Bug 168780 - CVE-2005-3276 sys_get_thread_area minor info leak
CVE-2005-3276 sys_get_thread_area minor info leak
Product: Red Hat Enterprise Linux 3
Classification: Red Hat
Component: kernel (Show other bugs)
All Linux
medium Severity low
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Assigned To: Don Howard
Brian Brock
: Security
Depends On:
Blocks: 168424
  Show dependency treegraph
Reported: 2005-09-20 06:11 EDT by Mark J. Cox
Modified: 2007-11-30 17:07 EST (History)
1 user (show)

See Also:
Fixed In Version: RHSA-2006-0144
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2006-03-15 11:41:07 EST
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RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Mark J. Cox 2005-09-20 06:11:46 EDT
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.


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 15:00:30 EDT
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 10:00:29 EDT
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 17:10:56 EDT
Patch posted for review on 6-Oct-2005.
Comment 5 Ernie Petrides 2005-10-07 22:20:31 EDT
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 11:41:08 EST
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.


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