Affecting symfony/http-kernel package, versions >=2.8.0, <2.8.52 || >=3.4.0, <3.4.35 || >=4.2.0, <4.2.12 || >=4.3.0, <4.3.8
symfony/http-kernel is a Symfony component that provides a structured process for converting a Request into a Response.
Affected versions of this package are vulnerable to Timing Attack. When checking the signature of an URI (an ESI fragment URL for instance), the URISigner does not use a constant time string comparison function, resulting in a potential remote timing attack vulnerability.
symfony/http-kernel to version 2.8.52, 3.4.35, 4.2.12, 4.3.8 or higher.