Bug 144173 - binfmt_aout DoS
binfmt_aout DoS
Status: CLOSED NOTABUG
Product: Fedora
Classification: Fedora
Component: kernel (Show other bugs)
3
i386 Linux
medium Severity medium
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Assigned To: Dave Jones
Brian Brock
: Security
Depends On:
Blocks:
  Show dependency treegraph
 
Reported: 2005-01-04 16:47 EST by Josh Bressers
Modified: 2015-01-04 17:14 EST (History)
3 users (show)

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Doc Type: Bug Fix
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Last Closed: 2005-01-04 16:47:37 EST
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Description Josh Bressers 2005-01-04 16:47:00 EST
Marcelo Tosatti brought this to the attention of vendor-sec

The recent binfmt_aout v2.6 backport changes also fix a DoS:

ChangeSet@1.1527.1.13, 2004-12-16 16:06:31-02:00, chrisw@osdl.org
  [PATCH] a.out: error check on set_brk

  It's possible for do_brk() to fail during set_brk() when exec'ing and
  a.out.  This was noted with Florian's a.out binary and overcommit set to
  0.

  Capture this error and terminate properly.

ChangeSet@1.1527.1.16, 2004-12-17 21:45:58-02:00, chrisw@osdl.org
  [PATCH] Backport of 2.6 fix to insert_vm_struct to make it return an error
rather than BUG().

  Backport of 2.6 fix to insert_vm_struct to make it return an error
  rather than BUG().  This eliminates a user triggerable BUG() when user
  created a large vma that overlapped with arg pages during exec (could be
  triggered with a.out on i386 and x86_64 and elf on ia64).

  Signed-off-by: Chris Wright <chrisw@osdl.org>


This issue should also affect FC2
Comment 1 Josh Bressers 2005-01-04 16:47:37 EST
A second look tells me we're OK.

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