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vm-support 0.88 File Overwrite / Information Disclosure

vm-support 0.88 File Overwrite / Information Disclosure
Posted Aug 26, 2014
Authored by Dolev Farhi

vm-support version 0.88 suffers from file overwrite and sensitive information disclosure vulnerabilities.

tags | exploit, vulnerability, info disclosure
advisories | CVE-2014-4199, CVE-2014-4200
SHA-256 | 88cde664c272d996d08d14171c3255608195c5e43983024662c4b1a6061485ae

vm-support 0.88 File Overwrite / Information Disclosure

Change Mirror Download
Author: dolevf
Date: 18.6.2014
Version: vm-support latest version 0.88
Tested on: Red Hat Enterprise Linux 6
Relevant CVEs: 2014-4199, 2014-4200


1. About the application
------------------------
VMware support is a tool designed to collect diagnostic information such
as logs, configuration files and directories, from a virtualized guest
system.
vm-support is part of the vmware-tools pack.


2. Vulnerabilities Descriptions:
-----------------------------
CVE-2014-4199: An attacker is able to over-write system files due to
insecure creation of files in /tmp by running vm-support tool,
potentially denying service to other users of the system.
CVE-2014-4200: An attacker is able to extract sensitive files from the
vm-support archive due to it having 0644 permissions and stored in /tmp
folder.



3. Release date
--------------------
26.8.2014


4. proof of concept
-----------------------

CVE-2014-4199:
=============
runcmd "ifconfig -a" "/tmp/ifconfig.$$.txt"
runcmd "mount" "/tmp/mount.$$.txt"
runcmd "dmesg" "/tmp/dmesg.$$.txt"
runcmd "ulimit -a" "/tmp/ulimit-a.$$.txt"



CVE-2014-4200:
=============
[root@server1 tmp]# ls -ld vm-2014-08-26.25023.tar.gz
-rw-r--r-- 1 root root 631081 Aug 26 17:19 vm-2014-08-26.25023.tar.gz






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