Red Hat Bugzilla – Bug 144138
CAN-2004-1235 isec.pl do_brk() privilege escalation
Last modified: 2013-08-05 21:11:47 EDT
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.
Created attachment 109343 [details]
Proposed patch for this issue.
Does this affect RHEL3? Is a patch coming? This has been public for
9 days, and your customers are nervous.
A fix for this problem has also been committed to the RHEL2.1 U7
patch pool (in kernel version 2.4.18-e.53)
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.