#VU51643 XML External Entity injection in TranzWare e-Commerce Payment Gateway - CVE-2021-28110

Vulnerability identifier: #VU51643

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-28110

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
TranzWare e-Commerce Payment Gateway
Client/Desktop applications / Other client software

Vendor: Compass Plus Ltd

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied XML input in /exec. A remote attacker can pass a specially crafted XML code to the affected application and cause a denial of service condition on the target system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

TranzWare e-Commerce Payment Gateway: 3.1.27

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External links
https://gist.github.com/kukuxumushi/0b7d90a917ac3480066c4cbf7519b40a

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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.