Bug 457718 – CVE-2006-5755 kernel: local denial of service due to NT bit leakage

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Bug 457718 - (CVE-2006-5755) CVE-2006-5755 kernel: local denial of service due to NT bit leakage

Summary:	CVE-2006-5755 kernel: local denial of service due to NT bit leakage

Status:	CLOSED ERRATA

Aliases:	CVE-2006-5755

Product:	Security Response
Classification:	Other
Component:	vulnerability (Show other bugs)
Sub Component:
Version:	unspecified
Hardware:	All Linux

Priority	low Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Red Hat Product Security
QA Contact:
Docs Contact:

URL:
Whiteboard:	public=20060926,reported=20060926,sou...
Keywords:	Security

Depends On:	457721 457722
Blocks:
	Show dependency tree / graph

Reported:	2008-08-04 03:39 EDT by Eugene Teo (Security Response)
Modified:	2010-12-22 14:18 EST (History)
CC List:	3 users (show)

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2010-12-22 14:18:12 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Upstream patch for this issue (2.42 KB, patch) 2008-08-04 03:49 EDT, Eugene Teo (Security Response)	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHSA-2008:0957	normal	SHIPPED_LIVE	Important: kernel security and bug fix update	2008-11-12 04:34:44 EST

Groups: None (edit)

Description Eugene Teo (Security Response) 2008-08-04 03:39:12 EDT

Description of problem:
Linux kernel before 2.6.18, when running on x86_64 systems, does not properly save or restore EFLAGS during a context switch, which allows local users to cause a denial of service (crash) by causing SYSENTER to set an NT flag, which can trigger a crash on the IRET of the next task.

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-5755

Comment 1 Eugene Teo (Security Response) 2008-08-04 03:45:34 EDT

Proposed upstream patch:
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=658fdbef66e5e9be79b457edc2cbbb3add840aa9

Comment 2 Eugene Teo (Security Response) 2008-08-04 03:49:45 EDT

Created attachment 313340 [details]
Upstream patch for this issue

Comment 8 Vincent Danen 2010-12-22 14:18:12 EST

This was addressed via:

Red Hat Enterprise Linux version 5 (RHSA-2008:0957)

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