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Articles

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Application Security

CWE-206: Internal Behavior Leaks in Login and Multi-Step Checks

When one decision is made in two internal steps and each step is visible, attackers can attack them one at a time. CWE-206 and the login example.

Oct 18, 20263 min read
Application Security

CWE-205 Observable Behavioral Discrepancy Explained

Products that reveal their inner workings through behavior hand attackers a shortcut. What CWE-205 means and how to reduce what your system gives away.

Oct 18, 20262 min read
Application Security

CWE-204 Observable Response Discrepancy: Stop User Enumeration

Different responses for valid and invalid input let attackers map your users and internals. CWE-204 explained, with a fix for the login flow.

Oct 18, 20263 min read
Application Security

CWE-203 Observable Discrepancy: How It Happens and How to Fix It

When a system acts differently in ways an outsider can see, it leaks secrets without ever returning them. Here is how CWE-203 shows up in code and how to close it.

Oct 18, 20264 min read
Application Security

CWE-202 Exposure of Sensitive Information Through Data Queries

Statistics and search queries can reveal what direct access hides. How CWE-202 works, including the iterative match that exposed filenames.

Oct 18, 20262 min read
Application Security

CWE-201 Insertion of Sensitive Information Into Sent Data

APIs and RPC servers that return more than the caller should see leak emails and memory addresses. How CWE-201 works and how to shape responses safely.

Oct 18, 20263 min read
Application Security

CWE-200 Exposure of Sensitive Information: Causes and Fixes

Information exposure covers leaks in logs, error messages, API responses and more. How CWE-200 happens, how to find it, and how to close the gaps.

Oct 18, 20264 min read
Application Security

CWE-20 Improper Input Validation: Where It Starts and How to Fix It

CWE-20 is the parent of many bugs, from path traversal to integer overflow. A working guide to what to validate, how to find gaps, and how to fix them.

Oct 18, 20266 min read
Application Security

CWE-198 Use of Incorrect Byte Ordering: Endianness Bugs

Reading a multi byte value in the wrong byte order gives the wrong number. How CWE-198 hides in rare code paths and how to read data safely.

Oct 18, 20262 min read

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