Bug 144135

Summary: CAN-2004-1235 isec.pl do_brk() privilege escalation
Product: [Fedora] Fedora Reporter: Josh Bressers <bressers>
Component: kernelAssignee: Dave Jones <davej>
Status: CLOSED ERRATA QA Contact: Brian Brock <bbrock>
Severity: high Docs Contact:
Priority: medium    
Version: 3CC: pfrields, riel, security-response-team, wtogami
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard: reported=20041222,public=20050106,impact=important
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2005-01-11 03:00:56 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:

Description Josh Bressers 2005-01-04 19:37:09 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 19:52:10 UTC
Attachment 109344 [details]
is the proposed patch for this issue.

Comment 3 Josh Bressers 2005-01-04 19:54:41 UTC
This issue should also affect FC2.

Comment 4 Dave Jones 2005-01-11 03:00:56 UTC
fixed in todays updates.