---
title: "CVE-2016-10743\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-2016-10743?format=md
keywords: index, follow
---

# CVE-2016-10743

Publication date 23 March 2019

Last updated 25 August 2025

---

Ubuntu priority

**Low**

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

## Cvss 3 Severity Score

**7.5 · High**

[Score breakdown](https://ubuntu.com/security/CVE-2016-10743?format=md#impact-score)

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## Description

hostapd before 2.6 does not prevent use of the low-quality PRNG that is
reached by an os\_random() function call.

[Read the notes from the security team](https://ubuntu.com/security/CVE-2016-10743?format=md#notes)

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| wpa | 18.10 cosmic | Not affected |
| 18.04 LTS bionic | Not affected |
| 16.04 LTS xenial | Fixed 2.4-0ubuntu6.4 |
| 14.04 LTS trusty | Fixed 2.1-0ubuntu1.7 |

---

* [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-2016-10743?format=md#patch-details)

## Notes

---

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

low-quality PRNG is only used as a fallback if /dev/urandom
can't be opened

### 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 |
| --- | --- |
| wpa | * Upstream:   [?id=98a](https://w1.fi/cgit/hostap/commit/?id=98a516eae8260e6fd5c48ddecf8d006285da7389) |

## 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 | High |
  | Availability impact | None |
* 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:H/A:N

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-10743)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2016-10743)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2016-10743)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2016-10743)

### Related Ubuntu Security Notices (USN)

+ [USN-3944-1](https://usn.ubuntu.com/USN-3944-1)
+ wpa\_supplicant and hostapd vulnerabilities
+ 10 April 2019

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2016-10743>