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Gentoo Linux Security Advisory                           GLSA 201711-03
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                                           https://security.gentoo.org/
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 Severity: Normal
    Title: hostapd and wpa_supplicant: Key Reinstallation (KRACK)
           attacks
     Date: November 10, 2017
     Bugs: #634436, #634438
       ID: 201711-03

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Synopsis
========

A flaw was discovered in the 4-way handshake in hostapd and
wpa_supplicant that allows attackers to conduct a Man in the Middle
attack.

Background
==========

wpa_supplicant is a WPA Supplicant with support for WPA and WPA2 (IEEE
802.11i / RSN). hostapd is a user space daemon for access point and
authentication servers.

Affected packages
=================

    -------------------------------------------------------------------
     Package              /     Vulnerable     /            Unaffected
    -------------------------------------------------------------------
  1  net-wireless/hostapd         < 2.6-r1                  >= 2.6-r1 
  2  net-wireless/wpa_supplicant
                                  < 2.6-r3                  >= 2.6-r3 
    -------------------------------------------------------------------
     2 affected packages

Description
===========

WiFi Protected Access (WPA and WPA2) and it's associated technologies
are all vulnerable to the KRACK attacks. Please review the referenced
CVE identifiers for details.

Impact
======

An attacker can carry out the KRACK attacks on a wireless network in
order to gain access to network clients. Once achieved, the attacker
can potentially harvest confidential information (e.g. HTTP/HTTPS),
inject malware, or perform a myriad of other attacks.

Workaround
==========

There is no known workaround at this time.

Resolution
==========

All hostapd users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot --verbose ">=net-wireless/hostapd-2.6-r1"

All wpa_supplicant users should upgrade to the latest version:

  # emerge --sync
  # emerge --ask --oneshot -v ">=net-wireless/wpa_supplicant-2.6-r3"

References
==========

[  1 ] CVE-2017-13077
       https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13077
[  2 ] CVE-2017-13078
       https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13078
[  3 ] CVE-2017-13079
       https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13079
[  4 ] CVE-2017-13080