Monthly Archives: October 2010

HaXx.Me #3 – Corelan Team documentation

Last week (oct 17 2010), Lincoln (one of the Corelan Team members) informed the other team members about an ongoing hacking challenge (HaXx.Me #03) organized and hosted by MaXe (@intern0t). When I saw his message, it was already Sunday night and I knew I had to get up early the next day. Nevertheless I chose […]

In Memory Fuzzing

Introduction In memory fuzzing is a technique that allows the analyst to bypass parsers; network-related limitations such as max connections, buit-in IDS or flooding protection; encrypted or unknown (poorly documented) protocol in order to fuzz the actual underlying assembly routines that are potentially vulnerable. Prior to the development of my fuzzing toolset, I was unsatisfied […]

Corelan official IRC channel online (freenode)

#corelan Some of you may have already noticed … Corelan team decided to open an official channel on IRC (freenode).  About 24 hours ago, the channel went live and we have had the pleasure to greeting about 50 users in the channel since that time.  That’s great ! As a lot of people mentioned in […]

Death of an ftp client / Birth of Metasploit modules

Over the past few weeks, Corelan Team has given its undivided attention to fuzzing ftp client applications.

Using a custom built ftp client fuzzer, now part of the Metasploit framework, the team has audited several ftp clients and applications that use an embedded client ftp component. One example of such an application is a tool that would synchronize / backup data from a computer to a remote ftp server.

The 3 main audit/attack vectors that were used during the “project” were

send back overly long responses to ftp commands / requests sent by the ftp client to the server
send back a file/directory listing that contains overly long file/folder names
try to download a file that has an overly long filename.
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