Bug 126127 - CAN-2004-0565 Information leak on Linux/ia64
CAN-2004-0565 Information leak on Linux/ia64
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: kernel (Show other bugs)
2.1
ia64 Linux
medium Severity medium
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Assigned To: Jim Paradis
Brian Brock
: Security
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2004-06-16 08:41 EDT by Mark J. Cox (Product Security)
Modified: 2013-08-05 21:07 EDT (History)
2 users (show)

See Also:
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Doc Type: Bug Fix
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Last Closed: 2004-12-13 15:17:15 EST
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Description Mark J. Cox (Product Security) 2004-06-16 08:41:30 EDT
Linux ia64 kernels have a floating point leak because the context
switch code checks just the psr.mfh bit and doesn't look at who the
FPH owner is.  This allows a malicious program to set the MFH bit and
look at the 
registers of another possibly sensitive process.

Patch available and committed:

http://lia64.bkbits.net:8080/to-linus-2.5/cset@1.1726.29.7

CAN-2004-0565 Affects: 2.1AS(ia64) 2.1AW
Comment 1 Jim Paradis 2004-11-29 16:54:31 EST
The referenced patch doesn't seem to exist (possibly merged out of bk or
somesuch).  Got another reference?
Comment 2 Mark J. Cox (Product Security) 2004-11-29 17:07:00 EST
I don't have the exact link to the 2.4 changeset, but here is the 2.6
changeset to help find it.
http://linux.bkbits.net:8080/linux-2.6/cset@40bfc1cbJnl_19Ig3vzEM08521rh0w
Comment 3 Jim Paradis 2004-11-29 17:18:45 EST
I found the 2.4 changeset, it's at 
http://linux.bkbits.net:8080/linux-2.4/cset@1.1425.3.1
Comment 4 John Flanagan 2004-12-13 15:17:15 EST
An errata 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-2004-504.html

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