Sicherheit: Mehrere Probleme in hostapd und wpa_supplicant

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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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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
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13080
[ 5 ] CVE-2017-13081
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13081
[ 6 ] CVE-2017-13082
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13082
[ 7 ] CVE-2017-13084
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13084
[ 8 ] CVE-2017-13086
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13086
[ 9 ] CVE-2017-13087
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13087
[ 10 ] CVE-2017-13088
 https://nvd.nist.gov/nvd.cfm?cvename=CVE-2017-13088
[ 11 ] KRACK Attacks Website
 https://www.krackattacks.com/
 
Availability
============
 
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
 
 https://security.gentoo.org/glsa/201711-03
 
Concerns?
=========
 
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users' machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
https://bugs.gentoo.org.
 
License
=======
 
Copyright 2017 Gentoo Foundation, Inc; referenced text
belongs to its owner(s).
 
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
 
http://creativecommons.org/licenses/by-sa/2.5</body></html>
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