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

Security Bulletin


An XXE vulnerability was addressed by IBM Secure Proxy.

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: 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)
IBM Secure Proxy6.0
IBM Secure Proxy
IBM Sterling Secure Proxy3.4.3.2
IBM Sterling Secure Proxy3.4.2





Remediation/First Fix

IBM Secure Proxy


Fix Central

IBM Secure Proxy

iFix 3

Fix Central

IBM Sterling Secure Proxy

iFix 8

Fix Central

IBM Sterling Secure Proxy

iFix 21

Fix Central

Workarounds and Mitigations


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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.


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.

Document Location


[{"Business Unit":{"code":"BU055","label":"Cognitive Applications"},"Product":{"code":"SS6PNW","label":"Sterling Secure Proxy"},"Component":"","Platform":[{"code":"PF002","label":"AIX"},{"code":"PF027","label":"Solaris"},{"code":"PF010","label":"HP-UX"},{"code":"PF016","label":"Linux"},{"code":"PF033","label":"Windows"},{"code":"PF051","label":"Linux on IBM Z Systems"}],"Version":"6.0.1, 6.0.0, 3.4.3, 3.4.2","Edition":"","Line of Business":{"code":"LOB02","label":"AI Applications"}}]

Document Information

Modified date:
15 July 2020