Vulnerability Description
An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. When a form is submitted by the user, the request handler classes of the Form component merge POST data and uploaded files data into one array. This big array forms the data that are then bound to the form. At this stage there is no difference anymore between submitted POST data and uploaded files. A user can send a crafted HTTP request where the value of a "FileType" is sent as normal POST data that could be interpreted as a local file path on the server-side (for example, "file:///etc/passwd"). If the application did not perform any additional checks about the value submitted to the "FileType", the contents of the given file on the server could have been exposed to the attacker.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Sensiolabs | Symfony | >= 2.7.0, <= 2.7.37 |
| Debian | Debian Linux | 9.0 |
Related Weaknesses (CWE)
References
- https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-Issue TrackingPatchVendor Advisory
- https://www.debian.org/security/2018/dsa-4262Third Party Advisory
- https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-Issue TrackingPatchVendor Advisory
- https://www.debian.org/security/2018/dsa-4262Third Party Advisory
FAQ
What is CVE-2017-16790?
CVE-2017-16790 is a vulnerability with a CVSS score of 6.5 (MEDIUM). An issue was discovered in Symfony before 2.7.38, 2.8.31, 3.2.14, 3.3.13, 3.4-BETA5, and 4.0-BETA5. When a form is submitted by the user, the request handler classes of the Form component merge POST d...
How severe is CVE-2017-16790?
CVE-2017-16790 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-16790?
Check the references section above for vendor advisories and patch information. Affected products include: Sensiolabs Symfony, Debian Debian Linux.