64 1:2.5+dfsg-5ubuntu10.16 qemu-system-arm 1:2.5+dfsg-5ubuntu10.16 qemu-system-mips 1:2.5+dfsg-5ubuntu10.16 qemu-system-misc 1:2.5+dfsg-5ubuntu10.16 qemu-system-ppc 1:2.5+dfsg-5ubuntu10.16 qemu-system-s390x 1:2.5+dfsg-5ubuntu10.16 qemu-system-sparc 1:2.5+dfsg-5ubuntu10.16 qemu-system-x86 1:2.5+dfsg-5ubuntu10.16 Ubuntu 14.04 LTS: qemu-system 2.0.0+dfsg-2ubuntu1.36 qemu-system-aarch64 2.0.0+dfsg-2ubuntu1.36 qemu-system-arm 2.0.0+dfsg-2ubuntu1.36 qemu-system-mips 2.0.0+dfsg-2ubuntu1.36 qemu-system-misc 2.0.0+dfsg-2ubuntu1.36 qemu-system-ppc 2.0.0+dfsg-2ubuntu1.36 qemu-system-sparc 2.0.0+dfsg-2ubuntu1.36 qemu-system-x86 2.0.0+dfsg-2ubuntu1.36 After a standard system update you need to restart all QEMU virtual machines to make all the necessary changes. References: https://www.ubuntu.com/usn/usn-3414-2 https://www.ubuntu.com/usn/usn-3414-1 https://launchpad.net/bugs/1718222 Package Information: https://launchpad.net/ubuntu/+source/qemu/1:2.8+dfsg-3ubuntu2.5 https://launchpad.net/ubuntu/+source/qemu/1:2.5+dfsg-5ubuntu10.16 https://launchpad.net/ubuntu/+source/qemu/2.0.0+dfsg-2ubuntu1.36 --8b4JDSfM6LcMQTAAjFUPPwRS8NlA5ar3I--