bugtraq - Executable installers are vulnerable^WEVIL (case 14): Rapid7's ScanNowUPnP.exe allows arbitrary (remote) code execution

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Message-ID: <B33199EE31784324B74F84968FF8AFF4@W340>
Date: Tue, 22 Dec 2015 00:52:16 +0100
From: "Stefan Kanthak" <stefan.kanthak@...go.de>
To: <fulldisclosure@...lists.org>
Cc: <bugtraq@...urityfocus.com>
Subject: Executable installers are vulnerable^WEVIL (case 14): Rapid7's ScanNowUPnP.exe allows arbitrary (remote) code execution

Hi @ll,

the executable installer [°]['] (rather: the 7-Zip based executable
self-extractor [²]) of Rapid7's (better known for their flagship
Metasploit) ScanNowUPnP.exe loads and executes several rogue/bogus
DLLs eventually found in the directory it is started from (the
"application directory"), commonly known as "DLL hijacking".

For software downloaded with a web browser the application directory
is typically the "Downloads" directory: see
<https://insights.sei.cmu.edu/cert/2008/09/carpet-bombing-and-directory-poisoning.html>,
<http://blog.acrossecurity.com/2012/02/downloads-folder-binary-planting.html>
and <http://seclists.org/fulldisclosure/2012/Aug/134>

See the comprehensive write-up on Rapid7's community blog:
<https://community.rapid7.com/community/infosec/blog/2015/12/21/scannow-dll-search-order-hijacking-vulnerability-and-deprecation>

Especially note that Rapid7 removed the now deprecated ScanNowUPnP.exe
and advises all users to remove it from any system that still has it.

stay tuned
Stefan Kanthak

[°] <http://seclists.org/fulldisclosure/2015/Nov/101>

['] <http://seclists.org/bugtraq/2015/Dec/112>

[²] <http://seclists.org/bugtraq/2015/Dec/61>