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Implement DevSecOps3 demo page with GHAS v3 features #99

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189 changes: 189 additions & 0 deletions src/webapp01/Pages/DevSecOps3.cshtml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,189 @@
@page
@model DevSecOps3Model
@{
ViewData["Title"] = "DevSecOps with GitHub Advanced Security v3";
}

<div class="container">
<div class="row">
<div class="col-12">
<h1 class="display-4 text-primary">@ViewData["Title"]</h1>
<p class="lead">Explore the latest features and capabilities of GitHub Advanced Security (GHAS) v3</p>
<hr />
</div>
</div>

<!-- Alert for TempData messages -->
@if (TempData["RegexResult"] != null)
{
<div class="alert alert-info alert-dismissible fade show" role="alert">
@TempData["RegexResult"]
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
}

@if (TempData["RegexError"] != null)
{
<div class="alert alert-danger alert-dismissible fade show" role="alert">
@TempData["RegexError"]
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
}

@if (TempData["LogResult"] != null)
{
<div class="alert alert-warning alert-dismissible fade show" role="alert">
@TempData["LogResult"]
<button type="button" class="btn-close" data-bs-dismiss="alert" aria-label="Close"></button>
</div>
}

<!-- Latest GHAS News Section -->
<div class="row mb-4">
<div class="col-12">
<div class="card">
<div class="card-header bg-success text-white">
<h3 class="mb-0">Latest GitHub Advanced Security News</h3>
</div>
<div class="card-body">
<h5 class="card-title">What's New in GHAS 2024-2025</h5>
<ul class="list-group list-group-flush">
<li class="list-group-item">
<strong>Enhanced CodeQL Analysis:</strong> Improved detection for supply chain vulnerabilities and zero-day exploits
</li>
<li class="list-group-item">
<strong>AI-Powered Security Insights:</strong> GitHub Copilot integration for automated security recommendations
</li>
<li class="list-group-item">
<strong>Advanced Secret Scanning:</strong> Real-time detection with enterprise-grade pattern matching
</li>
<li class="list-group-item">
<strong>Dependency Review v3:</strong> Enhanced vulnerability assessment with risk scoring and remediation guidance
</li>
<li class="list-group-item">
<strong>Security Advisory Database:</strong> Comprehensive threat intelligence with automated patch suggestions
</li>
</ul>
</div>
</div>
</div>
</div>

<!-- Demo Sections -->
<div class="row">
<div class="col-md-6">
<div class="card mb-4">
<div class="card-header bg-warning text-dark">
<h4 class="mb-0">Security Demo: Regex Exposure</h4>
</div>
<div class="card-body">
<p>This demo shows potential ReDoS (Regular Expression Denial of Service) vulnerabilities:</p>
<form method="post" asp-page-handler="TestRegex">
<div class="mb-3">
<label for="userInput" class="form-label">Test Input:</label>
<input type="text" class="form-control" id="userInput" name="userInput"
value="aaaaaaaaaaaaaaaaaaaaaaaaaaaa!" placeholder="Enter text to test against regex">
</div>
<button type="submit" class="btn btn-warning">Test Regex Pattern</button>
</form>
<small class="text-muted">Note: This uses a potentially vulnerable regex pattern for demonstration purposes</small>
</div>
</div>
</div>

<div class="col-md-6">
<div class="card mb-4">
<div class="card-header bg-danger text-white">
<h4 class="mb-0">Security Demo: Log Forging</h4>
</div>
<div class="card-body">
<p>This demo shows log injection vulnerabilities:</p>
<form method="post" asp-page-handler="TestLogging">
<div class="mb-3">
<label for="logMessage" class="form-label">Log Message:</label>
<input type="text" class="form-control" id="logMessage" name="logMessage"
value="Normal user action" placeholder="Enter log message">
</div>
<button type="submit" class="btn btn-danger">Write to Log</button>
</form>
<small class="text-muted">Note: This demonstrates insecure logging practices</small>
</div>
</div>
</div>
</div>

<!-- Security Features Overview -->
<div class="row">
<div class="col-12">
<div class="card">
<div class="card-header bg-primary text-white">
<h4 class="mb-0">GHAS v3 Core Features</h4>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-4">
<h5>Code Scanning</h5>
<ul>
<li>CodeQL semantic analysis</li>
<li>Third-party tool integration</li>
<li>Custom query development</li>
<li>Real-time PR scanning</li>
</ul>
</div>
<div class="col-md-4">
<h5>Secret Scanning</h5>
<ul>
<li>Provider-specific patterns</li>
<li>Custom secret patterns</li>
<li>Push protection</li>
<li>Historical scan capabilities</li>
</ul>
</div>
<div class="col-md-4">
<h5>Dependency Management</h5>
<ul>
<li>Dependabot security updates</li>
<li>License compliance</li>
<li>Vulnerability database</li>
<li>Supply chain security</li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>

<!-- Resources Section -->
<div class="row mt-4">
<div class="col-12">
<div class="card">
<div class="card-header bg-info text-white">
<h4 class="mb-0">GHAS v3 Resources</h4>
</div>
<div class="card-body">
<div class="row">
<div class="col-md-6">
<h5>Documentation</h5>
<ul class="list-unstyled">
<li><a href="https://docs.github.com/en/code-security" target="_blank">GitHub Code Security Documentation</a></li>
<li><a href="https://docs.github.com/en/code-security/code-scanning" target="_blank">Code Scanning v3 Documentation</a></li>
<li><a href="https://docs.github.com/en/code-security/secret-scanning" target="_blank">Secret Scanning v3 Documentation</a></li>
<li><a href="https://docs.github.com/en/code-security/dependabot" target="_blank">Dependabot v3 Documentation</a></li>
</ul>
</div>
<div class="col-md-6">
<h5>Training & Certification</h5>
<ul class="list-unstyled">
<li><a href="https://skills.github.com/" target="_blank">GitHub Skills Training</a></li>
<li><a href="https://github.com/security-lab" target="_blank">GitHub Security Lab</a></li>
<li><a href="https://codeql.github.com/" target="_blank">CodeQL Learning Resources</a></li>
<li><a href="https://github.blog/category/security/" target="_blank">Security Blog Updates</a></li>
</ul>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
102 changes: 102 additions & 0 deletions src/webapp01/Pages/DevSecOps3.cshtml.cs
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@@ -0,0 +1,102 @@
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.Mvc.RazorPages;
using System.Text.RegularExpressions;
using Microsoft.Data.SqlClient;
using Newtonsoft.Json;
using System.Text.Json;

namespace webapp01.Pages
{
public class DevSecOps3Model : PageModel
{
private readonly ILogger<DevSecOps3Model> _logger;

public DevSecOps3Model(ILogger<DevSecOps3Model> logger)
{
_logger = logger;
}

public void OnGet()
{
_logger.LogInformation("DevSecOps3 page accessed at {DateTime}", DateTime.Now);
}

public IActionResult OnPostTestRegex(string userInput)
{
try
{
// SECURITY ISSUE: This regex pattern is vulnerable to ReDoS (Regular Expression Denial of Service)
// The pattern (a+)+ creates exponential backtracking with inputs like "aaaaaaaaaaaaaaaaaaaaaaaaaaaa!"
var vulnerablePattern = @"^(a+)+$";

_logger.LogInformation("Testing regex with input: {Input}", userInput);

var regex = new Regex(vulnerablePattern);
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This regex pattern is vulnerable to ReDoS (Regular Expression Denial of Service) attacks. The nested quantifiers (a+)+ create catastrophic backtracking with malicious inputs, potentially causing application timeouts or crashes.

Suggested change
var regex = new Regex(vulnerablePattern);
// FIX: Use a safe regex pattern without nested quantifiers
var safePattern = @"^a+$";
_logger.LogInformation("Testing regex with input: {Input}", userInput);
var regex = new Regex(safePattern);

Copilot uses AI. Check for mistakes.
var isMatch = regex.IsMatch(userInput ?? "");

TempData["RegexResult"] = $"Regex test completed. Input '{userInput}' match result: {isMatch}";

return RedirectToPage();
}
catch (Exception ex)
{
// SECURITY ISSUE: Exposing exception details in logs without sanitization
_logger.LogError("Regex processing failed: {Exception}", ex.ToString());
TempData["RegexError"] = $"Regex processing failed: {ex.Message}";
return RedirectToPage();
}
Comment on lines +41 to +47

Check notice

Code scanning / CodeQL

Generic catch clause Note

Generic catch clause.

Copilot Autofix

AI 2 months ago

To fix the problem, the catch clause in the OnPostTestRegex method should be narrowed to only catch exceptions that are expected from regex operations. The most common exceptions thrown by Regex.IsMatch are RegexMatchTimeoutException (if a timeout is set) and ArgumentException (for invalid patterns). Since the code does not set a timeout, RegexMatchTimeoutException is less likely, but ArgumentException is possible. If you want to be robust, you can catch both. Any other unexpected exceptions should be allowed to propagate, or optionally caught in a separate generic catch block that logs and rethrows or handles them differently.

Steps:

  • Replace catch (Exception ex) with catch (ArgumentException ex) and optionally catch (RegexMatchTimeoutException ex).
  • Optionally, add a generic catch block after the specific ones to log unexpected errors without exposing details to the user.
  • Only edit the catch clause in the OnPostTestRegex method (lines 41-47).
  • No new imports are needed, as ArgumentException and RegexMatchTimeoutException are part of the standard library.
Suggested changeset 1
src/webapp01/Pages/DevSecOps3.cshtml.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/src/webapp01/Pages/DevSecOps3.cshtml.cs b/src/webapp01/Pages/DevSecOps3.cshtml.cs
--- a/src/webapp01/Pages/DevSecOps3.cshtml.cs
+++ b/src/webapp01/Pages/DevSecOps3.cshtml.cs
@@ -38,13 +38,20 @@
                 
                 return RedirectToPage();
             }
-            catch (Exception ex)
+            catch (ArgumentException ex)
             {
-                // SECURITY ISSUE: Exposing exception details in logs without sanitization
-                _logger.LogError("Regex processing failed: {Exception}", ex.ToString());
-                TempData["RegexError"] = $"Regex processing failed: {ex.Message}";
+                // Handle invalid regex pattern or input
+                _logger.LogError("Regex processing failed due to invalid pattern or input: {Exception}", ex.ToString());
+                TempData["RegexError"] = "Regex processing failed due to invalid pattern or input.";
                 return RedirectToPage();
             }
+            catch (RegexMatchTimeoutException ex)
+            {
+                // Handle regex timeout
+                _logger.LogError("Regex processing timed out: {Exception}", ex.ToString());
+                TempData["RegexError"] = "Regex processing timed out.";
+                return RedirectToPage();
+            }
         }
 
         public IActionResult OnPostTestLogging(string logMessage)
EOF
@@ -38,13 +38,20 @@

return RedirectToPage();
}
catch (Exception ex)
catch (ArgumentException ex)
{
// SECURITY ISSUE: Exposing exception details in logs without sanitization
_logger.LogError("Regex processing failed: {Exception}", ex.ToString());
TempData["RegexError"] = $"Regex processing failed: {ex.Message}";
// Handle invalid regex pattern or input
_logger.LogError("Regex processing failed due to invalid pattern or input: {Exception}", ex.ToString());
TempData["RegexError"] = "Regex processing failed due to invalid pattern or input.";
return RedirectToPage();
}
catch (RegexMatchTimeoutException ex)
{
// Handle regex timeout
_logger.LogError("Regex processing timed out: {Exception}", ex.ToString());
TempData["RegexError"] = "Regex processing timed out.";
return RedirectToPage();
}
}

public IActionResult OnPostTestLogging(string logMessage)
Copilot is powered by AI and may make mistakes. Always verify output.
}

public IActionResult OnPostTestLogging(string logMessage)
{
try
{
// SECURITY ISSUE: Log forging vulnerability - user input directly written to logs
// Malicious input like "Normal log\r\n[ADMIN] Unauthorized access granted"
// could inject fake log entries
_logger.LogInformation("User action: {Message}", logMessage);
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This logging implementation is vulnerable to log forging attacks. User input is directly logged without sanitization, allowing attackers to inject fake log entries by including newline characters and control sequences.

Suggested change
_logger.LogInformation("User action: {Message}", logMessage);
var sanitizedLogMessage = SanitizeForLog(logMessage);
_logger.LogInformation("User action: {Message}", sanitizedLogMessage);

Copilot uses AI. Check for mistakes.

// SECURITY ISSUE: Hardcoded credentials for demo purposes
var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";

Check warning on line 60 in src/webapp01/Pages/DevSecOps3.cshtml.cs

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The variable 'connectionString' is assigned but its value is never used

Check warning on line 60 in src/webapp01/Pages/DevSecOps3.cshtml.cs

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GitHub Actions / Build Web App 

The variable 'connectionString' is assigned but its value is never used

Check warning

Code scanning / CodeQL

Useless assignment to local variable Warning

This assignment to
connectionString
Loading
is useless, since its value is never read.

Copilot Autofix

AI 2 months ago

To fix the problem, simply remove the assignment to the connectionString variable on line 60, as it is never used. This will clean up the code and eliminate the useless assignment. No other changes are necessary, as the removal does not affect any other logic or functionality in the method. No new imports, methods, or definitions are required.

Suggested changeset 1
src/webapp01/Pages/DevSecOps3.cshtml.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/src/webapp01/Pages/DevSecOps3.cshtml.cs b/src/webapp01/Pages/DevSecOps3.cshtml.cs
--- a/src/webapp01/Pages/DevSecOps3.cshtml.cs
+++ b/src/webapp01/Pages/DevSecOps3.cshtml.cs
@@ -57,7 +57,6 @@
                 _logger.LogInformation("User action: {Message}", logMessage);
                 
                 // SECURITY ISSUE: Hardcoded credentials for demo purposes
-                var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";
                 
                 // SECURITY ISSUE: Potential SQL injection if this were used in actual queries
                 var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";
EOF
@@ -57,7 +57,6 @@
_logger.LogInformation("User action: {Message}", logMessage);

// SECURITY ISSUE: Hardcoded credentials for demo purposes
var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";

// SECURITY ISSUE: Potential SQL injection if this were used in actual queries
var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";
Copilot is powered by AI and may make mistakes. Always verify output.
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Copilot AI Aug 21, 2025

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Hardcoded database credentials pose a serious security risk. Credentials should be stored in secure configuration, environment variables, or a secrets management system, never in source code.

Suggested change
var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";
// FIX: Load connection string from environment variable instead of hardcoding
var connectionString = Environment.GetEnvironmentVariable("DB_CONNECTION_STRING");

Copilot uses AI. Check for mistakes.

// SECURITY ISSUE: Potential SQL injection if this were used in actual queries
var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";

Check warning

Code scanning / CodeQL

Useless assignment to local variable Warning

This assignment to
sqlQuery
Loading
is useless, since its value is never read.

Copilot Autofix

AI 2 months ago

To fix the problem, simply remove the assignment to the local variable sqlQuery on line 63 in the OnPostTestLogging method of DevSecOps3.cshtml.cs. Since the value is never read and the assignment has no side effects, it is safe to delete this line. No additional imports, methods, or definitions are required. Only the single line should be removed, and no other changes are necessary.

Suggested changeset 1
src/webapp01/Pages/DevSecOps3.cshtml.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/src/webapp01/Pages/DevSecOps3.cshtml.cs b/src/webapp01/Pages/DevSecOps3.cshtml.cs
--- a/src/webapp01/Pages/DevSecOps3.cshtml.cs
+++ b/src/webapp01/Pages/DevSecOps3.cshtml.cs
@@ -60,7 +60,6 @@
                 var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";
                 
                 // SECURITY ISSUE: Potential SQL injection if this were used in actual queries
-                var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";
                 
                 // SECURITY ISSUE: Using both JSON libraries unnecessarily (dependency confusion risk)
                 var jsonData = JsonConvert.SerializeObject(new { message = logMessage, timestamp = DateTime.Now });
EOF
@@ -60,7 +60,6 @@
var connectionString = "Server=localhost;Database=TestDB;User Id=admin;Password=Password123!;";

// SECURITY ISSUE: Potential SQL injection if this were used in actual queries
var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";

// SECURITY ISSUE: Using both JSON libraries unnecessarily (dependency confusion risk)
var jsonData = JsonConvert.SerializeObject(new { message = logMessage, timestamp = DateTime.Now });
Copilot is powered by AI and may make mistakes. Always verify output.
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Copilot AI Aug 21, 2025

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This string concatenation creates a SQL injection vulnerability. User input is directly embedded in the SQL query without parameterization, allowing attackers to execute arbitrary SQL commands.

Suggested change
var sqlQuery = $"INSERT INTO Logs (Message) VALUES ('{logMessage}')";
// FIXED: Use parameterized query to prevent SQL injection
var sqlQuery = "INSERT INTO Logs (Message) VALUES (@Message)";
using (var command = new SqlCommand(sqlQuery))
{
command.Parameters.AddWithValue("@Message", logMessage ?? string.Empty);
// Note: In this demo, the command is not executed.
}

Copilot uses AI. Check for mistakes.

// SECURITY ISSUE: Using both JSON libraries unnecessarily (dependency confusion risk)
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Using both Newtonsoft.Json and System.Text.Json libraries for the same functionality violates the DRY principle and creates unnecessary dependencies. Choose one JSON library and use it consistently throughout the application.

Copilot uses AI. Check for mistakes.
var jsonData = JsonConvert.SerializeObject(new { message = logMessage, timestamp = DateTime.Now });
var systemJsonData = System.Text.Json.JsonSerializer.Serialize(new { message = logMessage, timestamp = DateTime.Now });

Check warning

Code scanning / CodeQL

Useless assignment to local variable Warning

This assignment to
systemJsonData
Loading
is useless, since its value is never read.

Copilot Autofix

AI 2 months ago

To fix the problem, simply remove the assignment to the unused local variable systemJsonData on line 67. This means deleting the line:

var systemJsonData = System.Text.Json.JsonSerializer.Serialize(new { message = logMessage, timestamp = DateTime.Now });

No other changes are needed, as the value is not used elsewhere. The rest of the method and class remain unchanged. No imports or additional definitions are required.

Suggested changeset 1
src/webapp01/Pages/DevSecOps3.cshtml.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/src/webapp01/Pages/DevSecOps3.cshtml.cs b/src/webapp01/Pages/DevSecOps3.cshtml.cs
--- a/src/webapp01/Pages/DevSecOps3.cshtml.cs
+++ b/src/webapp01/Pages/DevSecOps3.cshtml.cs
@@ -64,7 +64,6 @@
                 
                 // SECURITY ISSUE: Using both JSON libraries unnecessarily (dependency confusion risk)
                 var jsonData = JsonConvert.SerializeObject(new { message = logMessage, timestamp = DateTime.Now });
-                var systemJsonData = System.Text.Json.JsonSerializer.Serialize(new { message = logMessage, timestamp = DateTime.Now });
                 
                 _logger.LogInformation("Serialized data: {JsonData}", jsonData);
                 
EOF
@@ -64,7 +64,6 @@

// SECURITY ISSUE: Using both JSON libraries unnecessarily (dependency confusion risk)
var jsonData = JsonConvert.SerializeObject(new { message = logMessage, timestamp = DateTime.Now });
var systemJsonData = System.Text.Json.JsonSerializer.Serialize(new { message = logMessage, timestamp = DateTime.Now });

_logger.LogInformation("Serialized data: {JsonData}", jsonData);

Copilot is powered by AI and may make mistakes. Always verify output.

_logger.LogInformation("Serialized data: {JsonData}", jsonData);

TempData["LogResult"] = $"Log entry created: '{logMessage}' at {DateTime.Now}";

return RedirectToPage();
}
catch (Exception ex)
{
// SECURITY ISSUE: Excessive error information disclosure
_logger.LogError("Logging operation failed with full exception: {FullException}", ex);
TempData["LogResult"] = $"Logging failed: {ex.Message} - {ex.StackTrace}";
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Exposing full exception details including stack traces to users can reveal sensitive information about the application structure, file paths, and internal implementation details that could aid attackers.

Suggested change
TempData["LogResult"] = $"Logging failed: {ex.Message} - {ex.StackTrace}";
TempData["LogResult"] = "Logging failed due to an internal error. Please contact support if the problem persists.";

Copilot uses AI. Check for mistakes.
return RedirectToPage();
}
Comment on lines +75 to +81

Check notice

Code scanning / CodeQL

Generic catch clause Note

Generic catch clause.

Copilot Autofix

AI 2 months ago

To fix the problem, replace the generic catch (Exception ex) clause with more specific exception types that are likely to be thrown in the try block. For the code in OnPostTestLogging, the most relevant exceptions are:

  • ArgumentException (for invalid arguments to logging or string formatting)
  • JsonException (for serialization errors from System.Text.Json)
  • Newtonsoft.Json.JsonException (for serialization errors from Newtonsoft.Json)
  • SqlException (if database operations were actually performed, but in this code, the query is only constructed, not executed)

Since the code does not actually execute the SQL query, SqlException is not needed. The most relevant exceptions are ArgumentException, JsonException, and Newtonsoft.Json.JsonException. You should add multiple catch blocks for these exceptions. For any other unexpected exceptions, you can optionally add a final generic catch block that logs less detailed information, or simply let them propagate.

Required changes:

  • Replace the generic catch block with multiple specific catch blocks for the exceptions mentioned above.
  • Add necessary using directives if not already present (e.g., for System.Text.Json and Newtonsoft.Json exceptions).
  • Ensure that the error handling logic remains the same for each specific exception.
Suggested changeset 1
src/webapp01/Pages/DevSecOps3.cshtml.cs

Autofix patch

Autofix patch
Run the following command in your local git repository to apply this patch
cat << 'EOF' | git apply
diff --git a/src/webapp01/Pages/DevSecOps3.cshtml.cs b/src/webapp01/Pages/DevSecOps3.cshtml.cs
--- a/src/webapp01/Pages/DevSecOps3.cshtml.cs
+++ b/src/webapp01/Pages/DevSecOps3.cshtml.cs
@@ -72,13 +72,24 @@
                 
                 return RedirectToPage();
             }
-            catch (Exception ex)
+            catch (ArgumentException ex)
             {
-                // SECURITY ISSUE: Excessive error information disclosure
-                _logger.LogError("Logging operation failed with full exception: {FullException}", ex);
-                TempData["LogResult"] = $"Logging failed: {ex.Message} - {ex.StackTrace}";
+                _logger.LogError("Logging operation failed due to invalid argument: {Exception}", ex);
+                TempData["LogResult"] = $"Logging failed: {ex.Message}";
                 return RedirectToPage();
             }
+            catch (System.Text.Json.JsonException ex)
+            {
+                _logger.LogError("Logging operation failed during System.Text.Json serialization: {Exception}", ex);
+                TempData["LogResult"] = $"Logging failed: {ex.Message}";
+                return RedirectToPage();
+            }
+            catch (Newtonsoft.Json.JsonException ex)
+            {
+                _logger.LogError("Logging operation failed during Newtonsoft.Json serialization: {Exception}", ex);
+                TempData["LogResult"] = $"Logging failed: {ex.Message}";
+                return RedirectToPage();
+            }
         }
 
         // SECURITY ISSUE: Method with potential for misuse if exposed
EOF
@@ -72,13 +72,24 @@

return RedirectToPage();
}
catch (Exception ex)
catch (ArgumentException ex)
{
// SECURITY ISSUE: Excessive error information disclosure
_logger.LogError("Logging operation failed with full exception: {FullException}", ex);
TempData["LogResult"] = $"Logging failed: {ex.Message} - {ex.StackTrace}";
_logger.LogError("Logging operation failed due to invalid argument: {Exception}", ex);
TempData["LogResult"] = $"Logging failed: {ex.Message}";
return RedirectToPage();
}
catch (System.Text.Json.JsonException ex)
{
_logger.LogError("Logging operation failed during System.Text.Json serialization: {Exception}", ex);
TempData["LogResult"] = $"Logging failed: {ex.Message}";
return RedirectToPage();
}
catch (Newtonsoft.Json.JsonException ex)
{
_logger.LogError("Logging operation failed during Newtonsoft.Json serialization: {Exception}", ex);
TempData["LogResult"] = $"Logging failed: {ex.Message}";
return RedirectToPage();
}
}

// SECURITY ISSUE: Method with potential for misuse if exposed
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}

// SECURITY ISSUE: Method with potential for misuse if exposed
private void ProcessSensitiveData(string userData)
{
// SECURITY ISSUE: No input validation or sanitization
var processedData = userData.ToUpper();

// SECURITY ISSUE: Logging sensitive data without redaction
_logger.LogInformation("Processing sensitive data: {SensitiveData}", processedData);
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Logging sensitive data without redaction or masking creates a security risk. Sensitive information should be masked, hashed, or excluded from logs to prevent data exposure through log files.

Suggested change
_logger.LogInformation("Processing sensitive data: {SensitiveData}", processedData);
// Mask sensitive data before logging
var maskedData = MaskSensitiveData(processedData);
_logger.LogInformation("Processing sensitive data: {SensitiveData}", maskedData);

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// SECURITY ISSUE: Hardcoded secret key
var secretKey = "MySecretKey123!@#";
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Hardcoded secret keys in source code create serious security vulnerabilities. Secret keys should be stored in secure configuration systems, environment variables, or key management services.

Suggested change
var secretKey = "MySecretKey123!@#";
// Retrieve secret key from environment variable for security
var secretKey = Environment.GetEnvironmentVariable("MY_SECRET_KEY");

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// SECURITY ISSUE: Weak encryption simulation
var encodedData = Convert.ToBase64String(System.Text.Encoding.UTF8.GetBytes(processedData + secretKey));

_logger.LogInformation("Encoded result: {EncodedData}", encodedData);
}
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Base64 encoding is not encryption and provides no security. This creates a false sense of security while exposing sensitive data. Use proper cryptographic functions with secure algorithms for data protection.

Suggested change
}
// _logger.LogInformation("Processing sensitive data: {SensitiveData}", processedData); // Avoid logging sensitive data in plaintext
// SECURITY ISSUE: Hardcoded secret key (for demo only; use secure key management in production)
var key = System.Text.Encoding.UTF8.GetBytes("0123456789ABCDEF0123456789ABCDEF"); // 32 bytes for AES-256
var iv = System.Text.Encoding.UTF8.GetBytes("ABCDEF0123456789"); // 16 bytes for AES
// Use AES encryption instead of Base64 encoding
var encryptedData = EncryptStringToBytes_Aes(processedData, key, iv);
var encodedData = Convert.ToBase64String(encryptedData);
_logger.LogInformation("Encrypted result (Base64): {EncodedData}", encodedData);
}
// Helper method for AES encryption
private static byte[] EncryptStringToBytes_Aes(string plainText, byte[] Key, byte[] IV)
{
if (plainText == null || plainText.Length <= 0)
throw new ArgumentNullException(nameof(plainText));
if (Key == null || Key.Length <= 0)
throw new ArgumentNullException(nameof(Key));
if (IV == null || IV.Length <= 0)
throw new ArgumentNullException(nameof(IV));
using (Aes aesAlg = Aes.Create())
{
aesAlg.Key = Key;
aesAlg.IV = IV;
ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);
using (var msEncrypt = new System.IO.MemoryStream())
{
using (var csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write))
using (var swEncrypt = new System.IO.StreamWriter(csEncrypt))
{
swEncrypt.Write(plainText);
}
return msEncrypt.ToArray();
}
}
}

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}
}
4 changes: 4 additions & 0 deletions src/webapp01/Pages/Index.cshtml
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Expand Up @@ -13,5 +13,9 @@
<strong>New!</strong> Check out our <a asp-page="/DevSecOps" class="btn btn-primary btn-sm">DevSecOps Demo</a>
page to see the latest GHAS features and security demonstrations.
</p>
<p class="card-text">
<strong>Latest!</strong> Explore our brand new <a asp-page="/DevSecOps3" class="btn btn-success btn-sm">DevSecOps v3 Demo</a>
page featuring the newest GitHub Advanced Security v3 capabilities and enhanced security demonstrations.
</p>
</div>
</div>
3 changes: 3 additions & 0 deletions src/webapp01/Pages/Shared/_Layout.cshtml
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Expand Up @@ -28,6 +28,9 @@
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-page="/DevSecOps">DevSecOps Demo</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-page="/DevSecOps3">DevSecOps v3</a>
</li>
<li class="nav-item">
<a class="nav-link text-dark" asp-area="" asp-page="/Privacy">Privacy</a>
</li>
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2 changes: 1 addition & 1 deletion src/webapp01/webapp01.csproj
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Expand Up @@ -13,7 +13,7 @@
<PackageReference Include="Microsoft.Data.SqlClient" Version="5.0.2" />
<PackageReference Include="Microsoft.VisualStudio.Azure.Containers.Tools.Targets" Version="1.21.0" />
<PackageReference Include="System.Text.Json" Version="8.0.4" />
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
<PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
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Downgrading Newtonsoft.Json from 13.0.1 to 12.0.2 introduces known security vulnerabilities. Version 12.0.2 has documented CVEs that were fixed in later versions. Consider using the latest secure version unless this downgrade is specifically required for the security demonstration.

Suggested change
<PackageReference Include="Newtonsoft.Json" Version="12.0.2" />
<PackageReference Include="Newtonsoft.Json" Version="13.0.1" />

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</ItemGroup>

</Project>
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