IBM Support

Security Bulletin: Authd service in the IBM Verify Gateway PAM components allows cleartext transmission of sensitive information (CVE-2020-4397)

Security Bulletin


Summary

The IBM Verify Gateway (IVG) Authd service listens on TCP port 12. When the service is enabled, it's possible to detect cleartext transmission of sensitive information in the data traffic to and from the port. As of v1.0.1 of IVG for AIX PAM, and v1.0.2 of IVG for Linux PAM, the Authd service is not used. The PAM module now goes directly to the tenant using TLS encryption.

Vulnerability Details

CVEID:   CVE-2020-4397
DESCRIPTION:   IBM Verify Gateway (IVG) transmits sensitive information in plain text which could be obtained by an attacker using man in the middle techniques.
CVSS Base score: 6.8
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/179428 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:N/A:N)

Affected Products and Versions

Affected Product(s)Version(s)
IBM Verify Gateway (IVG)PAM 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) PAM components. Specifically:

Workarounds and Mitigations

None

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References

Complete CVSS v3 Guide
On-line Calculator v3

Off

Related Information

IBM Secure Engineering Web Portal
IBM Product Security Incident Response Blog

Acknowledgement

Jonathan Fitz-Gerald, John Zuccato, Rodney Ryan, Chris Shepherd, Nathan Roane, Kamil Sarbinowski, Vince Dragnea, Troy Fisher and Elaheh Samani from IBM X-Force Ethical Hacking Team.

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

ibm16251321

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