Debian DSA-3999-1 : wpa - security update (KRACK)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote Debian host is missing a security-related update.

Description :

Mathy Vanhoef of the imec-DistriNet research group of KU Leuven
discovered multiple vulnerabilities in the WPA protocol, used for
authentication in wireless networks. Those vulnerabilities apply to
both the access point (implemented in hostapd) and the station
(implemented in wpa_supplicant).

An attacker exploiting the vulnerabilities could force the vulnerable
system to reuse cryptographic session keys, enabling a range of
cryptographic attacks against the ciphers used in WPA1 and WPA2.

More information can be found in the researchers's paper, Key
Reinstallation Attacks: Forcing Nonce Reuse in WPA2.

- CVE-2017-13077 :
reinstallation of the pairwise key in the Four-way
handshake

- CVE-2017-13078 :
reinstallation of the group key in the Four-way
handshake

- CVE-2017-13079 :
reinstallation of the integrity group key in the
Four-way handshake

- CVE-2017-13080 :
reinstallation of the group key in the Group Key
handshake

- CVE-2017-13081 :
reinstallation of the integrity group key in the Group
Key handshake

- CVE-2017-13082 :
accepting a retransmitted Fast BSS Transition
Reassociation Request and reinstalling the pairwise key
while processing it

- CVE-2017-13086 :
reinstallation of the Tunneled Direct-Link Setup (TDLS)
PeerKey (TPK) key in the TDLS handshake

- CVE-2017-13087 :
reinstallation of the group key (GTK) when processing a
Wireless Network Management (WNM) Sleep Mode Response
frame

- CVE-2017-13088 :
reinstallation of the integrity group key (IGTK) when
processing a Wireless Network Management (WNM) Sleep
Mode Response frame

See also :

https://www.krackattacks.com/#paper
https://security-tracker.debian.org/tracker/CVE-2017-13077
https://security-tracker.debian.org/tracker/CVE-2017-13078
https://security-tracker.debian.org/tracker/CVE-2017-13079
https://security-tracker.debian.org/tracker/CVE-2017-13080
https://security-tracker.debian.org/tracker/CVE-2017-13081
https://security-tracker.debian.org/tracker/CVE-2017-13082
https://security-tracker.debian.org/tracker/CVE-2017-13086
https://security-tracker.debian.org/tracker/CVE-2017-13087
https://security-tracker.debian.org/tracker/CVE-2017-13088
https://packages.debian.org/source/jessie/wpa
https://packages.debian.org/source/stretch/wpa
http://www.debian.org/security/2017/dsa-3999

Solution :

Upgrade the wpa packages.

For the oldstable distribution (jessie), these problems have been
fixed in version 2.3-1+deb8u5.

For the stable distribution (stretch), these problems have been fixed
in version 2:2.4-1+deb9u1.

Risk factor :

Medium / CVSS Base Score : 5.8
(CVSS2#AV:A/AC:L/Au:N/C:P/I:P/A:P)

Family: Debian Local Security Checks

Nessus Plugin ID: 103859 ()

Bugtraq ID:

CVE ID: 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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