CVE-2021-2400: Oracle Business Intelligence SAXParser XML External Entity Processing Information Disclosure Vulnerability

Published Jul 20, 2021

Updated

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Oracle Business Intelligence. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SAXParser endpoint, which listens on TCP port 9502 by default. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the service account.

Other sources

Vulnerability in the Oracle BI Publisher product of Oracle Fusion Middleware (component: E-Business Suite - XDO). Supported versions that are affected are 5.5.0.0.0, 11.1.1.9.0, 12.2.1.3.0 and 12.2.1.4.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Oracle BI Publisher. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Oracle BI Publisher accessible data. CVSS 3.1 Base Score 7.5 (Confidentiality impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).

Affected Software

5 affected components

Oracle Business Intelligence

Oracle BI Publisher=5.5.0.0.0

Oracle BI Publisher=11.1.1.9.0

Oracle BI Publisher=12.2.1.3.0

Oracle BI Publisher=12.2.1.4.0

Event History

Jul 20, 2021

CVE Published

via MITRE·10:44 PM

Data Sourced

via MITRE·10:44 PM

DescriptionSeverityWeakness

Jan 19, 2025

Advisory Published

via ZDI·06:26 PM

Frequently Asked Questions

What is CVE-2021-2400?

CVE-2021-2400 is a vulnerability that allows remote attackers to disclose sensitive information on affected installations of Oracle Business Intelligence.

How can this vulnerability be exploited?

This vulnerability can be exploited by sending malicious XML external entities to the SAXParser endpoint of Oracle Business Intelligence.

Is authentication required to exploit CVE-2021-2400?

No, authentication is not required to exploit this vulnerability.

What is the severity of CVE-2021-2400?

CVE-2021-2400 has a severity rating of high with a CVSS score of 7.5.

Which versions of Oracle Business Intelligence are affected by this vulnerability?

Oracle Business Intelligence versions 5.5.0.0.0, 11.1.1.9.0, 12.2.1.3.0, and 12.2.1.4.0 are affected by CVE-2021-2400.

How can I fix CVE-2021-2400?

To fix CVE-2021-2400, it is recommended to apply the necessary patches provided by Oracle.

Where can I find more information about CVE-2021-2400?

You can find more information about CVE-2021-2400 on the official Oracle Security Alerts page and the Zero Day Initiative advisory.