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CVE-2018-19789

An issue was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9, and 4.2.x before 4.2.1.

Impact

An issue was discovered in Symfony 2.7.x before 2.7.50, 2.8.x before 2.8.49, 3.x before 3.4.20, 4.0.x before 4.0.15, 4.1.x before 4.1.9, and 4.2.x before 4.2.1. When using the scalar type hint `string` in a setter method (e.g. `setName(string $name)`) of a class that's the `data_class` of a form, and when a file upload is submitted to the corresponding field instead of a normal text input, then `UploadedFile::__toString()` is called which will then return and disclose the path of the uploaded file. If combined with a local file inclusion issue in certain circumstances this could escalate it to a Remote Code Execution.

Affected products

VendorProductAffected versions
SensiolabsSymfony
from 2.7.0 before 2.7.50
from 2.8.0 before 2.8.49
from 3.0.0 before 3.4.20
from 4.0.0 before 4.0.15
from 4.1.0 before 4.1.9
from 4.2.0 before 4.2.1
DebianDebian Linux
Version 8.0

Weakness classification

CWE-434

References