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Add security rules for detecting hard-coded secrets in C# and Python #98

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Add security rules for detecting hard-coded secrets in C# and Python #98

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7e4aabb
python-pymssql-hardcoded-secret-python
Dec 7, 2024
514d16c
python-pymysql-empty-password-python
Dec 7, 2024
4d92264
oracleconnectionstringbuilder-hardcoded-secret-csharp
Dec 7, 2024
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247 changes: 247 additions & 0 deletions rules/csharp/security/oracleconnectionstringbuilder-hardcoded-secret-csharp.yml
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Original file line number Diff line number Diff line change
@@ -0,0 +1,247 @@
id: oracleconnectionstringbuilder-hardcoded-secret-csharp
language: csharp
severity: warning
message: >-
A secret is hard-coded in the application. Secrets stored in source
code, such as credentials, identifiers, and other types of sensitive data,
can be leaked and used by internal or external malicious actors. Use
environment variables to securely provide credentials and other secrets or
retrieve them from a secure vault or Hardware Security Module (HSM).
note: >-
[CWE-798]: Use of Hard-coded Credentials
[OWASP A07:2021]: Identification and Authentication Failures
[REFERENCES]
https://cheatsheetseries.owasp.org/cheatsheets/Secrets_Management_Cheat_Sheet.html
utils:
match_assignment_without_brackets:
kind: assignment_expression
all:
- has:
stopBy: end
kind: member_access_expression
all:
- has:
stopBy: end
kind: identifier
field: expression
pattern: $B
- has:
stopBy: end
kind: identifier
field: name
regex: "^Password$"
- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content
inside:
stopBy: end
kind: expression_statement
follows:
stopBy: end
kind: local_declaration_statement
all:
- has:
stopBy: end
kind: variable_declaration
has:
stopBy: end
kind: identifier
field: type
regex: "^OracleConnectionStringBuilder$"
- has:
stopBy: end
kind: variable_declarator
has:
stopBy: end
kind: identifier
pattern: $B
- has:
stopBy: end
kind: object_creation_expression
match_assignment_with_brackets:
kind: assignment_expression
all:
- has:
stopBy: end
kind: element_access_expression
all:
- has:
stopBy: end
kind: identifier
pattern: $B
- has:
stopBy: end
kind: bracketed_argument_list
field: subscript
- has:
stopBy: end
kind: argument
- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content
regex: "^Password$"
all:
- not:
precedes:
stopBy: end
kind: element_access_expression
- not:
precedes:
stopBy: end
kind: invocation_expression

- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content
inside:
stopBy: end
kind: expression_statement
follows:
stopBy: end
kind: local_declaration_statement
all:
- has:
stopBy: end
kind: variable_declaration
has:
stopBy: end
kind: identifier
field: type
regex: "^OracleConnectionStringBuilder$"
- has:
stopBy: end
kind: variable_declarator
has:
stopBy: end
kind: identifier
field: name
pattern: $B
- has:
stopBy: end
kind: object_creation_expression
match_assignment_with_instance_above_with_bracket:
kind: assignment_expression
all:
- has:
stopBy: end
kind: element_access_expression
all:
- has:
stopBy: end
kind: identifier
field: expression
pattern: $N
- has:
stopBy: end
kind: bracketed_argument_list
field: subscript
- has:
stopBy: end
kind: argument
- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content
regex: "^Password$"
all:
- not:
precedes:
stopBy: end
kind: element_access_expression
- not:
precedes:
stopBy: end
kind: invocation_expression
- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content

inside:
stopBy: end
kind: expression_statement
follows:
stopBy: end
kind: local_declaration_statement
all:
- has:
stopBy: end
kind: variable_declaration
has:
stopBy: end
kind: implicit_type
- has:
stopBy: end
kind: variable_declarator
has:
stopBy: end
kind: identifier
pattern: $N
- has:
stopBy: end
kind: object_creation_expression
match_assignment_with_instance_above_without_bracket:
kind: assignment_expression
all:
- has:
stopBy: end
kind: member_access_expression
all:
- has:
stopBy: end
kind: identifier
field: expression
pattern: $N
- has:
stopBy: end
kind: identifier
field: name
regex: "^Password$"
- has:
stopBy: end
kind: string_literal
has:
stopBy: end
kind: string_literal_content
inside:
stopBy: end
kind: expression_statement
follows:
stopBy: end
kind: local_declaration_statement
all:
- has:
stopBy: end
kind: variable_declaration
has:
stopBy: end
kind: implicit_type
- has:
stopBy: end
kind: variable_declarator
has:
stopBy: end
kind: identifier
pattern: $N
- has:
stopBy: end
kind: object_creation_expression
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rule:
any:
- matches: match_assignment_without_brackets
- matches: match_assignment_with_brackets
- matches: match_assignment_with_instance_above_with_bracket
- matches: match_assignment_with_instance_above_without_bracket
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