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Bug 158993 - CAN-2005-1751 shtool insecure temporary file creation
Summary: CAN-2005-1751 shtool insecure temporary file creation
Alias: None
Product: Red Hat Enterprise Linux 2.1
Classification: Red Hat
Component: mm
Version: 2.1
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Nalin Dahyabhai
QA Contact: Brian Brock
Whiteboard: impact=low,public=20050524,source=ven...
Depends On:
TreeView+ depends on / blocked
Reported: 2005-05-27 15:17 UTC by Josh Bressers
Modified: 2007-11-30 22:06 UTC (History)
0 users

Fixed In Version:
Doc Type: Bug Fix
Doc Text:
Clone Of:
Last Closed: 2005-08-25 22:18:45 UTC
Target Upstream Version:

Attachments (Terms of Use)

Description Josh Bressers 2005-05-27 15:17:53 UTC
Race condition in shtool 2.0.1 and earlier allows local users to
create or modify arbitrary files via a symlink attack on the
.shtool.$$ temporary file.

mm contains shtool in its source.

Comment 1 Nalin Dahyabhai 2005-08-25 22:02:50 UTC
shtool is used at build-time, and is not part of either the mm or mm-devel
binary packages.

Comment 2 Josh Bressers 2005-08-25 22:09:48 UTC
Correct, this issue (while very remote I know) is only exploitable if mm is
rebuilt from source.

The advisory states that shtool is only vulnerable if it is used for the
following operations:
tarball, subst, scpp and path.

I have not verified if mm uses these or not.

Comment 3 Nalin Dahyabhai 2005-08-25 22:16:10 UTC
During package build, the makefile calls shtool for these operations:
  version mkdir install
If you attempt to make a new tarball, either with the "snap" or "dist" targets
(we don't), then it's used for:
  fixperm version tarball

So I don't think we have a problem here.

Comment 4 Nalin Dahyabhai 2005-08-25 22:18:45 UTC
Closure note: if we update to a newer version of mm, the problem goes away even
for the make targets we don't call, so marking this WONTFIX.

Comment 5 Nalin Dahyabhai 2005-08-25 22:19:15 UTC
... except I actually marked it DEFERRED.

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