Bug 157450 - CAN-2005-1263 Linux kernel ELF core dump privilege elevation
CAN-2005-1263 Linux kernel ELF core dump privilege elevation
Status: CLOSED ERRATA
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel (Show other bugs)
4.0
All Linux
medium Severity high
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Assigned To: Dave Jones
Brian Brock
public=20050511,source=isec,reported=...
: Security
Depends On:
Blocks:
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Reported: 2005-05-11 14:27 EDT by Mark J. Cox (Product Security)
Modified: 2015-01-04 17:19 EST (History)
4 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
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Last Closed: 2005-06-08 11:14:12 EDT
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Attachments (Terms of Use)
Proposed patch from Greg KH (not backported) (1.74 KB, patch)
2005-05-11 14:27 EDT, Mark J. Cox (Product Security)
no flags Details | Diff

  None (edit)
Description Mark J. Cox (Product Security) 2005-05-11 14:27:48 EDT
Created attachment 114254 [details]
Proposed patch from Greg KH (not backported)
Comment 1 Mark J. Cox (Product Security) 2005-05-11 14:27:48 EDT
"A locally exploitable flaw has been found in the Linux ELF binary format
loader's core dump  function  that  allows  local  users  to  gain  root
privileges and also execute arbitrary code at kernel privilege level."

For the full description see
http://www.securityfocus.com/archive/1/397966/2005-05-08/2005-05-14/0
Comment 5 Rahul Sundaram 2005-05-12 02:30:12 EDT
A new release which fixes this problem upstream has been released as 2.6.11.9

http://lwn.net/Articles/135583/
Comment 6 Mark J. Cox (Product Security) 2005-05-12 05:54:17 EDT
Note that a sucessful mitigation to this issue is to limit the production of
core files, "ulimit -c 0" placed early during system startup (say from
rc.sysinit) will remove the risk of this issue.
Comment 7 Tim Burke 2005-05-12 09:39:33 EDT
This went into 2.6.9-9, so its in U1.
Comment 8 Josh Bressers 2005-05-31 16:39:18 EDT
It would seem that this issue doesn not affect 2.6 kernels.  The patch hardens
things a bit, but doesn't fix any security issues.
Comment 9 Mark J. Cox (Product Security) 2005-06-01 05:45:18 EDT
In the U1 kernel errata we will list this bug, since we've fixed this issue, but
we won't list the CVE name since CAN-2005-1263 has no security context for EL4.
Comment 10 Tim Powers 2005-06-08 11:14:12 EDT
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-2005-420.html

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