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
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2006-5755
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 457721 457722
Blocks:
TreeView+ depends on / blocked
 
Reported: 2008-08-04 07:39 UTC by Eugene Teo (Security Response)
Modified: 2019-09-29 12:26 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2010-12-22 19:18:12 UTC
Embargoed:

Attachments (Terms of Use)
Upstream patch for this issue (2.42 KB, patch)
2008-08-04 07:49 UTC, Eugene Teo (Security Response) 		no flags Details | Diff
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Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2008:0957 0 normal SHIPPED_LIVE Important: kernel security and bug fix update 2008-11-12 09:34:44 UTC

Description Eugene Teo (Security Response) 2008-08-04 07:39:12 UTC 
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 07:45:34 UTC 
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 07:49:45 UTC 
Created attachment 313340 [details]
Upstream patch for this issue
Comment 8 Vincent Danen 2010-12-22 19:18:12 UTC 
This was addressed via:

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