CVE-2018-19789

Priority
Description
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.
Notes
Package
Upstream:released (3.4.20+dfsg-1)
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):DNE
Ubuntu 16.04 LTS (Xenial Xerus):needed
Ubuntu 18.04 LTS (Bionic Beaver):needed
Ubuntu 20.04 LTS (Focal Fossa):not-affected (3.4.20+dfsg-1)
Ubuntu 20.10 (Groovy Gorilla):not-affected (3.4.20+dfsg-1)
More Information

Updated: 2020-09-09 22:06:08 UTC (commit b67d7d8b03f173f825cd706df5bd078bca500b0e)