Bug 144136 - CAN-2004-1235 isec.pl do_brk() privilege escalation
Summary: CAN-2004-1235 isec.pl do_brk() privilege escalation
Alias: None
Product: Red Hat Enterprise Linux 4
Classification: Red Hat
Component: kernel
Version: 4.0
Hardware: All
OS: Linux
Target Milestone: ---
: ---
Assignee: Dave Jones
QA Contact: Brian Brock
Whiteboard: reported=20041222,public=20050106,imp...
Depends On:
Blocks: 144195
TreeView+ depends on / blocked
Reported: 2005-01-04 19:39 UTC by Josh Bressers
Modified: 2015-01-04 22:14 UTC (History)
4 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-02-18 17:21:07 UTC
Target Upstream Version:

Attachments (Terms of Use)
Proposed patch for this issue. (7.06 KB, patch)
2005-01-04 19:49 UTC, Josh Bressers
no flags Details | Diff

System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2005:092 0 important SHIPPED_LIVE Important: kernel security update 2005-02-18 05:00:00 UTC

Description Josh Bressers 2005-01-04 19:39:06 UTC
isec.pl reported a missing down() on mmap_sem semaphore whilst calling do_brk;
so if do_brk() sleeps on a kmalloc it may get into a VMA list race - leading to
results similar to the do_brk exploit.

Comment 2 Josh Bressers 2005-01-04 19:49:58 UTC
Created attachment 109344 [details]
Proposed patch for this issue.

Comment 3 Mark J. Cox 2005-01-10 09:28:25 UTC
Removing embargo

Comment 4 Josh Bressers 2005-02-18 17:21:07 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.


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