---
title: "CVE-2017-16672\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-2017-16672?format=md
keywords: index, follow
---

# CVE-2017-16672

Publication date 9 November 2017

Last updated 26 August 2025

---

Ubuntu priority

**Medium**

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

## Cvss 3 Severity Score

**5.9 · Medium**

[Score breakdown](https://ubuntu.com/security/CVE-2017-16672?format=md#impact-score)

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## Description

An issue was discovered in Asterisk Open Source 13 before 13.18.1, 14
before 14.7.1, and 15 before 15.1.1 and Certified Asterisk 13.13 before
13.13-cert7. A memory leak occurs when an Asterisk pjsip session object is
created and that call gets rejected before the session itself is fully
established. When this happens the session object never gets destroyed.
Eventually Asterisk can run out of memory and crash.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| asterisk | 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 |
| 17.10 artful | Ignored end of life |
| 17.04 zesty | Ignored end of life |
| 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)
* [Patch details](https://ubuntu.com/security/CVE-2017-16672?format=md#patch-details)

### 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 |
| --- | --- |
| asterisk | * Upstream:   <http://downloads.asterisk.org/pub/security/AST-2017-011-13.diff> |

## Severity score breakdown

CVSS version:
CVSS v3.0

**Base score**

5.9 · Medium

* Base metrics

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

  | Parameter | Value |
  | --- | --- |
  | Base score | 5.9 · Medium |
  | Exploitability score | - |
  | Impact score | - |

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

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-16672)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2017-16672)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2017-16672)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2017-16672)

### Other references

* <http://downloads.digium.com/pub/security/AST-2017-011.html>
* <http://downloads.asterisk.org/pub/security/AST-2017-011-13.diff>
* <https://issues.asterisk.org/jira/browse/ASTERISK-27345>
* <https://www.cve.org/CVERecord?id=CVE-2017-16672>