Bug 217999

Summary: ne2000: Stop memory access beyond buffer
Product: Red Hat Enterprise Linux 5 Reporter: Herbert Xu <herbert.xu>
Component: xenAssignee: Xen Maintainance List <xen-maint>
Status: CLOSED CURRENTRELEASE QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: 5.0   
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Hardware: All   
OS: Linux   
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Fixed In Version: RC Doc Type: Bug Fix
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Last Closed: 2007-02-08 01:10:09 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description Herbert Xu 2006-12-01 06:01:02 UTC 
[QEMU] ne2000: Stop memory access beyond buffer

As a program that runs in dom0 which serves users from guests,
the qemu drivers need to be vigilant to the input that comes
from the guests since they may be malicious.

As it is there are multiple ways to get ne2000 to read/write
memory beyond the 48K buffer that it has allocated for each
adapter.

This patch checks the addresses and prevents this from occuring.

The boundary is checked each time since it's changed for every
packet received while the other parameters are only changed
(by the guest) during setup.

Signed-off: Herbert Xu <herbert.org.au>
Comment 1 Jay Turner 2006-12-01 14:28:19 UTC 
QE ack for RHEL5.
Comment 3 RHEL Program Management 2007-02-08 01:10:09 UTC 
A package has been built which should help the problem described in 
this bug report. This report is therefore being closed with a resolution 
of CURRENTRELEASE. You may reopen this bug report if the solution does 
not work for you.