IBM65AE66AC0A5109608F4D89BA78526339DF6A057864CE896E692649347C03832FSecurity Bulletin: IBM Verify Gateway does not sufficiently guard against unauthorized API calls (CVE-2020-4847)
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
