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Category:   Application (Generic)  >   wpa_supplicant Vendors:   Malinen, Jouni et al
(Red Hat Issues Fix) wpa_supplicant P2P SSID Parsing Flaw May Let Remote Users Execute Arbitrary Code
SecurityTracker Alert ID:  1032570
SecurityTracker URL:  http://securitytracker.com/id/1032570
CVE Reference:   CVE-2015-1863   (Links to External Site)
Date:  Jun 12 2015
Impact:   Denial of service via network, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, User access via network
Fix Available:  Yes  Vendor Confirmed:  Yes  Exploit Included:  Yes  
Version(s): 1.0 - 2.4; with CONFIG_P2P build option enabled
Description:   A vulnerability reported in wpa_supplicant. A remote user can cause denial of service conditions, obtain potentially sensitive information, or potentially execute arbitrary code on the target system.

A remote user on the wireless network can send specially crafted SSID data to trigger a buffer overflow and potentially execute arbitrary code on the target system.

Specially crafted management frames that create or update P2P peer entries (e.g., Probe Response frame, P2P Public Action frames) can trigger this flaw.

The Google security team and smart hardware research group of Alibaba security team reported this vulnerability.

Impact:   A remote user may be able to execute arbitrary code on the target system.

A remote user can cause denial of service conditions.

A remote user can obtain potentially sensitive information.

Solution:   Red Hat has issued a fix.

The Red Hat advisory is available at:

https://rhn.redhat.com/errata/RHSA-2015-1090.html

Vendor URL:  w1.fi/wpa_supplicant/ (Links to External Site)
Cause:   Boundary error
Underlying OS:  Linux (Red Hat Enterprise)
Underlying OS Comments:  7

Message History:   This archive entry is a follow-up to the message listed below.
Apr 23 2015 wpa_supplicant P2P SSID Parsing Flaw May Let Remote Users Execute Arbitrary Code



 Source Message Contents

Subject:  [RHSA-2015:1090-01] Important: wpa_supplicant security and enhancement update

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=====================================================================
                   Red Hat Security Advisory

Synopsis:          Important: wpa_supplicant security and enhancement update
Advisory ID:       RHSA-2015:1090-01
Product:           Red Hat Enterprise Linux
Advisory URL:      https://rhn.redhat.com/errata/RHSA-2015-1090.html
Issue date:        2015-06-11
CVE Names:         CVE-2015-1863 CVE-2015-4142 
=====================================================================

1. Summary:

An updated wpa_supplicant package that fixes two security issues and adds
one enhancement is now available for Red Hat Enterprise Linux 7.

Red Hat Product Security has rated this update as having Important security
impact. Common Vulnerability Scoring System (CVSS) base scores, which give
detailed severity ratings, are available for each vulnerability from the
CVE links in the References section.

2. Relevant releases/architectures:

Red Hat Enterprise Linux Client (v. 7) - x86_64
Red Hat Enterprise Linux ComputeNode (v. 7) - x86_64
Red Hat Enterprise Linux Server (v. 7) - ppc64, ppc64le, s390x, x86_64
Red Hat Enterprise Linux Workstation (v. 7) - x86_64

3. Description:

The wpa_supplicant package contains an 802.1X Supplicant with support for
WEP, WPA, WPA2 (IEEE 802.11i / RSN), and various EAP authentication
methods. It implements key negotiation with a WPA Authenticator for client
stations and controls the roaming and IEEE 802.11 authentication and
association of the WLAN driver.

A buffer overflow flaw was found in the way wpa_supplicant handled SSID
information in the Wi-Fi Direct / P2P management frames. A specially
crafted frame could allow an attacker within Wi-Fi radio range to cause
wpa_supplicant to crash or, possibly, execute arbitrary code.
(CVE-2015-1863)

An integer underflow flaw, leading to a buffer over-read, was found in the
way wpa_supplicant handled WMM Action frames. A specially crafted frame
could possibly allow an attacker within Wi-Fi radio range to cause
wpa_supplicant to crash. (CVE-2015-4142)

Red Hat would like to thank Jouni Malinen of the wpa_supplicant upstream
for reporting the CVE-2015-1863 issue. Upstream acknowledges Alibaba
security team as the original reporter.

This update also adds the following enhancement:

* Prior to this update, wpa_supplicant did not provide a way to require the
host name to be listed in an X.509 certificate's Common Name or Subject
Alternative Name, and only allowed host name suffix or subject substring
checks. This update introduces a new configuration directive,
'domain_match', which adds a full host name check. (BZ#1178263)

All wpa_supplicant users are advised to upgrade to this updated package,
which contains backported patches to correct these issues and add this
enhancement. After installing this update, the wpa_supplicant service will
be restarted automatically.

4. Solution:

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

5. Bugs fixed (https://bugzilla.redhat.com/):

1178263 - wpa_supplicant: add support for non-substring server identity check [rhel-7]
1211191 - CVE-2015-1863 wpa_supplicant: P2P SSID processing vulnerability
1221178 - CVE-2015-4142 wpa_supplicant and hostapd: integer underflow in AP mode WMM Action frame processing

6. Package List:

Red Hat Enterprise Linux Client (v. 7):

Source:
wpa_supplicant-2.0-17.el7_1.src.rpm

x86_64:
wpa_supplicant-2.0-17.el7_1.x86_64.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.x86_64.rpm

Red Hat Enterprise Linux ComputeNode (v. 7):

Source:
wpa_supplicant-2.0-17.el7_1.src.rpm

x86_64:
wpa_supplicant-2.0-17.el7_1.x86_64.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
wpa_supplicant-2.0-17.el7_1.src.rpm

ppc64:
wpa_supplicant-2.0-17.el7_1.ppc64.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.ppc64.rpm

s390x:
wpa_supplicant-2.0-17.el7_1.s390x.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.s390x.rpm

x86_64:
wpa_supplicant-2.0-17.el7_1.x86_64.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.x86_64.rpm

Red Hat Enterprise Linux Server (v. 7):

Source:
wpa_supplicant-2.0-17.ael7b_1.src.rpm

ppc64le:
wpa_supplicant-2.0-17.ael7b_1.ppc64le.rpm
wpa_supplicant-debuginfo-2.0-17.ael7b_1.ppc64le.rpm

Red Hat Enterprise Linux Workstation (v. 7):

Source:
wpa_supplicant-2.0-17.el7_1.src.rpm

x86_64:
wpa_supplicant-2.0-17.el7_1.x86_64.rpm
wpa_supplicant-debuginfo-2.0-17.el7_1.x86_64.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2015-1863
https://access.redhat.com/security/cve/CVE-2015-4142
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2015 Red Hat, Inc.
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