I'm doing a cybersecurity capture the flag challenge and attempting to do buffer overflow on a server. it has an html text box that I'm trying to overflow with particular values. How can I enter ascii characters into this text box? The characters entered after a certain buffer length seem to be converted into their ascii values, so I'm trying to enter characters like NUL, EOT, etc. into the text box.
You can use the hex value, see this or this
For example from python you could use something like:
param = "\x00\x04\x03\x03"
And then send as GET request (see urllib2 or requests or httplib2)
From URL, before of the hex code you must add the % character
yourpage.html/param=%00%04%03%04
Look also this link
Related
I have the following code
<td colspan="#missingGridColumnCount">** <span translate="MissingItems">.MissingInstruments</span> **</td>
This prints correctly through the browser but when I print to my Zebra printer, I get the following on the label:
**_áMissing Items_á**
I have looked through Zebra Label documentation but cannot find a way to convert this or accept the for the labels.
This is a character encoding issue.
The probable chain of events is this:
The browser is rendering the entity into the Unicode code point "U+00A0 NO-BREAK SPACE".
This is being encoded in UTF-8, as the sequence of bytes C2 A0.
These bytes are being interpreted by the Zebra printer according to Code page 850, where C2 is mapped to "┴" (U+2534 BOX DRAWINGS LIGHT UP AND HORIZONTAL) and A0 to "á" (U+00E1 LATIN SMALL LETTER A WITH ACUTE).
In code page 850, a non-breaking space is represented by the byte FF.
You may be able to tell the whatever is interpreting the HTML to use Code page 850 instead of UTF-8, and it will send the byte sequences the printer is expecting. You will need to make sure your input doesn't contain any literal UTF-8 - escape all non-ASCII characters as HTML entities.
Otherwise, you will need to substitute byte-wise before sending to the printer, or encode in some other way.
The pricing of the Translator Text API belonging to the Azure Cognitive Services family is based on characters.
But what is the definition of a character?
Some examples:
Do spaces, punctuation and line breaks count as a character?
This is , a
test.
When translating HTML does every character count here including angle brackets, tags, slashes etc.?
<p>This is<br>
a
test.</p>
For the sake of completeness: I suppose only the text that is being sent to the API for translation counts (request characters) and not what comes back (response), right?
This is answered here character counts. All of the above examples count as text. Responses do not count.
Copying from there:
What counts is:
Text passed to the Translator Text API in the body of the request
Text when using the Translate, Transliterate, and Dictionary Lookup methods
Text and Translation when using the Dictionary Examples method
All markup: HTML, XML tags, etc. within the text field of the request body. JSON notation used to build the request (for instance "Text:") is not counted.
An individual letter
Punctuation
A space, tab, markup, and any kind of white space character
Every code point defined in Unicode
A repeated translation, even if you have translated the same text previously
I am trying to create an Html Editor. For this I am using JEditorPane, in which I want to read input from the JEditorPane character by character and want them to be stored in a string. For example: if user types <h so I want to read those two characters and according to those characters I will suggest users for the tags, in this case <html>,<header>,<head> etc (i.e. all tags starting with 'h'). So I am not getting how and which function to use to read character from JEditorPane as soon as user inputs into the JEditorPane.
So I am not getting how and which function to use to read character from JEditorPane as soon as user inputs into the JEditorPane.
You can use a DocumentListener Read the section from the Swing tutorial on How to Write a DocumentListener for more information and examples.
If you are creating an editor, which just displays the text, not the actual formatting, then you should use a JTextArea or a JTextPane. A JEditorPane is really only for displaying existing HTML files.
Keylistener worked for me. Using keylistener we can get input key strokes by the user.
We are using the Rich Text Editor in CQ, with special characters.
Whenever we add special characters by our button in the RTE, the character is added but is saved as the character in the source too, rather than the encoded HTML entity.
We are calling:
doc.execCommand("InsertHTML", false, htmlToInsert);
In htmlToInsert, we are sending the HTML code value of special character like ¥ for yen, but it is saving ¥ for yen, not ¥.
We need to store HTML code values only. Please help me in achieving this.
I'm sure there must be a lot of posts answering my query, but I am just not able to find the correct post.
In my application user is entering free from description in the text area. but when data is saved and displayed on the next page, entire text is wrapped in to single para. I want whole text to be saved as user enters it along with line spaces and newlines, tabs etc.
please redirect me to correct post. Do i have to save textarea as blob?
Thanks
Your problem is that the text is entered in plain text, however, in HTML, extra spaces are removed, and all sorts of space are just displayed as a single space character. You have to either display the text in a <pre></pre> tag (ugly way) or reformat it using regular expression or other string processing methods to make an actual HTML.