Bug 158993 – CAN-2005-1751 shtool insecure temporary file creation

Bug 158993 - CAN-2005-1751 shtool insecure temporary file creation

Summary:	CAN-2005-1751 shtool insecure temporary file creation

Status:	CLOSED DEFERRED

Aliases:	None

Product:	Red Hat Enterprise Linux 2.1
Classification:	Red Hat
Component:	mm (Show other bugs)
Sub Component:
Version:	2.1
Hardware:	All Linux

Priority	medium Severity low
Target Milestone:	---
Target Release:	---
Assigned To:	Nalin Dahyabhai
QA Contact:	Brian Brock
Docs Contact:

URL:
Whiteboard:	impact=low,public=20050524,source=ven...
Keywords:	Security

Depends On:
Blocks:
	Show dependency tree / graph

Reported:	2005-05-27 11:17 EDT by Josh Bressers
Modified:	2007-11-30 17:06 EST (History)
CC List:	0 users

See Also:
Fixed In Version:
Doc Type:	Bug Fix
Doc Text:
Story Points:	---
Clone Of:
Environment:
Last Closed:	2005-08-25 18:18:45 EDT
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

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Description Josh Bressers 2005-05-27 11:17:53 EDT

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.
http://www.zataz.net/adviso/shtool-05252005.txt

mm contains shtool in its source.

Comment 1 Nalin Dahyabhai 2005-08-25 18:02:50 EDT

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 18:09:48 EDT

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 18:16:10 EDT

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 18:18:45 EDT

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 18:19:15 EDT

... except I actually marked it DEFERRED.

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