Skip to main content

Email Injection

There are a lot of ways to send anonymous emails, some use it to mass mail, some use it to spoof identity, and some (a few) use it to send email anonymously. Usually a web mailform using the mail() function generates emails containing headers with the originating IP of the server it's running on. Therefore the mailform acts as a SMTP proxy. The input fields of the form may vary, but it is common to specify a mailform that gives you control over the subject, the message, and the sender's email address.

Function usage : mail([RECIPIENT],[SUBJECT],[MESSAGE],[EXTRAHEADERS],[EXTRAPARAMS]);


In this context, the target is to be able to send anonymous emails to other recipients. There are numerous additional fields that can be specified in the mail headers (see [ RFC 822 ]). For example 'Cc' (Carbon Copy), which sends a copy of the message to the email addresses given as arguments. A better choice is to use the 'Bcc' (Blind Carbon Copy) which sends a carbon copy of the message just like with the 'Cc' header, except that the recipiends email addresses given as arguments are not shown to the multiple recipients' headers. As specified in the [ RFC 822 ], one must add a line feed for every header. The <LF> (line feed) char has a hexadecimal value of 0x0A.

Thus by providing the following values to the example script of this article : -
Sender : <blocquote> "sender@anonymous.www%0ACc:recipient@someothersite.xxx%0ABcc:somebloke@grrrr.xxx,someotherbloke@oooops.xxx" </blocquote>
"ahem" </blocquote> - Message : <blocquote> "My Message..."
</blocquote>

Now The Raw email data will look like
To: recipient@victim.xxx
Subject: ahem
From: sender@anonymous.xxx
Cc:recipient@someothersite.xxx
Bcc:somebloke@grrrr.xxx,someotherbloke@oooops.xxx
My Message...



Let's keep the same value for subject and message, and give the following value to the sender : email@anonymous.xxx%0ATo:email1@who.xxx
the mail output is :
To: recipient@victim.xxx
Subject: Hum
From: email@anonymous.xxx
To:email1@who.xxx
My Message...


Repeating the 'To' header won't be a problem, the mail will be sent to recipient@victim.xxx AND email1@who.xxx.

Comments

Popular posts from this blog

Animated Cursor Vulnerability

Step1: create two file on attacker side 1) default index.html and 2) cursor file to load

Now save the proof of concept in a txt file(cursor.txt). use above command to cut down the hex part from proof of concept and paste it in buffer.ani
Step2:upload the above two files in your apache webserver. 
Step3: Try to open index.html from window-xp and analyse the behavior of IE using ollydgb in order to find the offset address where EIP will get over written. Attach IE in ollydgb and put malicious url in it.

As we can see now that EIP is overwritten with 42424242 that means this place is our offset.
Now we will put the address of jump instruction in place of 42424242 which we will get from user32.dll by searching for command JUMP DWORD [EBX],now we jumped at ebx because it contain the malicious .ani file address.


Just go into view=>executable=>user32.dll , press enter.


Now try to find a jump [ebx] instruction in user32.dll by pressing ctrl+f.Now note down the address of this instruction.…

Hacking Windows 10 UWP App: DLL Injection & common Vulnerabilities

I recently started working on  widows 10 Apps( Apps not Applications) security. Before diving deep in hacking terms lets try to understand what's new in Windows 10 UWP( Universal Platform) as compared to old Apps. Lets begin with how apps actually work on windows 10(desktop/tablet). Now windows 10 comes with a container only for running apps inside the isolated environment. By default, /APPCONTAINER(Linker Flag) is off. This option modifies an executable to indicate whether the app must be run in the appcontainer process-isolation environment. Specify /APPCONTAINER for an app that must run in the appcontainer environment—for example, a Windows Store app. (The option is set automatically in Visual Studio when you create a Windows Store app from a template.) For a desktop app, specify /APPCONTAINER:NO or just omit the option. The /APPCONTAINER option was introduced in Windows 8.
Now there is no registry entry concept for these app in the System HIVE rather they install they own hiv…

Assignment 01(Enroll TO Offensive-Security Course)

Steps 1:download the page.
2:open fc4.js in your favourite editor and add following lines in it or just replace it with vode given below.
3:then open the download html file in browser and fill the form with your email and a garbage value string.
4:thats it? it will show you the real security string??
yeah but  ...theirs another challenge waiting for you ... :D

function fc4me(srvstr) {

   if(!document.pleazfc4me.email.value || !document.pleazfc4me.securitystring.value) {
      alert("Please fill in all the required fields!");
      return false;
   }
   else {
      document.pleazfc4me.submit();
    }
   var t=hexMD5("\x74\x72\x79\x68\x61\x72\x64\x65\x72"+srvstr)
alert(t)
document.write(t)
}



Finally Got In :-)