---
title: "CVE-2016-4049\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-2016-4049?format=md
keywords: index, follow
---

# CVE-2016-4049

Publication date 23 May 2016

Last updated 25 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-4049?format=md#impact-score)

Toggle side navigation

## Description

The bgp\_dump\_routes\_func function in bgpd/bgp\_dump.c in Quagga does not
perform size checks when dumping data, which might allow remote attackers
to cause a denial of service (assertion failure and daemon crash) via a
large BGP packet.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2016-4049?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| quagga | 16.04 LTS xenial | Fixed 0.99.24.1-2ubuntu1.1 |
| 15.10 wily | Ignored end of life |
| 14.04 LTS trusty | Fixed 0.99.22.4-3ubuntu1.2 |
| 12.04 LTS precise | Fixed 0.99.20.1-0ubuntu0.12.04.5 |

---

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

## Notes

---

### [mdeslaur](https://launchpad.net/~mdeslaur)

as of 2016-09-15, upstream hasn't commited the proposed patch
debian released update with proposed patch

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

7.5 · High

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 7.5 · High |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-4049)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-4049)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-4049)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-4049)

### Related Ubuntu Security Notices (USN)

+ [USN-3102-1](https://usn.ubuntu.com/USN-3102-1)
+ Quagga vulnerabilities
+ 13 October 2016

### Other references

* <https://lists.quagga.net/pipermail/quagga-dev/2016-January/014699.html>
* <https://lists.quagga.net/pipermail/quagga-dev/2016-April/015241.html>
* <https://www.cve.org/CVERecord?id=CVE-2016-4049>