news 28 Posted October 30, 2016 Package : qemu-kvm Version : 1.1.2+dfsg-6+deb7u18 CVE ID : CVE-2016-7909 CVE-2016-8909 CVE-2016-8910 Debian Bug : 839834 841950 841955 842455 842463 Multiple vulnerabilities have been discovered in qemu-kvm, a full virtualization solution on x86 hardware based on Quick Emulator(Qemu). The Common Vulnerabilities and Exposures project identifies the following problems: CVE-2016-7909 Quick Emulator(Qemu) built with the AMD PC-Net II emulator support is vulnerable to an infinite loop issue. It could occur while receiving packets via pcnet_receive(). A privileged user/process inside guest could use this issue to crash the Qemu process on the host leading to DoS. CVE-2016-8909 Quick Emulator(Qemu) built with the Intel HDA controller emulation support is vulnerable to an infinite loop issue. It could occur while processing the DMA buffer stream while doing data transfer in 'intel_hda_xfer'. A privileged user inside guest could use this flaw to consume excessive CPU cycles on the host, resulting in DoS. CVE-2016-8910 Quick Emulator(Qemu) built with the RTL8139 ethernet controller emulation support is vulnerable to an infinite loop issue. It could occur while transmitting packets in C+ mode of operation. A privileged user inside guest could use this flaw to consume excessive CPU cycles on the host, resulting in DoS situation. Further issues fixed where the CVE requests are pending: * Quick Emulator(Qemu) built with the i8255x (PRO100) NIC emulation support is vulnerable to a memory leakage issue. It could occur while unplugging the device, and doing so repeatedly would result in leaking host memory affecting, other services on the host. A privileged user inside guest could use this flaw to cause a DoS on the host and/or potentially crash the Qemu process on the host. * Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to a several memory leakage issues. A privileged user inside guest could use this flaw to leak the host memory bytes resulting in DoS for other services. * Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to an integer overflow issue. It could occur by accessing xattributes values. A privileged user inside guest could use this flaw to crash the Qemu process instance resulting in DoS. * Quick Emulator(Qemu) built with the VirtFS, host directory sharing via Plan 9 File System(9pfs) support, is vulnerable to memory leakage issue. It could occur while creating extended attribute via 'Txattrcreate' message. A privileged user inside guest could use this flaw to leak host memory, thus affecting other services on the host and/or potentially crash the Qemu process on the host. For Debian 7 "Wheezy", these problems have been fixed in version 1.1.2+dfsg-6+deb7u18. We recommend that you upgrade your qemu-kvm packages. Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: https://wiki.debian.org/LTS Share this post Link to post
