Cygwin 'setup.exe' Installation and Update Process Mirror Authenticity Verification Vulnerability

Bugtraq ID:	30375
Class:	Origin Validation Error
CVE:	CVE-2008-3323
Remote:	Yes
Local:	No
Published:	Jul 25 2008 12:00AM
Updated:	Apr 16 2015 05:56PM
Credit:	Derek Callaway
Vulnerable:	Cygwin Cygwin setup.exe 2.573.2 .2
Not Vulnerable:

Cygwin 'setup.exe' Installation and Update Process Mirror Authenticity Verification Vulnerability

Cygwin 'setup.exe' is prone to a vulnerability caused by inadequate verification of mirror authenticity.

Attackers who can impersonate a Cygwin download mirror (by exploiting a DNS cache-poisoning, session-hijacking, or some other vulnerability) could perform a man-in-the-middle attack and leverage this issue to cause the application to retrieve and install malicious packages.

Versions prior to Cygwin 'setup.exe' 2.573.2.3 are vulnerable.

Cygwin 'setup.exe' Installation and Update Process Mirror Authenticity Verification Vulnerability

Currently we are not aware of any working exploits. If you feel we are in error or if you are aware of more recent information, please mail us at: [email protected].

Cygwin 'setup.exe' Installation and Update Process Mirror Authenticity Verification Vulnerability

Solution:
The vendor released 'setup.exe' 2.573.2.3 to address this issue. Please see the references for more information.


Cygwin Cygwin setup.exe 2.573.2 .2

• Cygwin setup-2.573.2.3.exe
  http://cygwin.com/setup/snapshots/setup-2.573.2.3.exe

Cygwin 'setup.exe' Installation and Update Process Mirror Authenticity Verification Vulnerability

References:

• Cygwin Homepage (Cygwin)
  
• SECOBJADV-2008-02: Cygwin Installation and Update Process can be Subverted Vulne ([email protected])