Buffer Overflow affects product IBM i Access for Windows, 5770-XE1.
DESCRIPTION: IBM i Access for Windows Data Transfer Program is vulnerable to a buffer overflow, caused by improper bounds checking. A local attacker could overflow a buffer and execute arbitrary code on the system as the current user.
CVSS Base Score: 4.4
CVSS Temporal Score: See http://xforce.iss.net/xforce/xfdb/99311 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (AV:L/AC:M/Au:N/C:P/I:P/A:P)
Affected Products and Versions
Releases V5R4, 6.1 and 7.1 of IBM i Access for Windows are affected.
The issue can be fixed by applying a PTF to IBM i Access for Windows.
The IBM i Access for Windows, 5770-XE1, product will be fixed via the 7.1 service release which can be used to access all supported releases of the IBM i server.
The interim fix, prior to the service release, can be obtained via this link:
Release 7.1 ftp://public.dhe.ibm.com/as400/products/clientaccess/win32/v7r1m0/files/DataXfer/SE60990
Important note: IBM recommends that all users running unsupported versions of affected products upgrade to supported and fixed version of affected products.
Workarounds and Mitigations
Get Notified about Future Security Bulletins
Fernando Muñoz, from the NULL group
*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 Security Bulletin.
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.
18 December 2019