Bug 451271 (CVE-2008-2729)

Summary:	CVE-2008-2729 kernel: [x86_64] The string instruction version didn't zero the output on exception.
Product:	[Other] Security Response	Reporter:	Jan Lieskovsky <jlieskov>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	anton, davids, dhoward, dwu, jpirko, lgoncalv, lwang, qcai, security-response-team, vgoyal
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:	2010-12-23 19:06:40 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:	451272, 451273, 451274, 451275, 451276, 453137
Bug Blocks:

Description Jan Lieskovsky 2008-06-13 17:25:10 UTC

Description of problem:
=======================

Andi Kleen has provided upstream fix for the following x86_64 arch
related issue:

- Don't zero for __copy_from_user_inatomic following i386.
This will prevent spurious zeros for parallel file system writers when
one does a exception
- The string instruction version didn't zero the output on
exception. Oops.

Version-Release number of selected component (if applicable):
All Linux kernel version prior 2.6.19

How reproducible:
Always
  
Actual results:
The possibility of potentially sensitive data leak.

Expected results:
No sensitive data leak.

Additional info:

Link to upstream commit:

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=3022d734a54cbd2b65eea9a024564821101b4a9a;hp=f0f4c3432e5e1087b3a8c0e6bd4113d3c37497ff

This issue discovered by Cai Qian in RH in process of RHSA-2008:0508 kernel
QA testing.

Comment 13 Vincent Danen 2010-12-23 19:06:40 UTC

This was addressed via:

Red Hat Enterprise Linux version 4 (RHSA-2008:0508)
Red Hat Enterprise Linux version 5 (RHSA-2008:0519)
MRG Realtime for RHEL 5 Server (RHSA-2008:0585)