When the IBM Verify Gateway (IVG) components make API calls, there is insufficient protection of tenant secrets. It's possible for an attacker to obtain the access token belonging to another tenant and issue an API while impersonating that tenant. As of v1.0.1 of IVG for RADIUS and IVG for AIX PAM, and v1.0.2 of IVG for Linux PAM and IVG for Windows Login, the client API secrets, access tokens, and cookies are scrubbed so that they cannot be captured for replay in another API call.
CVSS Base score: 7.1
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N)
Affected Products and Versions
|IBM Verify Gateway (IVG)||RADIUS 1.0.0|
|IBM Verify Gateway (IVG)||PAM 1.0.0, 1.0.1|
|IBM Verify Gateway (IVG)||WinLogin 1.0.0, 1.0.1|
Log in to IBM X-Force Exchange / App Exchange and download and install the latest IBM Security Verify Gateway (renamed from IBM Verify Gateway) components. Specifically:
- IBM Security Verify Gateway for AIX PAM (Pluggable Authentication Modules) v1.0.1 at https://exchange.xforce.ibmcloud.com/hub/extension/e506cf66c5f51340cef3e1b40e8b4840
- IBM Security Verify Gateway for Linux PAM (Pluggable Authentication Modules) v1.0.2 at https://exchange.xforce.ibmcloud.com/hub/extension/80eca9a1094b416db69dfff40eb10c5a
- IBM Security Verify Gateway for RADIUS v1.0.1 at https://exchange.xforce.ibmcloud.com/hub/extension/d39efc0e03582d3eed3263d7e7022058
- IBM Security Verify Gateway for Windows Login v1.0.2 at https://exchange.xforce.ibmcloud.com/hub/extension/103b558c1aa73755641fe45493db3301
Workarounds and Mitigations
Get Notified about Future Security Bulletins
Jonathan Fitz-Gerald, John Zuccato, Rodney Ryan, Chris Shepherd, Nathan Roane, Kamil Sarbinowski, Vince Dragnea, Troy Fisher and Elaheh Samani
14 Jul 2020: Initial Publication
*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.
09 March 2021