Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : wpa vulnerabilities (USN-3455-1) (KRACK)

Ubuntu Security Notice (C) 2017 Canonical, Inc. / NASL script (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Ubuntu host is missing one or more security-related
patches.

Description :

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).

Note that Tenable Network Security has extracted the preceding
description block directly from the Ubuntu security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

Solution :

Update the affected hostapd and / or wpasupplicant packages.

Risk factor :

Medium / CVSS Base Score : 5.8
(CVSS2#AV:A/AC:L/Au:N/C:P/I:P/A:P)
CVSS Temporal Score : 5.5
(CVSS2#E:F/RL:U/RC:ND)
Public Exploit Available : true

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