Semgrep files #56
Semgrep files #56
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WalkthroughThree new files are introduced: a Changes
Poem
Impact AnalysisIntroduction of insecure Python script with hardcoded credentials and arbitrary code execution🚨 Critical 🔒Impacts security 🔄 Impacts behavior A new Python script ( Remove hardcoded credentials in favor of secure secret management, eliminate the use of Conduct security tests to ensure no arbitrary code execution via 🔍 Related Files
Warning There were issues while running some tools. Please review the errors and either fix the tool's configuration or disable the tool if it's a critical failure. 🔧 YAMLlint (1.37.1).coderabbit.yml[Errno 2] No such file or directory: '.coderabbit.yml' semgrep.config.yml[Errno 2] No such file or directory: 'semgrep.config.yml' ✨ Finishing Touches
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Actionable comments posted: 7
📜 Review details
Configuration used: .coderabbit.yml
Review profile: CHILL
Plan: Pro
📒 Files selected for processing (3)
.coderabbit.yml(1 hunks)bad.py(1 hunks)semgrep.yml(1 hunks)
🔇 Additional comments (1)
.coderabbit.yml (1)
1-4: Configuration looks good and follows the schema correctly.The file inclusion patterns are properly configured to include all YAML files, which will ensure that the
semgrep.ymlrule file is processed by the system.
semgrep.yml
Outdated
| @@ -0,0 +1,8 @@ | |||
| rules: | |||
| - id: hardcoded-password | |||
| pattern: password = "$SECRET" | |||
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🛠️ Refactor suggestion
Improve the pattern to catch more hardcoded password variations.
The current pattern password = "$SECRET" is too specific and will only match that exact literal. Consider using a more flexible pattern to catch various hardcoded password scenarios.
- pattern: password = "$SECRET"
+ pattern-either:
+ - pattern: password = "..."
+ - pattern: PASSWORD = "..."
+ - pattern: $VAR = "..."
+ where:
+ - variable: $VAR
+ regex: ".*[Pp]assword.*"This would catch more realistic hardcoded password patterns while maintaining the security focus of the rule.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| pattern: password = "$SECRET" | |
| pattern-either: | |
| - pattern: password = "..." | |
| - pattern: PASSWORD = "..." | |
| - pattern: $VAR = "..." | |
| where: | |
| - variable: $VAR | |
| regex: ".*[Pp]assword.*" |
🤖 Prompt for AI Agents
In semgrep.yml at line 3, the pattern 'password = "$SECRET"' is too specific and
only matches that exact string. Update the pattern to use a more flexible
matching syntax, such as a regex or wildcard, to detect various hardcoded
password assignments, for example by matching any string assigned to a variable
named password. This will broaden the detection scope to catch more realistic
hardcoded password cases.
|
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||
| dangerous_eval() | ||
|
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||
| main() |
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🛠️ Refactor suggestion
Consider adding proper entry point protection.
The script executes immediately when imported, which can cause issues in testing or when used as a module.
-main()
+if __name__ == "__main__":
+ main()📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| main() | |
| if __name__ == "__main__": | |
| main() |
🤖 Prompt for AI Agents
In bad.py at line 31, the script calls main() directly, causing it to execute
upon import. To fix this, wrap the main() call inside a standard Python entry
point check by adding if __name__ == "__main__": before calling main(). This
ensures the script only runs when executed directly, not when imported as a
module.
| USERNAME = "admin" | ||
| PASSWORD = "secret123" |
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Critical security issue: Hardcoded credentials detected.
Hardcoded credentials pose a significant security risk as they can be easily discovered in source code and cannot be rotated without code changes.
-USERNAME = "admin"
-PASSWORD = "secret123"
+# Use environment variables or secure configuration management
+USERNAME = os.getenv("APP_USERNAME")
+PASSWORD = os.getenv("APP_PASSWORD")📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| USERNAME = "admin" | |
| PASSWORD = "secret123" | |
| # Use environment variables or secure configuration management | |
| USERNAME = os.getenv("APP_USERNAME") | |
| PASSWORD = os.getenv("APP_PASSWORD") |
🤖 Prompt for AI Agents
In bad.py around lines 6 to 7, the USERNAME and PASSWORD are hardcoded, which is
a critical security risk. Remove these hardcoded credentials and instead load
them securely from environment variables or a secure secrets manager. Update the
code to read USERNAME and PASSWORD from these external sources to allow secure
credential management and rotation without code changes.
| def hash_password(password): | ||
| hashed = hashlib.md5(password.encode()).hexdigest() # Semgrep: weak hash | ||
| return hashed |
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Security issue: Weak cryptographic hashing algorithm.
MD5 is cryptographically broken and should not be used for password hashing. Use a proper password hashing library instead.
-def hash_password(password):
- hashed = hashlib.md5(password.encode()).hexdigest() # Semgrep: weak hash
- return hashed
+def hash_password(password):
+ import bcrypt
+ # Use bcrypt for secure password hashing
+ salt = bcrypt.gensalt()
+ hashed = bcrypt.hashpw(password.encode('utf-8'), salt)
+ return hashed📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def hash_password(password): | |
| hashed = hashlib.md5(password.encode()).hexdigest() # Semgrep: weak hash | |
| return hashed | |
| def hash_password(password): | |
| import bcrypt | |
| # Use bcrypt for secure password hashing | |
| salt = bcrypt.gensalt() | |
| hashed = bcrypt.hashpw(password.encode('utf-8'), salt) | |
| return hashed |
🤖 Prompt for AI Agents
In bad.py around lines 17 to 19, the function uses MD5 for hashing passwords,
which is insecure. Replace the MD5 hashing with a secure password hashing
library such as bcrypt or Argon2. Update the function to use the chosen
library's hashing method and ensure the password is hashed with a strong,
adaptive algorithm designed for password storage.
| if len(sys.argv) > 1: | ||
| delete_data(sys.argv[1]) |
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Security issue: Unsafe command line argument handling.
Directly passing command line arguments to potentially dangerous functions without validation creates security risks.
- if len(sys.argv) > 1:
- delete_data(sys.argv[1])
+ if len(sys.argv) > 1:
+ path = sys.argv[1]
+ # Validate the path before processing
+ if validate_path(path):
+ delete_data(path)
+ else:
+ print("Error: Invalid path provided")Committable suggestion skipped: line range outside the PR's diff.
🤖 Prompt for AI Agents
In bad.py around lines 26 to 27, the code directly passes a command line
argument to the delete_data function without any validation, posing a security
risk. To fix this, add proper validation or sanitization of sys.argv[1] before
passing it to delete_data, ensuring it meets expected criteria and does not
contain harmful input.
| def delete_data(path): | ||
| os.system("rm -rf " + path) # Semgrep: shell injection |
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Critical security vulnerability: Shell injection detected.
Direct concatenation of user input into shell commands allows command injection attacks.
-def delete_data(path):
- os.system("rm -rf " + path) # Semgrep: shell injection
+def delete_data(path):
+ import shutil
+ # Validate and sanitize the path
+ if os.path.exists(path) and os.path.abspath(path).startswith('/safe/directory/'):
+ shutil.rmtree(path)
+ else:
+ raise ValueError("Invalid or unsafe path")📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def delete_data(path): | |
| os.system("rm -rf " + path) # Semgrep: shell injection | |
| def delete_data(path): | |
| import shutil | |
| # Validate and sanitize the path | |
| if os.path.exists(path) and os.path.abspath(path).startswith('/safe/directory/'): | |
| shutil.rmtree(path) | |
| else: | |
| raise ValueError("Invalid or unsafe path") |
🤖 Prompt for AI Agents
In bad.py around lines 14 to 15, the function delete_data uses os.system with
direct string concatenation of the path argument, which creates a shell
injection vulnerability. To fix this, avoid using os.system with concatenated
strings; instead, use the subprocess module with a list of arguments or use
Python's built-in file operations to safely delete files or directories without
invoking the shell.
| def dangerous_eval(): | ||
| user_input = input("Enter a Python expression: ") | ||
| result = eval(user_input) | ||
| print("Evaluated result:", result) |
There was a problem hiding this comment.
Critical security vulnerability: Code injection via eval().
Using eval() on user input allows arbitrary code execution, which is a severe security vulnerability that can lead to system compromise.
-def dangerous_eval():
- user_input = input("Enter a Python expression: ")
- result = eval(user_input)
- print("Evaluated result:", result)
+def safe_calculation():
+ try:
+ user_input = input("Enter a mathematical expression: ")
+ # Use ast.literal_eval() for safe evaluation of literals only
+ # or implement a proper expression parser
+ result = ast.literal_eval(user_input)
+ print("Evaluated result:", result)
+ except (ValueError, SyntaxError) as e:
+ print("Invalid input:", e)📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| def dangerous_eval(): | |
| user_input = input("Enter a Python expression: ") | |
| result = eval(user_input) | |
| print("Evaluated result:", result) | |
| def safe_calculation(): | |
| try: | |
| user_input = input("Enter a mathematical expression: ") | |
| # Use ast.literal_eval() for safe evaluation of literals only | |
| # or implement a proper expression parser | |
| result = ast.literal_eval(user_input) | |
| print("Evaluated result:", result) | |
| except (ValueError, SyntaxError) as e: | |
| print("Invalid input:", e) |
🤖 Prompt for AI Agents
In bad.py around lines 9 to 12, the use of eval() on user input creates a
critical security vulnerability by allowing arbitrary code execution. Replace
eval() with a safer alternative such as ast.literal_eval() if evaluating
expressions, or implement strict input validation and parsing to avoid executing
arbitrary code. Ensure that user input is never directly executed as code.
|
@coderabbitai full review |
✅ Actions performedFull review triggered. |
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Actionable comments posted: 2
♻️ Duplicate comments (6)
bad.py (6)
6-7: Critical security issue: Hardcoded credentials detected.The hardcoded credentials pose a significant security risk. These should be loaded from environment variables or a secure configuration system.
9-12: Critical security vulnerability: Code injection via eval().Using
eval()on user input allows arbitrary code execution. Replace withast.literal_eval()or implement proper input validation.
14-15: Critical security vulnerability: Shell injection detected.Direct string concatenation in shell commands enables command injection attacks. Use
subprocesswith proper argument lists or Python's built-in file operations instead.
17-19: Security issue: Weak cryptographic hashing algorithm.MD5 is cryptographically broken. Use bcrypt, scrypt, or Argon2 for password hashing.
26-27: Security issue: Unsafe command line argument handling.Command line arguments should be validated before use in potentially dangerous operations.
31-31: Consider adding proper entry point protection.The script executes immediately when imported. Use
if __name__ == "__main__":guard.
| files: | ||
| include: | ||
| - "**/*.yml" | ||
| - "**/*.yaml" |
There was a problem hiding this comment.
Invalid CodeRabbit configuration structure
The files property is not a valid top-level configuration option according to the CodeRabbit schema. Valid top-level properties include language, tone_instructions, early_access, enable_free_tier, reviews, chat, knowledge_base, and code_generation.
If you're trying to configure file filtering for reviews, use the reviews.path_filters property instead:
-files:
- include:
- - "**/*.yml"
- - "**/*.yaml"
+reviews:
+ path_filters:
+ - "**/*.yml"
+ - "**/*.yaml"🤖 Prompt for AI Agents
In the .coderabbit.yml file at lines 1 to 4, the top-level 'files' property is
invalid according to the CodeRabbit schema. To fix this, remove the 'files'
property and instead configure file filtering under the 'reviews.path_filters'
property by moving the include patterns there. Ensure the configuration uses
only valid top-level properties like 'language', 'tone_instructions', 'reviews',
etc.
| rules: | ||
| - id: hardcoded-password | ||
| pattern: password = "$SECRET" | ||
| message: "Avoid hardcoded passwords" | ||
| severity: ERROR | ||
| languages: [python] | ||
| metadata: | ||
| category: security |
There was a problem hiding this comment.
🛠️ Refactor suggestion
Improve the hardcoded password detection pattern
The current pattern password = "$SECRET" is too specific and won't detect the actual hardcoded password in bad.py (PASSWORD = "secret123"). Consider using a more comprehensive pattern:
rules:
- id: hardcoded-password
- pattern: password = "$SECRET"
+ patterns:
+ - pattern-either:
+ - pattern: $VAR = "..."
+ - pattern: $VAR = '...'
+ - metavariable-regex:
+ metavariable: $VAR
+ regex: '(?i)(password|passwd|pwd|pass|secret|api_key|apikey|auth|token)(_|$)'
+ - pattern-not: $VAR = None
+ - pattern-not: $VAR = ""
message: "Avoid hardcoded passwords"
severity: ERROR
languages: [python]
metadata:
category: securityThis enhanced pattern will catch various forms of hardcoded credentials including the ones in bad.py.
📝 Committable suggestion
‼️ IMPORTANT
Carefully review the code before committing. Ensure that it accurately replaces the highlighted code, contains no missing lines, and has no issues with indentation. Thoroughly test & benchmark the code to ensure it meets the requirements.
| rules: | |
| - id: hardcoded-password | |
| pattern: password = "$SECRET" | |
| message: "Avoid hardcoded passwords" | |
| severity: ERROR | |
| languages: [python] | |
| metadata: | |
| category: security | |
| rules: | |
| - id: hardcoded-password | |
| patterns: | |
| - pattern-either: | |
| - pattern: $VAR = "..." | |
| - pattern: $VAR = '...' | |
| - metavariable-regex: | |
| metavariable: $VAR | |
| regex: '(?i)(password|passwd|pwd|pass|secret|api_key|apikey|auth|token)(_|$)' | |
| - pattern-not: $VAR = None | |
| - pattern-not: $VAR = "" | |
| message: "Avoid hardcoded passwords" | |
| severity: ERROR | |
| languages: [python] | |
| metadata: | |
| category: security |
🤖 Prompt for AI Agents
In semgrep.config.yml lines 1 to 8, the current pattern for detecting hardcoded
passwords is too specific and misses cases like PASSWORD = "secret123". Update
the pattern to a more general one that matches any assignment to variables named
password or similar with string literals, covering different cases and
variations. This will improve detection of hardcoded credentials in Python code.
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