Bug 209435 - CVE-2006-5174 copy_from_user information leak on s390
Summary: CVE-2006-5174 copy_from_user information leak on s390
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.0
Hardware: All
OS: Linux
medium
high
Target Milestone: ---
: ---
Assignee: Jan Glauber
QA Contact: Brian Brock
URL:
Whiteboard: impact=important,source=vendorsec,rep...
Depends On:
Blocks: 213568
TreeView+ depends on / blocked
 
Reported: 2006-10-05 12:23 UTC by Marcel Holtmann
Modified: 2007-11-30 22:07 UTC (History)
1 user (show)

Fixed In Version: RHSA-2007-0014
Doc Type: Bug Fix
Doc Text:
Clone Of:
Environment:
Last Closed: 2007-01-30 14:28:42 UTC
Target Upstream Version:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2007:0014 0 normal SHIPPED_LIVE Important: kernel security update 2007-01-30 14:25:00 UTC

Description Marcel Holtmann 2006-10-05 12:23:57 UTC 
Report from Martin Schwidefsky:

There is/has been a bug with copy_from_user on s390. The problem is that it does
not pad the kernel buffer with zeroes in case of a fault on the user address.
That allows a malicious user to read uninitialized kernel memory. The bug is
already fixed upstream:

http://www.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=52149ba6b0ddf3e9d965257cc0513193650b3ea8
Comment 3 Jason Baron 2006-10-23 19:22:23 UTC 
committed in stream U5 build 42.20. A test kernel with this patch is available
from http://people.redhat.com/~jbaron/rhel4/
Comment 4 Jason Baron 2006-12-18 21:42:11 UTC 
committed in stream E5 build 42.0.4
Comment 6 Mike Gahagan 2007-01-17 19:53:05 UTC 
The correct fix is in 42.0.6.
Comment 8 Red Hat Bugzilla 2007-01-30 14:28:42 UTC 
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.

http://rhn.redhat.com/errata/RHSA-2007-0014.html
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