Arbitrary file upload in Sensiolabs Symfony
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. 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.
Vulnerability class: Unrestricted File Upload
EPSS: 0.036 (88.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.
Affected products
- Sensiolabs Symfony
- Debian Debian_linux — versions 8.0
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA)
- cve@mitre.org (VDB Entry, Third Party Advisory, vdb-entry, x_refsource_BID)
- cve@mitre.org (x_refsource_CONFIRM, Patch, Vendor Advisory)
- cve@mitre.org (mailing-list, x_refsource_MLIST, Mailing List, Third Party Advisory)
- cve@mitre.org (vendor-advisory, x_refsource_FEDORA)
- cve@mitre.org (vendor-advisory, x_refsource_DEBIAN)
- cve@mitre.org (mailing-list, x_refsource_BUGTRAQ)
Frequently asked questions
- What is CVE-2018-19789?
- CVE-2018-19789 is a medium-severity vulnerability in Sensiolabs Symfony, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 5.3/10. Published 2018-12-18.
- How severe is CVE-2018-19789?
- Medium severity. CVSS v3 base score is 5.3 out of 10.