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Gentoo Linux Security Advisory 201711-03

Gentoo Linux Security Advisory 201711-03
Posted Nov 10, 2017
Authored by Gentoo | Site security.gentoo.org

Gentoo Linux Security Advisory 201711-3 - 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. Versions less than 2.6-r1 are affected.

tags | advisory
systems | linux, gentoo
advisories | CVE-2017-13077, CVE-2017-13078, CVE-2017-13079
MD5 | 8731f81b531a48efb061f1527de2e711

Gentoo Linux Security Advisory 201711-03

Change Mirror Download
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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

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