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Fedora 23: 2016-e9bba2bb01 Critical: QEMU Network DoS and Buffer Issues

fedora
Calendar Grey January 12, 2016
Dist Fedora Esm H88
Important patches for qemu on Fedora 23 tackle several security flaws, including buffer overflow and denial of service vulnerabilities.
* CVE-2015-7549: pci: null pointer dereference issue (bz #1291138) * CVE-2015-8558: DoS by infinite loop in ehci_advance_state (bz #1291309) * CVE-2015-8666: Heap-based buffer over...

Summary

QEMU is a generic and open source processor emulator which achieves a good

emulation speed by using dynamic translation. QEMU has two operating modes:

* Full system emulation. In this mode, QEMU emulates a full system (for

example a PC), including a processor and various peripherials. It can be

used to launch different Operating Systems without rebooting the PC or

to debug system code.

* User mode emulation. In this mode, QEMU can launch Linux processes compiled

for one CPU on another CPU.

As QEMU requires no host kernel patches to run, it is safe and easy to use.

Update Information:

* CVE-2015-7549: pci: null pointer dereference issue (bz #1291138) * CVE-2015-8558: DoS by infinite loop in ehci_advance_state (bz #1291309) * CVE-2015-8666: Heap-based buffer overrun during VM migration (bz #1294027) * CVE-2015-8744: vmxnet3: fix crash with short packets (bz #1295440) * CVE-2015-8745: vmxnet3: don't assert reading registers in bar0 (bz #1295442)

Topics%20covered

Topics Covered

security advisory Fedora buffer overrun DoS attack critical update network issues QEMU

Change Log

References


[ 1 ] Bug #1291137 - CVE-2015-7549 Qemu: pci: null pointer dereference issue https://bugzilla.redhat.com/show_bug.cgi?id=1291137 [ 2 ] Bug #1277983 - CVE-2015-8558 Qemu: usb: infinite loop in ehci_advance_state results in DoS https://bugzilla.redhat.com/show_bug.cgi?id=1277983 [ 3 ] Bug #1283722 - CVE-2015-8666 Qemu: acpi: heap based buffer overrun during VM migration https://bugzilla.redhat.com/show_bug.cgi?id=1283722 [ 4 ] Bug #1270871 - CVE-2015-8744 Qemu: net: vmxnet3: incorrect l2 header validation leads to a crash via assert(2) call https://bugzilla.redhat.com/show_bug.cgi?id=1270871 [ 5 ] Bug #1270876 - CVE-2015-8745 Qemu: net: vmxnet3: reading IMR registers leads to a crash via assert(2) call https://bugzilla.redhat.com/show_bug.cgi?id=1270876

Update Instructions

This update can be installed with the "yum" update program. Use su -c 'yum update qemu' at the command line. For more information, refer to "Managing Software with yum", available at .

Severity
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Name: qemu
Product: Fedora 23
Version: 2.4.1
Release: 5.fc23
URL: https://www.qemu.org/
Summary: QEMU is a FAST! processor emulator

Topics%20covered

Topics Covered

security advisory Fedora buffer overrun DoS attack critical update network issues QEMU

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