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Bug 168780

Summary:	CVE-2005-3276 sys_get_thread_area minor info leak
Product:	Red Hat Enterprise Linux 3	Reporter:	Mark J. Cox <mjc>
Component:	kernel	Assignee:	Don Howard <dhoward>
Status:	CLOSED ERRATA	QA Contact:	Brian Brock <bbrock>
Severity:	low	Docs Contact:
Priority:	medium
Version:	3.0	CC:	petrides
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:	impact=low,public=20050727,source=lkml
Fixed In Version:	RHSA-2006-0144	Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2006-03-15 16:41:07 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:	168424

Description Mark J. Cox 2005-09-20 10:11:46 UTC

sys_get_thread_area does a copy_to_user on a partially unitialized structure,
which can leak a few random bits of information to userspace.

http://linux.bkbits.net:8080/linux-2.6/cset@42e81864gSEM90Oun0jA8dufpM3inw

2.4 is not affected, however RHEL3 probably is due to linux-2.4.20-o1-nptl.patch

Comment 1 Ernie Petrides 2005-09-20 19:00:30 UTC

I've confirmed that there is a 3-byte + 1-bit info leak in RHEL3.

This is a silly bug, but it is trivial to fix.

Comment 2 Mark J. Cox 2005-09-27 14:00:29 UTC

It's unfortunate that such leaks in the past have been classed as security
issues - it's not like you can particularly influence what you get or even know
the context of what you got.  I've not applied for a CVE name for this issue and
do not intend to do so for such a trivial issue of minor risk.

Comment 4 Ernie Petrides 2005-10-06 21:10:56 UTC

Patch posted for review on 6-Oct-2005.

Comment 5 Ernie Petrides 2005-10-08 02:20:31 UTC

A fix for this problem has just been committed to the RHEL3 U7
patch pool this evening (in kernel version 2.4.21-37.5.EL).

Comment 9 Red Hat Bugzilla 2006-03-15 16:41:08 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-2006-0144.html