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
Published · last modified .
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.
EPSS exploit prediction
EPSS: 0.036 (89.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000
Affected products
- Sensiolabs Symfony
- Debian Linux — versions 8.0
Weakness classification (CWE)
References
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.securityfocus.com/bid/106249 (VDB Entry, Third Party Advisory, vdb-entry)
- symfony.com/blog/cve-2018-19789-disclosure-of-uploaded-files-full-path (Patch, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00009.html (mailing-list, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.debian.org/security/2019/dsa-4441 (vendor-advisory)
- seclists.org/bugtraq/2019/May/21 (mailing-list)
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.