full-disclosure - [FD] Multiple Automated Logic Corporation WebCTRL XML External Entity Injection (CVE-2018-8819)

Open Source and information security mailing list archives

Date: Fri, 8 Jun 2018 10:40:05 -0600
From: Hate Shape <hateshape@...il.com>
To: fulldisclosure@...lists.org
Subject: [FD] Multiple Automated Logic Corporation WebCTRL XML External
 Entity Injection (CVE-2018-8819)

# (CVE-2018-8819)

## Product Description
WebCTRL is a BACnet native, intelligent, HVAC and energy control system for
your building. A proven, industry-leading system, the WebCTRL® building
automation system gives you the ability to fully understand your operations
and analyze the results with tools that make sense to you.

## Vulnerability Type
Out-of-Band (OOB) External Entity Injection (XXE)

## Vulnerability Description
An OOB XXE issue was discovered in Automated Logic Corporation (ALC)
WebCTRL versions 6.0, 6.1 and 6.5. The issue can be exploited by adding an
X-Wap-Profile HTTP header that references an XML payload on an attacker
controlled system to regular application network communications.

## Exploit
A proof of concept is available here:
https://hateshape.github.io/general/2018/06/07/CVE-2018-8819.html

## Versions
All WebCTRL versions 6.5 prior to cumulative patch #10 for WebCTRL
All WebCTRL versions 6.1 prior to cumulative patch #9 for WebCTRL
All WebCTRL versions 6.0 prior to cumulative patch #15 for WebCTRL

## Mitigation(s)
Apply cumulative patch #11 for WebCTRL for Version 6.5
Apply cumulative patch #9 for WebCTRL for Version 6.1
Apply cumulative patch #15 for WebCTRL for Version 6.0

## Attack Type
Remote, Unauthenticated

## Impact
The full contents of files, owned by the vulnerable process, on the
underlying operating system can be exfiltrated by an unauthenticated user.

## Credit
This vulnerability was discovered by Darrell Damstedt <hateshape () gmail
com>.

## References
CVE: http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-8819

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