Ubuntu Security Update USN-3455-1: wpa_supplicant and hostapd vulnerabilities

Ubuntu Security Notice USN-3455-1


16th October, 2017

wpa vulnerabilities


A security issue affects these releases of Ubuntu and its derivatives:

• Ubuntu 17.04
• Ubuntu 16.04 LTS
• Ubuntu 14.04 LTS

Summary


Several security issues were fixed in wpa_supplicant.

Software description

• wpa - client support for WPA and WPA2

Details


Mathy Vanhoef discovered that wpa_supplicant and hostapd incorrectly
handled WPA2. A remote attacker could use this issue with key
reinstallation attacks to obtain sensitive information. (CVE-2017-13077,
CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081,
CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088)

Imre Rad discovered that wpa_supplicant and hostapd incorrectly handled
invalid characters in passphrase parameters. A remote attacker could use
this issue to cause a denial of service. (CVE-2016-4476)

Imre Rad discovered that wpa_supplicant and hostapd incorrectly handled
invalid characters in passphrase parameters. A local attacker could use
this issue to cause a denial of service, or possibly execute arbitrary
code. (CVE-2016-4477)

Update instructions


The problem can be corrected by updating your system to the following package version:

Ubuntu 17.04:
hostapd 2.4-0ubuntu9.1
wpasupplicant 2.4-0ubuntu9.1
Ubuntu 16.04 LTS:
hostapd 2.4-0ubuntu6.2
wpasupplicant 2.4-0ubuntu6.2
Ubuntu 14.04 LTS:
hostapd 2.1-0ubuntu1.5
wpasupplicant 2.1-0ubuntu1.5

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

After a standard system update you need to reboot your computer to make
all the necessary changes.

References


CVE-2016-4476, CVE-2016-4477, CVE-2017-13077, CVE-2017-13078, CVE-2017-13079, CVE-2017-13080, CVE-2017-13081, CVE-2017-13082, CVE-2017-13086, CVE-2017-13087, CVE-2017-13088

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