---
title: "CVE-2018-17974\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-2018-17974?format=md
keywords: index, follow
---

# CVE-2018-17974

Publication date 3 October 2018

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.5 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2018-17974?format=md#impact-score)

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## Description

An issue was discovered in Tcpreplay 4.3.0 beta1. A heap-based buffer
over-read was triggered in the function dlt\_en10mb\_encode() of the file
plugins/dlt\_en10mb/en10mb.c, due to inappropriate values in the function
memmove(). The length (pktlen + ctx -> l2len) can be larger than source
value (packet + ctx->l2len) because the function fails to ensure the length
of a packet is valid. This leads to Denial of Service.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| tcpreplay | 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 | Ignored end of life |
| 20.04 LTS focal | Not affected |
| 19.10 eoan | Ignored end of life |
| 19.04 disco | Not affected |
| 18.10 cosmic | Ignored end of life |
| 18.04 LTS bionic | Fixed 4.2.6-1ubuntu0.1~esm1  Ubuntu Pro |
| 16.04 LTS xenial | Fixed 3.4.4-2+deb8u1ubuntu0.1~esm1  Ubuntu Pro |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2018-17974?format=md#patch-details)

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### Patch details

For informational purposes only. We recommend not to cherry-pick updates. [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)

| Package | Patch details |
| --- | --- |
| tcpreplay | * Upstream:   <https://github.com/appneta/tcpreplay/pull/492/commits/9062a91125065314877e03fc1e6ebbea7fc01ee8> * Upstream:   <https://github.com/appneta/tcpreplay/pull/492/commits/af0398766558a868dca232238f5df9eb151de304> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.5 · Medium

* Base metrics

  | Parameter | Value |
  | --- | --- |
  | Attack vector | Local |
  | 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 | 5.5 · Medium |
  | Exploitability score | - |
  | Impact score | - |

**Vector:** CVSS:3.0/AV:L/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-2018-17974)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2018-17974)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2018-17974)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2018-17974)

### Related Ubuntu Security Notices (USN)

+ [USN-5205-1](https://usn.ubuntu.com/USN-5205-1)
+ Tcpreplay vulnerabilities
+ 4 October 2022

### Other references

* <https://github.com/appneta/tcpreplay/issues/486>
* <https://github.com/SegfaultMasters/covering360/tree/master/tcpreplay>
* <https://www.cve.org/CVERecord?id=CVE-2018-17974>