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Category:   Application (Generic)  >   QEMU Vendors:   QEMU.org
QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
SecurityTracker Alert ID:  1033569
SecurityTracker URL:  http://securitytracker.com/id/1033569
CVE Reference:   CVE-2015-5279   (Links to External Site)
Date:  Sep 16 2015
Impact:   Denial of service via network, User access via local system
Fix Available:  Yes  Vendor Confirmed:  Yes  

Description:   A vulnerability was reported in QEMU. A local user on the guest system can cause denial of service conditions on the host system or potentially execute arbitrary code on the host system.

A local privileged user on the guest system can trigger a buffer overflow in the ne2000_receive() function and cause the target QEMU instance to crash or potentially execute arbitrary code on the host system.

Systems built with the NE2000 NIC emulation support are affected.

Impact:   A local user on the guest system can cause denial of service conditions on the host system or potentially execute arbitrary code on the host system.
Solution:   The vendor has issued a source code fix, available at:

https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg03984.html

Vendor URL:  wiki.qemu.org/Main_Page (Links to External Site)
Cause:   Access control 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 23 2015 (Red Hat Issues Fix for Red Hat Enterprise Virtualization) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
Red Hat has issued a fix for Red Hat Enterprise Virtualization.
Oct 24 2015 (Red Hat Issues Fix for KVM) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
Red Hat has issued a fix for KVM for Red Hat Enterprise Linux
Oct 24 2015 (Red Hat Issues Fix) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
Red Hat has issued a fix for Red Hat Enterprise Linux 6.
Nov 16 2015 (Red Hat Issues Fix) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
Red Hat has issued a fix for Red Hat Enterprise Linux 5.
Nov 16 2015 (CentOS Issues Fix) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
CentOS has issued a fix for CentOS Linux 5.
Nov 17 2015 (Oracle Issues Fix for Oracle Linux for Xen) QEMU Buffer Overflow in ne2000_receive() Lets Local Guest Users Deny Service or Execute Arbitrary Code on the Host System
Oracle has issued a fix for Xen for Oracle Linux 5.



 Source Message Contents

Subject:  [oss-security] CVE-2015-5279 Qemu: net: add checks to validate ring buffer pointers

   Hello,

Qemu emulator built with the NE2000 NIC emulation support is vulnerable to a 
heap buffer overflow issue. It could occur when receiving packets over the 
network.

A privileged user inside guest could use this flaw to crash the Qemu instance 
or potentially execute arbitrary code on the host.

Upstream fix:
-------------
   -> https://lists.gnu.org/archive/html/qemu-devel/2015-09/msg03984.html


Thank you.
--
Prasad J Pandit / Red Hat Product Security Team
47AF CE69 3A90 54AA 9045 1053 DD13 3D32 FE5B 041F
 
 


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