chore(deps): update dependency sqlparse to v0.5.0 [security]

[renovate[bot]]

This PR contains the following updates:

Package	Change	Age	Adoption	Passing	Confidence
sqlparse (changelog)	==0.4.4 -> ==0.5.0

GitHub Vulnerability Alerts

CVE-2024-4340

Summary

Passing a heavily nested list to sqlparse.parse() leads to a Denial of Service due to RecursionError.

Details + PoC

Running the following code will raise Maximum recursion limit exceeded exception:

import sqlparse
sqlparse.parse('[' * 10000 + ']' * 10000)

We expect a traceback of RecursionError:

Traceback (most recent call last):
  File "trigger_sqlparse_nested_list.py", line 3, in <module>
    sqlparse.parse('[' * 10000 + ']' * 10000)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/__init__.py", line 30, in parse
    return tuple(parsestream(sql, encoding))
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/engine/filter_stack.py", line 36, in run
    stmt = grouping.group(stmt)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/engine/grouping.py", line 428, in group
    func(stmt)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/engine/grouping.py", line 53, in group_brackets
    _group_matching(tlist, sql.SquareBrackets)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/engine/grouping.py", line 48, in _group_matching
    tlist.group_tokens(cls, open_idx, close_idx)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 328, in group_tokens
    grp = grp_cls(subtokens)
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 161, in __init__
    super().__init__(None, str(self))
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 165, in __str__
    return ''.join(token.value for token in self.flatten())
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 165, in <genexpr>
    return ''.join(token.value for token in self.flatten())
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 214, in flatten
    yield from token.flatten()
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 214, in flatten
    yield from token.flatten()
  File "/home/uriya/.local/lib/python3.10/site-packages/sqlparse/sql.py", line 214, in flatten
    yield from token.flatten()
  [Previous line repeated 983 more times]
RecursionError: maximum recursion depth exceeded

Fix suggestion

The flatten() function of TokenList class should limit the recursion to a maximal depth:

from sqlparse.exceptions import SQLParseError

MAX_DEPTH = 100

    def flatten(self, depth=1):
        """Generator yielding ungrouped tokens.

        This method is recursively called for all child tokens.
        """
    if depth >= MAX_DEPTH:
        raise SQLParseError('Maximal depth reached')
        for token in self.tokens:
            if token.is_group:
                yield from token.flatten(depth + 1)
            else:
                yield token

Impact

Denial of Service (the impact depends on the use). Anyone parsing a user input with sqlparse.parse() is affected.

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Release Notes

andialbrecht/sqlparse (sqlparse)

v0.5.0

Compare Source

Notable Changes

• Drop support for Python 3.5, 3.6, and 3.7.
• Python 3.12 is now supported (pr725, by hugovk).
• IMPORTANT: Fixes a potential denial of service attack (DOS) due to recursion error for deeply nested statements. Instead of recursion error a generic SQLParseError is raised. See the security advisory for details: https://github.com/andialbrecht/sqlparse/security/advisories/GHSA-2m57-hf25-phgg The vulnerability was discovered by @​uriyay-jfrog. Thanks for reporting!

Enhancements:

• Splitting statements now allows to remove the semicolon at the end. Some database backends love statements without semicolon (issue742).
• Support TypedLiterals in get_parameters (pr649, by Khrol).
• Improve splitting of Transact SQL when using GO keyword (issue762).
• Support for some JSON operators (issue682).
• Improve formatting of statements containing JSON operators (issue542).
• Support for BigQuery and Snowflake keywords (pr699, by griffatrasgo).
• Support parsing of OVER clause (issue701, pr768 by r33s3n6).

Bug Fixes

• Ignore dunder attributes when creating Tokens (issue672).
• Allow operators to precede dollar-quoted strings (issue763).
• Fix parsing of nested order clauses (issue745, pr746 by john-bodley).
• Thread-safe initialization of Lexer class (issue730).
• Classify TRUNCATE as DDL and GRANT/REVOKE as DCL keywords (based on pr719 by josuc1, thanks for bringing this up!).
• Fix parsing of PRIMARY KEY (issue740).

Other

• Optimize performance of matching function (pr799, by admachainz).

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