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Bug 144137 (IT_62045)

Summary:	CAN-2004-1235 isec.pl do_brk() privilege escalation
Product:	Red Hat Enterprise Linux 2.1	Reporter:	Josh Bressers <bressers>
Component:	kernel	Assignee:	Jim Paradis <jparadis>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	high	Docs Contact:
Priority:	medium
Version:	2.1	CC:	dkl, peterm, riel, security-response-team, tao, wtogami
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	i386
OS:	Linux
Whiteboard:	reported=20041222,public=20050106,impact=important
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2005-01-21 15:37:27 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:

Description Josh Bressers 2005-01-04 19:39:40 UTC

isec.pl reported a missing down() on mmap_sem semaphore whilst calling do_brk;
so if do_brk() sleeps on a kmalloc it may get into a VMA list race - leading to
results similar to the do_brk exploit.

Comment 2 Josh Bressers 2005-01-04 19:49:25 UTC

Attachment 109343 [details]
Contains the patch for this issue.

Comment 3 Mark J. Cox 2005-01-10 09:29:46 UTC

Removing embargo

Comment 4 Jim Paradis 2005-01-17 20:50:46 UTC

A fix for this problem has also been committed to the RHEL2.1 U7
patch pool (in kernel version 2.4.9-e.59)

Comment 5 Josh Bressers 2005-01-21 15:37:27 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-2005-016.html