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Bug 146083

Summary:	20041212 Clear ebp on sysenter return
Product:	Red Hat Enterprise Linux 4	Reporter:	Mark J. Cox <mjc>
Component:	kernel	Assignee:	Dave Jones <davej>
Status:	CLOSED ERRATA	QA Contact:
Severity:	low	Docs Contact:
Priority:	medium
Version:	4.0	CC:	jbaron, pfrields, riel
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	public=20041212,impact=low
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-02-18 17:20:54 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:
Bug Blocks:	144195

Description Mark J. Cox 2005-01-25 09:42:45 UTC

A small information leak was found by Brad Spengler, but it isn't thought to be
useful for exploitation.  Since this was fixed in FC* adding a tracking bug for EL4.

Fixed in 2.6: 
http://linux.bkbits.net:8080/linux-2.6/cset@41bc900azV2y9j9FSjVLwmow0n5mmQ

Comment 1 Arjan van de Ven 2005-02-10 02:21:08 UTC

this patch is bogus for rhel4 since we don't enable sysenter at all.

Comment 2 Dave Jones 2005-02-10 03:43:08 UTC

we do if we run 32bit OS on a CPU with NX.

Comment 3 Josh Bressers 2005-02-18 17:20:54 UTC

An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.

http://rhn.redhat.com/errata/RHSA-2005-092.html