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
CVSSv4.0: 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/E:U/U:Green
CVE-ID: CVE-2021-20492
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
IBM WebSphere Application Server
Software vendor:
IBM Corporation

Description

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.


Remediation

Install updates from vendor's website.

External links