The eap_pwd_process function in eap_server/eap_server_pwd.c in hostapd 2.x before 2.6 does not validate that the reassembly buffer is large enough for the final fragment when used with (1) an internal EAP server or (2) a RADIUS server and EAP-pwd is enabled in a runtime configuration, which allows remote attackers to cause a denial of service (process termination) via a large final fragment in an EAP-pwd message.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - The eap_pwd_process function in eap_server/eap_server_pwd.c in hostapd 2.x before 2.6 does not validate
    that the reassembly buffer is large enough for the final fragment when used with (1) an internal EAP
    server or (2) a RADIUS server and EAP-pwd is enabled in a runtime configuration, which allows remote
    attackers to cause a denial of service (process termination) via a large final fragment in an EAP-pwd
    message. (CVE-2015-5314)

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

The remote Ubuntu 14.04 LTS host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-2808-1 advisory.

    It was discovered that wpa_supplicant incorrectly handled WMM Sleep Mode Response frame processing. A     remote attacker could use this issue to perform broadcast/multicast packet injections, or cause a denial     of service. (CVE-2015-5310)

    It was discovered that wpa_supplicant and hostapd incorrectly handled certain EAP-pwd messages. A remote     attacker could use this issue to cause a denial of service. (CVE-2015-5314, CVE-2015-5315)

    It was discovered that wpa_supplicant incorrectly handled certain EAP-pwd Confirm messages. A remote     attacker could use this issue to cause a denial of service. This issue only applied to Ubuntu 15.10.
    (CVE-2015-5316)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Several vulnerabilities have been discovered in wpa_supplicant and hostapd. The Common Vulnerabilities and Exposures project identifies the following problems :

  - CVE-2015-4141     Kostya Kortchinsky of the Google Security Team     discovered a vulnerability in the WPS UPnP function with     HTTP chunked transfer encoding which may result in a     denial of service.

  - CVE-2015-4142     Kostya Kortchinsky of the Google Security Team     discovered a vulnerability in the WMM Action frame     processing which may result in a denial of service.

  - CVE-2015-4143 CVE-2015-4144 CVE-2015-4145 CVE-2015-4146     Kostya Kortchinsky of the Google Security Team     discovered that EAP-pwd payload is not properly     validated which may result in a denial of service.

  - CVE-2015-5310     Jouni Malinen discovered a flaw in the WMM Sleep Mode     Response frame processing. A remote attacker can take     advantage of this flaw to mount a denial of service.

  - CVE-2015-5314 CVE-2015-5315     Jouni Malinen discovered a flaw in the handling of     EAP-pwd messages which may result in a denial of     service.

  - CVE-2015-5316     Jouni Malinen discovered a flaw in the handling of     EAP-pwd Confirm messages which may result in a denial of     service.

  - CVE-2015-8041     Incomplete WPS and P2P NFC NDEF record payload length     validation may result in a denial of service.

ID	Name	Product	Family	Severity
401110	Alpine: multiple hostapd packages: security update to 2.5-r0 (deprecated)	Tenable Cloud Security	Alpine Linux Local Security Checks	medium
401110	Alpine: multiple hostapd packages: security update to 2.5-r0 (deprecated)	Tenable Self-Hosted Container Security	Alpine Linux Local Security Checks	medium
104237	openSUSE Security Update : hostapd (openSUSE-2017-1201) (KRACK)	Nessus	SuSE Local Security Checks	high
86848	Ubuntu 14.04 LTS : wpa_supplicant and hostapd vulnerabilities (USN-2808-1)	Nessus	Ubuntu Local Security Checks	medium
86833	Debian DSA-3397-1 : wpa - security update	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2015-5314

medium

Tenable Plugins

medium

medium

high

medium

medium