Bug 201684 – CVE-2006-4093 Local DoS through uncleared HID0[31]

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Bug 201684 - CVE-2006-4093 Local DoS through uncleared HID0[31]

Summary:	CVE-2006-4093 Local DoS through uncleared HID0[31]

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 4
Classification:	Red Hat
Component:	kernel (Show other bugs)
Sub Component:
Version:	4.0
Hardware:	All Linux

Priority	medium Severity medium
Target Milestone:	---
Target Release:	---
Assigned To:	Janice Girouard - IBM on-site partner
QA Contact:	Brian Brock
Docs Contact:

URL:
Whiteboard:	impact=moderate,source=vendorsec,repo...
Keywords:	Security

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2006-08-08 06:34 EDT by Marcel Holtmann
Modified:	2012-05-19 19:38 EDT (History)
CC List:	3 users (show)

See Also:
Fixed In Version:	RHSA-2006-0689
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2006-10-05 15:18:35 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2006:0689	normal	SHIPPED_LIVE	Important: kernel security update	2006-10-05 00:00:00 EDT

Groups: None (edit)

Description Marcel Holtmann 2006-08-08 06:34:17 EDT

Report from Olof Johansson:

On PPC970, having HID0[31] (en_attn) set makes it possible to wedge the machine
by just doing an 'asm volatile("attn");' from userspace, clearly a local DoS
exposure. Apple firmware seems to set it and we don't clear it at boot time.

I'm not aware of any intentional exploits of this. I happened to come across it
by running crash01 from LTP, it tries to execute random data as code and kept
locking up my machine.

Comment 1 Marcel Holtmann 2006-08-08 06:35:56 EDT

Created attachment 133779 [details]
Proposed patch from Olof Johansson

Comment 5 Jason Baron 2006-09-26 11:00:36 EDT

committed in stream E5 build 42.0.3

Comment 6 RHEL Product and Program Management 2006-09-27 18:38:38 EDT

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 8 Jason Baron 2006-09-28 11:52:23 EDT

committed in stream U5 build 42.14. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/

Comment 9 Jay Turner 2006-10-03 09:39:51 EDT

QE ack for 4.5.

Comment 11 Red Hat Bugzilla 2006-10-05 15:18:36 EDT

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-2006-0689.html

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