#VU8070 XXE attack in Automated Logic Corporation products - CVE-2016-5795

Vulnerability identifier: #VU8070

Vulnerability risk: Low

CVSSv4.0: 8.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2016-5795

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
WebCTRL
Server applications / SCADA systems
SiteScan Web
Server applications / SCADA systems
i-Vu
Server applications / SCADA systems

Vendor: Automated Logic Corporation

Description
The vulnerability allows a remote attacker to conduct XXE attack.

The weakness exists in the encryption library due to improper handling of XML External Entity (XXE) entries when parsing an XML file. A remote attacker can send manipulated XML data and cause the application to execute arbitrary code or disclose file contents from a server or connected network.

Mitigation
Install update from vendor's website.

Vulnerable software versions

WebCTRL: 6.0 - 6.5

SiteScan Web: 6.1 - 6.5

i-Vu: 6.0 - 6.5

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External links
https://ics-cert.us-cert.gov/advisories/ICSA-17-150-01

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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.