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Questions tagged [unicode]

The tag has no usage guidance.

21
votes
4answers
12k views

How did Anonymous use UTF-16 ASCII to fool PHP escaping?

A few months ago, Anonymous took down a child pornography site using SQL-injection. I read in this article that Anonymous claimed that "the server was using hardened PHP with escaping," but they were ...
4
votes
4answers
12k views

SQL Injection via Unicode

My team currently uses ASP.NET with MS SQL Server for our software. Security has only become important since I started, in which there is injection vulnerabilities everywhere. Due to current ...
12
votes
1answer
9k views

Why does Directory traversal attack %C0%AF work?

Introduction: I am trying to learn the basics of Directory Traversal. Question: While trying to understand the 2-Byte Unicode conversion of characters, I came across this_SANS ARTICLE that explains ...
2
votes
1answer
1k views

All UTF-8 characters for generated passwords

Why do a lot of password generators don't generate strong passwords including chinese, arabian...-characters? All generators I saw, also the included one in my password manager keepass, just output ...
15
votes
3answers
2k views

How to defend against homograph attacks?

Referring to this Wikipedia example of an homograph attack, the URL of Wikipedia had the Latin characters A and E replaced with a similar Cyrillic copy (wikipediа.org). These characters look so ...
11
votes
3answers
2k views

White list or black list sanitation for international input?

There seem to be so many ways to create nefarious input that white-listing what input is good usually feels like the safer, simpler option. For instance, one can fairly easily craft a white list ...
7
votes
2answers
4k views

Is there a dictionary of visibly similar Unicode characters for Spam processing?

I have spam that looks like this: мy вυddy'ѕ мoм мαĸeѕ $74/нoυr oɴ тнe lαpтop. ѕнe нαѕ вeeɴ lαιd oғғ ғor ѕeveɴ мoɴтнѕ вυт lαѕт мoɴтн нer pαy cнecĸ wαѕ $19420 jυѕт worĸιɴɢ oɴ тнe lαpтop ғor α ...