Re: Pentesting of Thick client and client-server applications

[Irene Abezgauz <irene.abezgauz () gmail com>]

Hi Balaji,

It depends on what protocol the app uses - cleartext or binary/encrypted etc. 

If it's cleartext in most cases you can make do with wireshark, netcat and a hex editor. Then you throw in some fuzzers 
etc. and you're good.

If not cleartext you will need olly or similar to tamper in memory, unless it's class serialization in which case might 
be easier to deserialize than to touch memory. 

Bottom line - it depends. 

There also can be a variety of other app-dependent things like configuration files that hold permissions on the client 
side, admin interfaces and various other surprises you could use - take a good look. 

Irene



On 7 ביונ 2011, at 06:53, Balaji Vasanth <balaji_vasanth14 () yahoo com> wrote:

> Hi,
>
> Are there any specific set of methodologies/approaches, tools for the vulnerability testing of client-server 
> applications and standalone apps developed in different languages? 
>
> I could just think of using some TCP proxies (Echomirage, TCP Catcher etc) to intercept the client-server traffic and 
> go ahead, debuggers like Ollydbug, WinDbg, GNU to understand the calls at client-side and some disassemblers & 
> fuzzers (not sure on which to choose). For some thick clients communicating on Port 80/443 with the server, i am 
> using the Fiddler plugin "Watcher". Is that good enough...?
>
> Thanks in advance
>
> Regards
>
> M. Balaji Swaminathan
>
>
>
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