Example Analysis of XML external entity injection vulnerability CVE-2021-20453

In this issue, the editor will bring you an example analysis of XML external entity injection vulnerability CVE-2021-20453. The article is rich in content and analyzes and describes it from a professional point of view. I hope you can get something after reading this article.

Basic information

Type of vulnerability: injection

Hazard level: ultra-dangerous

Manufacturer: IBM

Brief introduction of vulnerabilities

IBM WebSphere Application Server is vulnerable to XML external entity injection (XXE) attacks when processing XML data. Remote attackers can exploit this vulnerability to disclose sensitive information or consume memory resources.

Affected product or system

WebSphere Application Server = 7. 0

WebSphere Application Server = 8.0

WebSphere Application Server = 8.5

WebSphere Application Server = 9.0

Solution

Repair scheme:

Currently, official patches have been released for the affected versions, and affected users are advised to update the official security patches in a timely manner.

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