;xcalc
On Sun, Jun 19, 2011 at 2:07 AM, DK <divyekap...@gmail.com> wrote:
> Hi Guys/Girls,
> I've created an interesting question. It's not strictly algorithmic, but
> it's fun:
> Given the following code, hack it to run calc.exe (on windows) or xcalc (on
> linux) or prove that such exploitation is not possible.
> It might or it might not be a simple challenge... but give it a try. :)
> #include <cstring>
> #include <iostream>
> #include <cstdlib>
> #include <cstdio>
> using namespace std;
> class X {
> public:
> void run(const char *str) {
> system(str);
> }
> };
> int main() {
> char buf[1024];
> char newCommand[2048] = "echo ";
> X* mySystem = new X();
>
> mySystem->run("echo The DK HackMe Challenge");
> mySystem->run("echo Please enter a string: ");
> scanf("%s", buf);
> mySystem->run("echo You have entered:");
> strcat(newCommand, buf);
> mySystem->run(newCommand);
> return 0;
> }
> Happy hacking!
> (Note: This is the simple version, a tougher version will be coming soon!)
> :)
> --
> DK
> http://twitter.com/divyekapoor
> http://www.divye.in
>
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--
Sanjay Ahuja,
Analyst, Financing Prime Brokerage
Nomura Securities India Pvt. Ltd
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