#VU52743 XML External Entity injection in OSS Support Tools - CVE-2021-2303

Vulnerability identifier: #VU52743

Vulnerability risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-2303

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OSS Support Tools
Client/Desktop applications / Software for system administration

Vendor: Oracle

Description

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

The vulnerability exists due to insufficient validation of user-supplied XML input within the Diagnostic Assistant component. A remote administrator can pass a specially crafted XML code to the affected application and view contents of arbitrary files on the system or initiate requests to external systems.

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.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

OSS Support Tools: before 2.12.41

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External links
https://www.oracle.com/security-alerts/cpuapr2021.html
https://www.zerodayinitiative.com/advisories/ZDI-21-458/

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.