Bug 144471 - CAN-2005-0176 unlock someone elses ipc memory
CAN-2005-0176 unlock someone elses ipc memory
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
4.0
All Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
public=20041124,impact=moderate
: Security
Depends On:
Blocks: 144195
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Reported: 2005-01-07 08:49 EST by Josh Bressers
Modified: 2015-01-04 17:15 EST (History)
6 users (show)

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Doc Type: Bug Fix
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Last Closed: 2005-02-18 12:20:52 EST
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Description Josh Bressers 2005-01-07 08:49:33 EST
*** This bug has been split off bug 142802 ***

------- Original comment by Mark J. Cox (Security Response Team) on 2004.12.14
10:34 -------

Reported on lkml a flaw that allows you to unlock someone
elses ipc memory (hence crossing permission boundary).

http://marc.theaimsgroup.com/?l=linux-kernel&m=110132782610477
http://marc.theaimsgroup.com/?l=linux-kernel&m=110137276318105

"In 2.6.8, the only processes that could lock shared memory segments
were those with CAP_IPC_LOCK.  Unprivileged processes did not get a
look in."

Looks like this is 2.6.9 (Arjan says since the fixed rhel3 mlock stuff
got merged it might be there too)
Comment 1 Josh Bressers 2005-02-18 12:20:52 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.

http://rhn.redhat.com/errata/RHSA-2005-092.html

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