full-disclosure - [FD] VMware vm-support multiple vulnerabilities

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Message-Id: <emf9d6a05c-e612-4889-b130-fe43cc13fb70@tlv-l-farhi>
Date: Tue, 26 Aug 2014 14:37:21 +0000
From: "Dolev Farhi" <dolevf@...oo.com>
To: fulldisclosure@...lists.org
Subject: [FD] VMware vm-support multiple vulnerabilities

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@...ver1 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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