---
title: "CVE-2017-14170\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-2017-14170?format=md
keywords: index, follow
---

# CVE-2017-14170

Publication date 7 September 2017

Last updated 25 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-2017-14170?format=md#impact-score)

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## Description

In libavformat/mxfdec.c in FFmpeg 3.3.3 -> 2.4, a DoS in
mxf\_read\_index\_entry\_array() due to lack of an EOF (End of File) check
might cause huge CPU consumption. When a crafted MXF file, which claims a
large "nb\_index\_entries" field in the header but does not contain
sufficient backing data, is provided, the loop would consume huge CPU
resources, since there is no EOF check inside the loop. Moreover, this big
loop can be invoked multiple times if there is more than one applicable
data segment in the crafted MXF file.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| ffmpeg | 18.04 LTS bionic | Not affected |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 16.04 LTS xenial | Fixed 7:2.8.14-0ubuntu0.16.04.1 |
| 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 | None |
  | User interaction | Required |
  | Scope | Unchanged |
  | Confidentiality impact | None |
  | Integrity impact | None |
  | Availability impact | High |
* Scores

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

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-14170)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-14170)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-14170)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-14170)

### Other references

* <https://github.com/FFmpeg/FFmpeg/commit/900f39692ca0337a98a7cf047e4e2611071810c2>
* <https://www.cve.org/CVERecord?id=CVE-2017-14170>