XML External Entity injection in IBM WebSphere Application Server - CVE-2021-20492

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Main Vulnerability Database Vulnerabilities #VU53616

XML External Entity injection in IBM WebSphere Application Server - CVE-2021-20492

Published: May 27, 2021


Vulnerability identifier: #VU53616
CSH Severity: Medium
CVSS v4: 8.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-20492
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to insufficient validation of user-supplied XML input. A remote attacker can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or consume memory resources.

Successful exploitation of the vulnerability may allow an attacker to view contents of arbitrary file on the server or perform network scanning of internal and external infrastructure.


Affected software

IBM WebSphere Application Server
Watson Knowledge Catalog InstaScan
Rational Asset Analyzer
IBM Cloud Private
IBM FileNet Content Manager
IBM Workload Scheduler
IBM Cloud Application Business Insights

How to mitigate CVE-2021-20492

Install updates from vendor's website.

IBM WebSphere Application Server - addressed in versions 8.0.0.15, 9.0.5.8
Watson Knowledge Catalog InstaScan - update to 1.1.7
IBM Cloud Private - addressed in versions 3.2.1.2203, 3.2.2.2203
IBM Cloud Application Business Insights - addressed in versions 1.1.5.4, 1.1.6.3

External References

Related Security Bulletins