Red Hat Bugzilla – Bug 190073
CVE-2006-2071 mprotect gives write permission to a readonly attachment
Last modified: 2013-03-06 00:59:23 EST
All of 2.4 and 2.6 kernels have been letting mprotect give write permission to a
readonly attachment of shared memory, whether or not IPC would give the caller
SUS says "The behaviour of this function [mprotect] is unspecified if the
mapping was not established by a call to mmap", but I don't think we can
interpret that as allowing it to subvert IPC permissions.
The upstream fix can be found here:
This is _not_ CVE-2006-1524. The commit message of the upstream fix is wrong.
Created attachment 130353 [details]
better test program. returns PASS, FAIL, or ABORT.
committed in stream U5 build 42.2. A test kernel with this patch is available
committed in stream E5 build 42.0.3
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux maintenance release. Product Management has requested
further review of this request by Red Hat Engineering, for potential
inclusion in a Red Hat Enterprise Linux Update release for currently deployed
products. This request is not yet committed for inclusion in an Update
QE ack for 4.5.
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,
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if the solution does not work for you.