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FreeBSD-SA-19:03.wpa Security Advisory
The FreeBSD Project

Topic: Multiple vulnerabilities in hostapd and wpa_supplicant

Category: contrib
Module: wpa
Announced: 2019-05-14
Affects: All supported versions of FreeBSD.
Corrected: 2019-05-01 01:42:38 UTC (stable/12, 12.0-STABLE)
2019-05-14 22:57:29 UTC (releng/12.0, 12.0-RELEASE-p4)
2019-05-01 01:43:17 UTC (stable/11, 11.2-STABLE)
2019-05-14 22:59:32 UTC (releng/11.2, 11.2-RELEASE-p10)
CVE Name: CVE-2019-9494, CVE-2019-9495, CVE-2019-9496, CVE-2019-9497,
CVE-2019-9498, CVE-2019-9499, CVE-2019-11555

For general information regarding FreeBSD Security Advisories,
including descriptions of the fields above, security branches, and the
following sections, please visit <URL:https://security.FreeBSD.org/>.

I. Background

Wi-Fi Protected Access II (WPA2) is a security protocol developed by the
Wi-Fi Alliance to secure wireless computer networks.

hostapd(8) and wpa_supplicant(8) are implementations of user space daemon for
access points and wireless client that implements the WPA2 protocol.

II. Problem Description

Multiple vulnerabilities exist in the hostapd(8) and wpa_supplicant(8)
implementations. For more details, please see the reference URLs in the
References section below.

III. Impact

Security of the wireless network may be compromised. For more details,
please see the reference URLS in the References section below.

IV. Workaround

No workaround is available, but systems not using hostapd(8) or
wpa_supplicant(8) are not affected.

V. Solution

Perform one of the following:

1) Upgrade your vulnerable system to a supported FreeBSD stable or
release / security branch (releng) dated after the correction date.

Afterwards, restart hostapd(8) or wpa_supplicant(8).

2) To update your vulnerable system via a binary patch:

Systems running a RELEASE version of FreeBSD on the i386 or amd64
platforms can be updated via the freebsd-update(8) utility:

# freebsd-update fetch
# freebsd-update install

Afterwards, restart hostapd(8) or wpa_supplicant(8).

3) To update your vulnerable system via a source code patch:

The following patches have been verified to apply to the applicable
FreeBSD release branches.

a) Download the relevant patch from the location below, and verify the
detached PGP signature using your PGP utility.

[FreeBSD 12.0]
# fetch https://security.FreeBSD.org/patches/SA-19:03/wpa-12.patch
# fetch https://security.FreeBSD.org/patches/SA-19:03/wpa-12.patch.asc
# gpg –verify wpa-12.patch.asc

[FreeBSD 11.2]
# fetch https://security.FreeBSD.org/patches/SA-19:03/wpa-11.patch
# fetch https://security.FreeBSD.org/patches/SA-19:03/wpa-11.patch.asc
# gpg –verify wpa-11.patch.asc

b) Apply the patch. Execute the following commands as root:

# cd /usr/src
# patch < /path/to/patch

c) Recompile the operating system using buildworld and installworld as
described in <URL:https://www.FreeBSD.org/handbook/makeworld.html>.

Restart the applicable daemons, or reboot the system.

VI. Correction details

The following list contains the correction revision numbers for each
affected branch.

Branch/path Revision
– ————————————————————————-
stable/12/ r346980
releng/12.0/ r347587
stable/11/ r346981
releng/11.2/ r347588
– ————————————————————————-

To see which files were modified by a particular revision, run the
following command, replacing NNNNNN with the revision number, on a
machine with Subversion installed:

# svn diff -cNNNNNN –summarize svn://svn.freebsd.org/base

Or visit the following URL, replacing NNNNNN with the revision number:

<URL:https://svnweb.freebsd.org/base?view=revision&revision=NNNNNN>

VII. References

<URL:https://w1.fi/security/2019-1>
<URL:https://w1.fi/security/2019-2>
<URL:https://w1.fi/security/2019-3>
<URL:https://w1.fi/security/2019-4>
<URL:https://w1.fi/security/2019-5>

<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9494>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9495>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9496>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9497>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9498>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-9499>
<URL:https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11555>

The latest revision of this advisory is available at
<URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-19:03.wpa.asc>
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