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

1) XXE attack

EUVDB-ID: #VU8070

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 - 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

CPE2.3

• cpe:2.3:a:automated_logic_corporation:webctrl:6.0:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:webctrl:6.1:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:webctrl:6.5:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:sitescan_web:6.1:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:sitescan_web:6.5:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:i-vu:6.0:*:*:*:*:*:*:*
• cpe:2.3:a:automated_logic_corporation:i-vu:6.5:*:*:*:*:*:*:*

External links

https://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.