Project Walkthrough #125
Project Walkthrough #125
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Pull Request Overview
This PR reorganizes the project structure by updating the namespace for service-related components.
- The namespace for ServiceAttribute has been changed from KCert to KCert.Services.
- This change aligns the file path with the new namespace organization.
![github-advanced-security[bot]](https://avatars.githubusercontent.com/in/57789?s=60&v=4){kind=small}
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| public string HandleChallenge(string token) | ||
| { | ||
| log.LogInformation("Received ACME Challenge: {token}", token); |
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AI 7 months ago
To fix the issue, the token parameter should be sanitized before being logged. Since the logs are likely plain text, we can remove newline characters and other potentially problematic characters from the token string using String.Replace or similar methods. This ensures that malicious input cannot manipulate the log format.
The fix involves modifying the HandleChallenge method in Challenge/HttpChallengeProvider.cs to sanitize the token parameter before logging it. Specifically:
- Replace newline characters (
\nand\r) in thetokenstring with an empty string. - Use the sanitized
tokenin the log statement.
| @@ -14,5 +14,6 @@ | ||
| { | ||
| log.LogInformation("Received ACME Challenge: {token}", token); | ||
| var sanitizedToken = token.Replace("\n", "").Replace("\r", ""); | ||
| log.LogInformation("Received ACME Challenge: {token}", sanitizedToken); | ||
| var thumbprint = cert.GetThumbprint(); | ||
| return $"{token}.{thumbprint}"; | ||
| return $"{sanitizedToken}.{thumbprint}"; | ||
| } |
| await SendAsync(subject, body, tok); | ||
| } | ||
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| private async Task SendAsync(string subject, string text, CancellationToken tok) |
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AI 7 months ago
To fix the issue, the code should avoid including sensitive exception details, such as ex.StackTrace, in the email body. Instead, a generic error message should be sent to the recipients, while logging the detailed exception information on the server for debugging purposes. This ensures that sensitive information is not exposed to external parties while still allowing developers to diagnose issues.
The changes will involve:
- Replacing the inclusion of
ex.StackTraceandex.Messagein the email body with a generic error message. - Logging the detailed exception information using the
logobject for internal use.
| @@ -40,3 +40,4 @@ | ||
| var subject = "KCert encountered an unexpected error"; | ||
| var body = $"{message}\n\n{ex.Message}\n\n{ex.StackTrace}"; | ||
| var body = $"{message}\n\nAn error occurred. Please check the server logs for more details."; | ||
| log.LogError(ex, "An unexpected error occurred: {Message}", message); | ||
| await SendAsync(subject, body, tok); | ||
| @@ -71,3 +72,4 @@ | ||
| lines.Add(string.Join('\n', ex.Logs)); | ||
| lines.Add($"Error:\n\n{ex.Message}\n\n{ex.StackTrace}"); | ||
| lines.Add($"Error:\n\nAn error occurred during renewal. Please check the server logs for more details."); | ||
| log.LogError(ex, "Renewal failed for secret [{SecretNamespace}:{SecretName}]", secretNamespace, secretName); | ||
| } |
| { | ||
| await prev; | ||
| tok.ThrowIfCancellationRequested(); | ||
| log.LogInformation("Starting renewal process for secret {ns}/{secretName} with hosts {hosts}", ns, secretName, string.Join(", ", hosts)); |
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To fix the issue, the ns parameter should be sanitized before being logged. Since the log entries are plain text, newline characters and other potentially problematic characters should be removed from the user input. This can be achieved using String.Replace or similar methods. The sanitization should be applied in the StartRenewalProcessAsync method before logging the ns parameter.
| @@ -35,3 +35,4 @@ | ||
| { | ||
| log.LogInformation("Starting renewal process for secret {ns}/{secretName} with hosts {hosts}", ns, secretName, string.Join(", ", hosts)); | ||
| var sanitizedNs = ns.Replace(Environment.NewLine, "").Replace("\n", "").Replace("\r", ""); | ||
| log.LogInformation("Starting renewal process for secret {sanitizedNs}/{secretName} with hosts {hosts}", sanitizedNs, secretName, string.Join(", ", hosts)); | ||
| await RenewCertAsync(ns, secretName, hosts, tok); |
| { | ||
| await prev; | ||
| tok.ThrowIfCancellationRequested(); | ||
| log.LogInformation("Starting renewal process for secret {ns}/{secretName} with hosts {hosts}", ns, secretName, string.Join(", ", hosts)); |
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AI 7 months ago
To fix the issue, the user-provided secretName should be sanitized before being logged. Since the logs are plain text, newline characters and other potentially problematic characters should be removed or replaced. The String.Replace method can be used to remove newline characters (\n and \r) from the secretName value before logging it.
The fix involves modifying the log.LogInformation call on line 36 of KCertClient.cs to sanitize the secretName value. Specifically:
- Replace newline characters (
\nand\r) insecretNamewith an empty string. - Ensure that the sanitized value is used in the log message.
| @@ -35,3 +35,4 @@ | ||
| { | ||
| log.LogInformation("Starting renewal process for secret {ns}/{secretName} with hosts {hosts}", ns, secretName, string.Join(", ", hosts)); | ||
| var sanitizedSecretName = secretName.Replace("\n", "").Replace("\r", ""); | ||
| log.LogInformation("Starting renewal process for secret {ns}/{secretName} with hosts {hosts}", ns, sanitizedSecretName, string.Join(", ", hosts)); | ||
| await RenewCertAsync(ns, secretName, hosts, tok); |
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