GHSA-6qh9-h6wf-jgqc Symfony Vulnerable to SQL Injection in PdoAdapter::doClear() via Unsanitized $prefix

• Packagist symfony/cache: < 5.4.52 → fixed in 5.4.52 • Packagist symfony/cache: >= 6.0.0, < 6.4.40 → fixed in 6.4.40 • Packagist symfony/cache: >= 7.0.0, < 7.4.12 → fixed in 7.4.12 • Packagist symfony/cache: >= 8.0.0, < 8.0.12 → fixed in 8.0.12 • Packagist symfony/symfony: < 5.4.52 → fixed in 5.4.52 • Packagist symfony/symfony: >= 6.0.0, < 6.4.40 → fixed in 6.4.40 • Packagist symfony/symfony: >= 7.0.0, < 7.4.12 → fixed in 7.4.12 • Packagist symfony/symfony: >= 8.0.0, < 8.0.12 → fixed in 8.0.12

Description `Symfony\Component\Cache\Adapter\PdoAdapter` is the PDO-backed cache adapter. Its `clear($prefix)` method (inherited from `AbstractAdapterTrait`) is documented to delete cache items whose key starts with `$prefix`. In the non-versioning code path, the caller-supplied `$prefix` is concatenated into `$namespace = $this->namespace.$prefix` and passed to `PdoAdapter::doClear()`, which builds: ```sql DELETE FROM WHERE LIKE '%' ``` The value is interpolated directly into the SQL text and executed with `PDO::exec()`: `$namespace` is not bound. A caller able to influence `$prefix` can break out of the literal and inject SQL, expanding deletion scope from the intended prefix to arbitrary rows, or otherwise reshape query semantics. Most applications don't expose `clear($prefix)` to untrusted input directly, but the contract of the method is to safely accept any prefix string, so the lack of escaping is a defect of the adapter itself. Resolution `AbstractAdapterTrait::clear()` now rejects any `$prefix` containing characters outside `[-+.A-Za-z0-9]`: when an invalid prefix is supplied, the method logs a warning and returns `false` instead of reaching the SQL layer. This blocks quotes, `%`, null bytes and other characters that would let an attacker break out of the `LIKE` literal. The patch for this issue is available here for branch 5.4. Credits Symfony would like to thank secsys_codex for reporting the issue and Nicolas Grekas for fixing it.