GeezerVison is showing github.com — Reject SQL queries containing null characters by ever0de · Pull Request #5981 · RustPython/RustPython
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ever0de
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Jul 15, 2025
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edited by coderabbitai
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Summary by CodeRabbit
- Bug Fixes
- Improved validation for SQL statements to detect and reject any statements containing null characters, providing clearer error messages when such cases occur.
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coderabbitai
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Jul 15, 2025
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edited
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Walkthrough
A validation step was added to the Statement::new function in the SQLite module, ensuring that SQL statement strings containing null ('\0') characters are detected and rejected with a ProgrammingError. This check is performed after UTF-8 conversion and before further processing.
Changes
| File(s) |
Change Summary |
| stdlib/src/sqlite.rs |
Added a check in Statement::new to reject SQL strings with null chars. |
Sequence Diagram(s)
sequenceDiagram
participant Caller
participant Statement
participant Error
Caller->>Statement: new(sql_string)
Statement->>Statement: Convert sql_string to UTF-8
Statement->>Statement: Check for null ('\0') character
alt Null character found
Statement->>Error: Return ProgrammingError("statement contains a null character")
else No null character
Statement->>Statement: Proceed to C string conversion and statement preparation
end
Statement-->>Caller: Return result (Statement or Error)
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Poem
In the land of code where queries dwell,
A sneaky null char tried to cast its spell.
But now, with a check both sharp and bright,
No phantom bytes escape our sight!
🐇✨
Bugs beware—your tricks won't fare!
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📥 Commits
Reviewing files that changed from the base of the PR and between a54873d and 062278e.
⛔ Files ignored due to path filters (1)
Lib/test/test_sqlite3/test_regression.py is excluded by !Lib/**
📒 Files selected for processing (1)
stdlib/src/sqlite.rs (1 hunks)
🧰 Additional context used
📓 Path-based instructions (1)
**/*.rs
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🔇 Additional comments (1)
stdlib/src/sqlite.rs (1)
2298-2303: LGTM! Excellent security improvement that aligns with CPython behavior.
This validation correctly prevents SQL injection vulnerabilities that could arise from embedded null characters truncating SQL statements when converted to C strings. The check is well-positioned after UTF-8 conversion and before C string conversion, providing early failure with an appropriate ProgrammingError.
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