CVE-2018-19789 Information

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.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

http://www.securityfocus.com/bid/106249 https://lists.debian.org/debian-lts-announce/2019/03/msg00009.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4TD3E7FZIXLVFG3SMFJPDEKPZ26TJOW7/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/JZMRJ7VTHCY5AZK24G4QGX36RLUDTDKE/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/OA4WVFN5FYPIXAPLWZI6N425JHHDSWAZ/ https://seclists.org/bugtraq/2019/May/21 https://symfony.com/blog/cve-2018-19789-disclosure-of-uploaded-files-full-path https://www.debian.org/security/2019/dsa-4441

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3