Bug 237347 (CVE-2007-2893)

Summary:	CVE-2007-2893 xen NE2000 RX Frame Heap Overflow
Product:	[Other] Security Response	Reporter:	Marcel Holtmann <holtmann>
Component:	vulnerability	Assignee:	Don Dutile (Red Hat) <ddutile>
Status:	CLOSED NOTABUG	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	kreilly, security-response-team, xen-maint
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2007-11-02 09:42:08 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	237470
Bug Blocks:

Description Marcel Holtmann 2007-04-20 21:52:54 UTC

A large value in the TXCNT register to exceed the available memory on
the device, this allows an attacker with root privileges in the guest
to poke unexpected data into the device, which results in a complete
compromise of the bochs process (see bx_ne2k_c::rx_frame(), where
s.mem is 32768 bytes, and values up to 0xffff can be inserted into
parameter iolen via the TXCNT register)

Comment 2 RHEL Program Management 2007-05-04 13:25:26 UTC

This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release.  Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products.  This request is not yet committed for inclusion in an Update
release.

Comment 3 Mark J. Cox 2007-09-19 13:32:30 UTC

Public via http://taviso.decsystem.org/virtsec.pdf
note that NE2000 is not enabled by default, see
http://lists.xensource.com/archives/html/xen-devel/2007-05/msg00021.html

Comment 5 Mark J. Cox 2007-09-24 08:43:02 UTC

Not vulnerable. This issue did not affect Xen as shipped with Red Hat Enterprise
Linux 5.