[oss-security] 20160503 Re: hostapd/wpa_supplicant - psk configuration parameter update allowing arbitrary data to be written

USN-3455-1

This update for hostapd fixes the following issues :

  - Fix KRACK attacks on the AP side (boo#1063479,     CVE-2017-13078, CVE-2017-13079, CVE-2017-13080,     CVE-2017-13081, CVE-2017-13087, CVE-2017-13088) :

Hostap was updated to upstream release 2.6

  - fixed EAP-pwd last fragment validation     [http://w1.fi/security/2015-7/] (CVE-2015-5314)

  - fixed WPS configuration update vulnerability with     malformed passphrase [http://w1.fi/security/2016-1/]     (CVE-2016-4476)

  - extended channel switch support for VHT bandwidth     changes

  - added support for configuring new ANQP-elements with     anqp_elem=<InfoID>:<hexdump of payload>

  - fixed Suite B 192-bit AKM to use proper PMK length     (note: this makes old releases incompatible with the     fixed behavior)

  - added no_probe_resp_if_max_sta=1 parameter to disable     Probe Response frame sending for not-associated STAs if     max_num_sta limit has been reached

  - added option (-S as command line argument) to request     all interfaces to be started at the same time

  - modified rts_threshold and fragm_threshold configuration     parameters to allow -1 to be used to disable     RTS/fragmentation

  - EAP-pwd: added support for Brainpool Elliptic Curves     (with OpenSSL 1.0.2 and newer)

  - fixed EAPOL reauthentication after FT protocol run

  - fixed FTIE generation for 4-way handshake after FT     protocol run

  - fixed and improved various FST operations

  - TLS server

  - support SHA384 and SHA512 hashes

  - support TLS v1.2 signature algorithm with SHA384 and     SHA512

  - support PKCS #5 v2.0 PBES2

  - support PKCS #5 with PKCS #12 style key decryption

  - minimal support for PKCS #12

  - support OCSP stapling (including ocsp_multi)

  - added support for OpenSSL 1.1 API changes

  - drop support for OpenSSL 0.9.8

  - drop support for OpenSSL 1.0.0

  - EAP-PEAP: support fast-connect crypto binding

  - RADIUS

  - fix Called-Station-Id to not escape SSID

  - add Event-Timestamp to all Accounting-Request packets

  - add Acct-Session-Id to Accounting-On/Off

  - add Acct-Multi-Session-Id ton Access-Request packets

  - add Service-Type (= Frames)

  - allow server to provide PSK instead of passphrase for     WPA-PSK Tunnel_password case

  - update full message for interim accounting updates

  - add Acct-Delay-Time into Accounting messages

  - add require_message_authenticator configuration option     to require CoA/Disconnect-Request packets to be     authenticated

  - started to postpone WNM-Notification frame sending by     100 ms so that the STA has some more time to configure     the key before this frame is received after the 4-way     handshake

  - VHT: added interoperability workaround for 80+80 and 160     MHz channels

  - extended VLAN support (per-STA vif, etc.)

  - fixed PMKID derivation with SAE

  - nl80211

  - added support for full station state operations

  - fix IEEE 802.1X/WEP EAP reauthentication and rekeying to     use unencrypted EAPOL frames

  - added initial MBO support; number of extensions to WNM     BSS Transition Management

  - added initial functionality for location related     operations

  - added assocresp_elements parameter to allow vendor     specific elements to be added into (Re)Association     Response frames

  - improved Public Action frame addressing

  - use Address 3 = wildcard BSSID in GAS response if a     query from an unassociated STA used that address

  - fix TX status processing for Address 3 = wildcard BSSID

  - add gas_address3 configuration parameter to control     Address 3 behavior

  - added command line parameter -i to override interface     parameter in hostapd.conf

  - added command completion support to hostapd_cli

  - added passive client taxonomy determination     (CONFIG_TAXONOMY=y compile option and 'SIGNATURE <addr>'     control interface command)

  - number of small fixes

hostapd was updated to upstream release 2.5

  - (CVE-2015-1863) is fixed in upstream release 2.5

  - fixed WPS UPnP vulnerability with HTTP chunked transfer     encoding [http://w1.fi/security/2015-2/] (CVE-2015-4141     boo#930077)

  - fixed WMM Action frame parser     [http://w1.fi/security/2015-3/] (CVE-2015-4142     boo#930078)

  - fixed EAP-pwd server missing payload length validation     [http://w1.fi/security/2015-4/] (CVE-2015-4143,     CVE-2015-4144, CVE-2015-4145, boo#930079)

  - fixed validation of WPS and P2P NFC NDEF record payload     length [http://w1.fi/security/2015-5/]

  - nl80211 :

  - fixed vendor command handling to check OUI properly

  - fixed hlr_auc_gw build with OpenSSL

  - hlr_auc_gw: allow Milenage RES length to be reduced

  - disable HT for a station that does not support WMM/QoS

  - added support for hashed password (NtHash) in EAP-pwd     server

  - fixed and extended dynamic VLAN cases

  - added EAP-EKE server support for deriving Session-Id

  - set Acct-Session-Id to a random value to make it more     likely to be unique even if the device does not have a     proper clock

  - added more 2.4 GHz channels for 20/40 MHz HT co-ex scan

  - modified SAE routines to be more robust and PWE     generation to be stronger against timing attacks

  - added support for Brainpool Elliptic Curves with SAE

  - increases maximum value accepted for cwmin/cwmax

  - added support for CCMP-256 and GCMP-256 as group ciphers     with FT

  - added Fast Session Transfer (FST) module

  - removed optional fields from RSNE when using FT with PMF     (workaround for interoperability issues with iOS 8.4)

  - added EAP server support for TLS session resumption

  - fixed key derivation for Suite B 192-bit AKM (this     breaks compatibility with the earlier version)

  - added mechanism to track unconnected stations and do     minimal band steering

  - number of small fixes

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.

Jouni Malinen reports :

psk configuration parameter update allowing arbitrary data to be written (2016-1 - CVE-2016-4476/CVE-2016-4477).

A vulnerability was found in how hostapd and wpa_supplicant writes the configuration file update for the WPA/WPA2 passphrase parameter. If this parameter has been updated to include control characters either through a WPS operation (CVE-2016-4476) or through local configuration change over the wpa_supplicant control interface (CVE-2016-4477), the resulting configuration file may prevent the hostapd and wpa_supplicant from starting when the updated file is used. In addition for wpa_supplicant, it may be possible to load a local library file and execute code from there with the same privileges under which the wpa_supplicant process runs.

CVE-2016-4476 hostapd 0.6.7 through 2.5 and wpa_supplicant 0.6.7 through 2.5 do not reject \n and \r characters in passphrase parameters, which allows remote attackers to cause a denial of service (daemon outage) via a crafted WPS operation.

CVE-2016-4477 wpa_supplicant 0.4.0 through 2.5 does not reject \n and \r characters in passphrase parameters, which allows local users to trigger arbitrary library loading and consequently gain privileges, or cause a denial of service (daemon outage), via a crafted (1) SET, (2) SET_CRED, or (3) SET_NETWORK command.

For Debian 7 'Wheezy', these problems have been fixed in version 1.0-3+deb7u4.

We recommend that you upgrade your wpa packages.

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

ID	Name	Product	Family	Severity
104237	openSUSE Security Update : hostapd (openSUSE-2017-1201) (KRACK)	Nessus	SuSE Local Security Checks	high
103863	Ubuntu 14.04 LTS / 16.04 LTS / 17.04 : wpa vulnerabilities (USN-3455-1) (KRACK)	Nessus	Ubuntu Local Security Checks	high
91268	FreeBSD : hostapd and wpa_supplicant -- psk configuration parameter update allowing arbitrary data to be written (967b852b-1e28-11e6-8dd3-002590263bf5)	Nessus	FreeBSD Local Security Checks	high
91135	Debian DLA-473-1 : wpa security update	Nessus	Debian Local Security Checks	high

CVE-2016-4476

high

New! CVE Severity Now Using CVSS v3

Description

References

Details

Risk Information

CVSS v2

CVSS v3

Vulnerable Software

Configuration 1

Configuration 2

Tenable Plugins

high

high

high

high