Security Bulletin
Summary
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.
Vulnerability Details
CVEID: CVE-2020-4847
DESCRIPTION:
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
| Affected Product(s) | Version(s) |
| 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 |
Remediation/Fixes
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
None
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References
Acknowledgement
Jonathan Fitz-Gerald, John Zuccato, Rodney Ryan, Chris Shepherd, Nathan Roane, Kamil Sarbinowski, Vince Dragnea, Troy Fisher and Elaheh Samani
Change History
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.
Disclaimer
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
09 March 2021
UID
ibm16252475