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AbsoluteTelnet 10.14 DLL Hijacking

AbsoluteTelnet 10.14 DLL Hijacking
Posted Mar 21, 2016
Authored by hyp3rlinx | Site hyp3rlinx.altervista.org

AbsoluteTelnet version 10.14 suffers from a DLL hijacking vulnerability.

tags | exploit
systems | windows
MD5 | 5040ccf18b3560a2ecc3ad6b720c4bdf

AbsoluteTelnet 10.14 DLL Hijacking

Change Mirror Download
[+] Credits: hyp3rlinx

[+] Website: hyp3rlinx.altervista.org

[+] Source:
http://hyp3rlinx.altervista.org/advisories/ABSOLUTETELNET-DLL-HIJACK.txt



Vendor:
==========================
www.celestialsoftware.net



Product:
=====================
AbsoluteTelnet 10.14

AbsoluteTelnet / SSH is a telnet and SSH client with SFTP file transfer for
Windows.



Vulnerability Type:
=========================
DLL Hijack Code Execution



CVE Reference:
==============
N/A



Vulnerability Details:
=====================

AbsoluteTelnet will execute arbitrary code via DLL "stauto32.dll" from CWD
or if placed in certain locations... e.g. Desktop etc...

When AbsoluteTelnet installs it creates a shortcut in the start list under
start run with an empty "Start" field under the properties for the shortcut.
If a user drags this shortcut to desktop or creates a new one, and DLL
named "stauto32.dll" exists in this case on desktop. The DLL will be
executed when
AbsoluteTelnet is run. Other scenarios may include connecting to or opening
documents from a network share where an attacker has compromised that share.


Reference:
http://www.celestialsoftware.net/absolutetelnet-ssh-client/absolutetelnet/ssh-version-history-9.53.html

Users should upgrade to version 10.15

POC steps...

1- create malicious DLL "stauto32.dll" place in Desktop
2- run vulnerable AbsoluteTelnet version from shortcut sent to desktop
3- arbitrary DLL code executed



Disclosure Timeline:
=====================================
Vendor Notification: Feb 23, 2016
Vendor confirms vulnerability
Vendor releases fixed version 10.15
March 20, 2016 : Public Disclosure




Severity Level:
================
High



[+] Disclaimer
Permission is hereby granted for the redistribution of this advisory,
provided that it is not altered except by reformatting it, and that due
credit is given. Permission is explicitly given for insertion in
vulnerability databases and similar, provided that due credit is given to
the author.
The author is not responsible for any misuse of the information contained
herein and prohibits any malicious use of all security related information
or exploits by the author or elsewhere. All Content is (c) of hyp3rlinx.

hyp3rlinx
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