XXE attack in ALC WebCTRL, Liebert SiteScan, Carrier i-VU



Published: 2017-09-01
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2016-5795
CWE-ID CWE-611
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		WebCTRL
Server applications / SCADA systems

SiteScan Web
Server applications / SCADA systems

i-Vu
Server applications / SCADA systems

Vendor Automated Logic Corporation

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) XXE attack

EUVDB-ID: #VU8070

Risk: Low

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-5795

CWE-ID: CWE-611 - Improper Restriction of XML External Entity Reference ('XXE')

Exploit availability: No

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

External links

http://ics-cert.us-cert.gov/advisories/ICSA-17-150-01


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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