Symfony: [Yaml] Harden the parser when handling untrusted input
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.2epss 0.7%
exploitation probability
0.7%top 49% of all CVEs
observed exploitation
nono source reports it
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.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
symfony · symfonyReferences
https://github.com/symfony/symfony/releases/tag/v5.4.52https://github.com/symfony/symfony/releases/tag/v6.4.40https://github.com/symfony/symfony/releases/tag/v7.4.12https://github.com/symfony/symfony/releases/tag/v8.0.12https://github.com/symfony/symfony/security/advisories/GHSA-c2p3-7m5p-cv8x