Improper input validation in Sensiolabs Symfony
CVE-2017-16790
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.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.016 (74.5th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 75th percentile — 74.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.016 · newest: 0.016 · change: +0.000
Affected products
- Sensiolabs Symfony
- Debian Linux — versions 9.0
Weakness classification (CWE)
References
- symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-files (Patch, Issue Tracking, Vendor Advisory)
- www.debian.org/security/2018/dsa-4262 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2017-16790?
- CVE-2017-16790 is a medium-severity vulnerability in Sensiolabs Symfony, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2018-08-06.
- How severe is CVE-2017-16790?
- Medium severity. CVSS v3 base score is 6.5 out of 10.