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Security Bulletin: XML External Entity Injection (XXE) Vulnerability Affects IBM Secure External Authentication Server (CVE-2020-4462)

Security Bulletin


Summary

An XXE vulnerability was addressed by IBM Secure External Authentication Server.

Vulnerability Details

CVEID:   CVE-2020-4462
DESCRIPTION:   IBM Sterling External Authentication Server and IBM Sterling Secure Proxy is vulnerable to an XML External Entity Injection (XXE) attack when processing XML data. A remote attacker could exploit this vulnerability to expose sensitive information or consume memory resources.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/181482 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L)

Affected Products and Versions

Affected Product(s)Version(s)
Sterling External Authentication Server2.4.2
IBM External Authentication Server6.0
IBM External Authentication Server 6.0.16.0.1
IBM Sterling External Authentication Server2.4.3.2

Remediation/Fixes

Product

VRMF

iFix

Remediation/First Fix

IBM Secure External Authentication Server

6.0.1.1

GA

Fix Central

IBM Secure External Authentication Server

6.0.0.1

iFix 4

Fix Central

IBM Sterling External Authentication Server

2.4.3.2

iFix 8

Fix Central

IBM Sterling External Authentication Server

2.4.2.0

iFix 17

Fix Central

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

Change History

15 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

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SS6PNW","label":"IBM Sterling Secure Proxy"},"Component":"Sterling External Authentication Server","Platform":[{"code":"PF027","label":"Solaris"},{"code":"PF002","label":"AIX"},{"code":"PF016","label":"Linux"},{"code":"PF010","label":"HP-UX"},{"code":"PF033","label":"Windows"},{"code":"PF051","label":"Linux on IBM Z Systems"}],"Version":"6.0.1, 6.0.0, 2.4.3, 2.4.2","Edition":"","Line of Business":{"code":"LOB59","label":"Sustainability Software"}}]

Document Information

Modified date:
15 July 2020

UID

ibm16249317

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