🧞API Security Cheat Sheet PART - 4

Diverse Authentication Techniques and Their Security Implications

Unicode Escape Sequence
```
{"login": "\u0041\u0044\u004D\u0049\u004E",
 "password": "\u0050\u0041\u0053\u0053\u0057\u004F\u0052\u0044"}
```
Description: Features Unicode escape sequences, emphasizing the need for APIs to correctly interpret and handle Unicode.
Value as Object Instead of String
```
{"login": {"$oid": "507c7f79bcf86cd7994f6c0e"},
 "password": "password"}
```
Description: Demonstrates the use of an object as a value, underscoring the importance of validating value types in credentials.
Nonexistent Variables as Values
```
{"login": undefined,
 "password": undefined}
```
Description: Utilizes undefined variables, highlighting the necessity to handle unassigned or null values correctly.
Extra Nested Objects
```
{"login": "admin",
 "password": "password",
 "extra": {"key1": "value1", "key2": "value2"}}
```
Description: Contains additional nested objects, pointing out the need to manage unexpected or extraneous data structures.
Hexadecimal Values
```
{"login": "0x1234",
 "password": "0x5678"}
```
Description: Utilizes hexadecimal values, emphasizing diverse data format handling for security checks.
Extra Symbols After Valid JSON
```
{"login": "admin",
 "password": "password"}@@@@@@}
```
Description: Illustrates extraneous symbols following a valid JSON structure, highlighting the need for strict JSON syntax adherence.
Only Keys, Without Values
```
{"login":,
 "password":}
```
Description: Presents keys without corresponding values, stressing the importance of complete key-value pairs in authentication data.
Insertion of Control Characters
```
{"login": "ad\u0000min",
 "password": "pass\u0000word"}
```
Description: Features control characters within strings, underscoring the necessity of sanitizing inputs to prevent security breaches.
Long Unicode Strings
```
{"login": "\u0061"*10000,
 "password": "\u0061"*10000}
```
Description: Involves excessively long Unicode strings, indicating the need for handling and limiting input lengths.
Newline Characters in Strings
```
{"login": "ad\nmin",
 "password": "pa\nssword"}
```
Description: Incorporates newline characters, emphasizing the significance of managing special character sequences in authentication processes.

This detailed API Security Cheat Sheet is crafted to aid developers and security experts in comprehensively understanding and preparing for a wide range of authentication scenarios. Each scenario presents unique challenges, from ensuring accurate data type handling and input sanitization to managing complex and unexpected data structures, all crucial for maintaining a secure API environment.

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Last updated 2 years ago