XML external entity injection in IBM Spectrum Protect Backup-Archive Client, IBM Spectrum Protect for Virtual Environments and IBM Spectrum Protect for Space Management

1) XML External Entity injection

EUVDB-ID: #VU61721

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-33813

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 within the SAXBuilder. A remote attacker 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 update from vendor's website.

Vulnerable software versions

IBM Spectrum Protect for Virtual Environments: Data Protection for Hyper-V: before 8.1.17.2

IBM Spectrum Protect for Virtual Environments: Data Protection for VMware: before 8.1.17.2

IBM Spectrum Protect for Space Management: before 8.1.17.2

IBM Spectrum Protect Backup-Archive Client: before 8.1.17.2

External links

http://www.ibm.com/support/pages/node/6962863

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.