XML External Entity injection in IBM Workload Scheduler

1) XML External Entity injection

EUVDB-ID: #VU53616

Risk: Medium

CVSSv4.0: 4.8 [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 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

IBM Workload Scheduler: 9.5

CPE2.3

• cpe:2.3:a:ibm_corporation:ibm_workload_scheduler:9.5:*:*:*:*:*:*:*

External links

https://www.ibm.com/blogs/psirt/security-bulletin-vulnerability-in-java-batch-affects-websphere-application-server-liberty-cve-2021-20492/
https://www.ibm.com/support/pages/node/6549438

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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