---
title: "CVE-2017-16790\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2017-16790?format=md
keywords: index, follow
---

# CVE-2017-16790

Publication date 6 August 2018

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

## Cvss 3 Severity Score

**6.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-16790?format=md#impact-score)

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## 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.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| symfony | 26.04 LTS resolute | Not affected |
| 25.10 questing | Not affected |
| 25.04 plucky | Not affected |
| 24.10 oracular | Not affected |
| 24.04 LTS noble | Not affected |
| 23.10 mantic | Not affected |
| 23.04 lunar | Not affected |
| 22.10 kinetic | Not affected |
| 22.04 LTS jammy | Not affected |
| 21.10 impish | Not affected |
| 21.04 hirsute | Not affected |
| 20.10 groovy | Not affected |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Not affected |
| 19.04 disco | Not affected |
| 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Vulnerable |
| 14.04 LTS trusty | Not in release |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

6.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Network |
  | Attack complexity | Low |
  | Privileges required | Low |
  | User interaction | None |
  | Scope | Unchanged |
  | Confidentiality impact | High |
  | Integrity impact | None |
  | Availability impact | None |
* Scores

  | Parameter | Value |
  | --- | --- |
  | Base score | 6.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16790)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-16790)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-16790)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-16790)

### Other references

* <https://symfony.com/blog/cve-2017-16790-ensure-that-submitted-data-are-uploaded-files>
* <https://github.com/symfony/symfony/pull/24993>
* <https://www.cve.org/CVERecord?id=CVE-2017-16790>