Bug 144173 - binfmt_aout DoS
Summary: binfmt_aout DoS
Alias: None
Product: Fedora
Classification: Fedora
Component: kernel   
(Show other bugs)
Version: 3
Hardware: i386
OS: Linux
Target Milestone: ---
Assignee: Dave Jones
QA Contact: Brian Brock
Keywords: Security
Depends On:
TreeView+ depends on / blocked
Reported: 2005-01-04 21:47 UTC by Josh Bressers
Modified: 2015-01-04 22:14 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of:
Last Closed: 2005-01-04 21:47:37 UTC
Type: ---
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:
Category: ---
oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: ---

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Description Josh Bressers 2005-01-04 21:47:00 UTC
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

  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 21:47:37 UTC
A second look tells me we're OK.

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