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Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
QEMU VNC Websockets Decoder Lets Remote Users on the Local Network Consume Excessive Memory and CPU Resources
SecurityTracker Alert ID:  1033975
SecurityTracker URL:  http://securitytracker.com/id/1033975
CVE Reference:   CVE-2015-1779   (Links to External Site)
Date:  Oct 27 2015
Impact:   Denial of service via network
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in QEMU. A remote user on the local network can consume excessive memory and CPU resources on the target system.

A remote user on the local network can send specially crafted data to the target VNC websockets protocol decoder to cause QEMU to consume all available system memory.

Daniel P. Berrange of Red Hat reported this vulnerability.

Impact:   A remote user can consume excessive memory and CPU resources on the target system.
Solution:   The vendor has issued a source code fix (for 'ui/vnc-ws.c', 'ui/vnc-ws.h', and 'ui/vnc.h') [in March 2015].
Vendor URL:  wiki.qemu.org/Main_Page (Links to External Site)
Cause:   Resource error
Underlying OS:  Linux (Any), UNIX (Any), Windows (Any)

Message History:   This archive entry has one or more follow-up message(s) listed below.
Oct 27 2015 (Red Hat Issues Fix) QEMU VNC Websockets Decoder Lets Remote Users on the Local Network Consume Excessive Memory and CPU Resources
Red Hat has issued a fix for Red Hat Enterprise Linux 7.
Oct 27 2015 (Red Hat Issues Fix for Red Hat Enterprise Virtualization) QEMU VNC Websockets Decoder Lets Remote Users on the Local Network Consume Excessive Memory and CPU Resources
Red Hat has issued a fix for Red Hat Enterprise Virtualization.
Oct 27 2015 (Oracle Issues Fix for Oracle Linux) QEMU VNC Websockets Decoder Lets Remote Users on the Local Network Consume Excessive Memory and CPU Resources
Oracle has issued a fix for Oracle Linux 7.
Oct 29 2015 (CentOS Issues Fix) QEMU VNC Websockets Decoder Lets Remote Users on the Local Network Consume Excessive Memory and CPU Resources
CentOS has issued a fix for CentOS Linux 7.



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