Symfony is a PHP framework for web and console applications and a set of reusable PHP components. Prior to 5.4.52, 6.4.40, 7.4.12, and 8.0.12, when the parser is exposed to attacker-controlled input, deeply nested mappings or sequences cause both the block-level (Parser::parseBlock()) and inline (Inline::parseSequence() / Inline::parseMapping()) parsers to recurse without a depth limit. A crafted document exhausts the PHP stack and crashes the worker. This issue is fixed in versions 5.4.52, 6.4.40, 7.4.12, and 8.0.12.
Weakness
The product does not properly control the amount of recursion that takes place, consuming excessive resources, such as allocated memory or the program stack.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Symfony | Sensiolabs | * | 5.4.52 (excluding) |
| Symfony | Sensiolabs | 6.0.0 (including) | 6.4.40 (excluding) |
| Symfony | Sensiolabs | 7.0.0 (including) | 7.4.12 (excluding) |
| Symfony | Sensiolabs | 8.0.0 (including) | 8.0.12 (excluding) |
| Symfony | Ubuntu | questing | * |
| Symfony | Ubuntu | upstream | * |