SUMMARY: A buffer overflow vulnerability in the handling of WorkStation files (.ws) by IBM Personal Communications could allow a remote attacker to cause a denial of service (application crash) or potentially execute arbitrary code on vulnerable installations of IBM Personal Communications.
CVE ID: CVE-2012-0201
IBM Personal Communications is susceptible to a buffer overflow vulnerability when handling certain specially-crafted WorkStation files (.ws). If an attacker could persuade a potential victim running a vulnerable installation of the application to open a malicious .ws file, the attacker could potentially crash the application or execute arbitrary code on the client system.
CVSS Base Score: 9.3
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/73127 for the current score
CVSS Environmental Score*: Undefined
CVSS String: (AV:N/AC:M/Au:N/C:C/I:C/A:C)
IBM Personal Communications 5.9.0 to 5.9.7 and 6.0.0 to 6.0.3 on all supported platforms.
The recommended solution is to apply the fix for this vulnerability as soon as practical. Please see below for information on the fixes available.
Apply the Personal Communications APAR IC81539 (Contact IBM Rational Client Support for information.)
Upgrade to Personal Communications 6.0.4 available at or http://www-933.ibm.com/support/fixcentral/
Workaround(s): None. Apply Fix.
Mitigation(s): The Personal Communications workstation profiles should NOT be modified by users. However, if for any reason they do need to be modified then it should only be done by an administrator.
The vulnerability was reported to IBM by Rocco Calvi of stratsec.
*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Flash.
Note: According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.