Bug 144135 - CAN-2004-1235 isec.pl do_brk() privilege escalation
CAN-2004-1235 isec.pl do_brk() privilege escalation
Status: CLOSED ERRATA
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
3
All Linux
medium Severity high
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Assigned To: Dave Jones
Brian Brock
reported=20041222,public=20050106,imp...
: Security
Depends On:
Blocks:
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Reported: 2005-01-04 14:37 EST by Josh Bressers
Modified: 2015-01-04 17:14 EST (History)
4 users (show)

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Doc Type: Bug Fix
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Last Closed: 2005-01-10 22:00:56 EST
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Description Josh Bressers 2005-01-04 14:37:09 EST
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 14:52:10 EST
Attachment 109344 [details]
is the proposed patch for this issue.
Comment 3 Josh Bressers 2005-01-04 14:54:41 EST
This issue should also affect FC2.
Comment 4 Dave Jones 2005-01-10 22:00:56 EST
fixed in todays updates.

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