lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  PHC 
Open Source and information security mailing list archives
Hash Suite for Android: free password hash cracker in your pocket
[<prev] [next>] [day] [month] [year] [list]
Date: Wed, 15 Oct 2014 20:48:00 +0200
From: Nicolas Grégoire <>
Subject: [FD] Bypassing blacklists based on IPy

IPy is a Python "class and tools for handling of IPv4 and IPv6 addresses
and networks" ( This library is
sometimes used to implement blacklists forbidding internal, private or
loopback addresses.

Using octal encoding (supported by urllib2), it is possible to bypass
checks based on the result of the iptype() function. For example, IP
address '0177.0000.0000.0001' is considered as 'PUBLIC' but resolves to
'' when accessed via urllib2.

Developers were informed, no news since then... More details on my blog:

Nicolas Grégoire

Sent through the Full Disclosure mailing list
Web Archives & RSS:

Powered by blists - more mailing lists