FreeBSD Security Advisory FreeBSD-SA-17:07.wpa
17 October, 2017 by firstname.lastname@example.org | freebsd
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-17:07.wpa Security Advisory The FreeBSD Project Topic: WPA2 protocol vulnerability Category: contrib Module: wpa Announced: 2017-10-16 Credits: Mathy Vanhoef Affects: All supported versions of FreeBSD. Corrected: 2017-10-17 17:30:18 UTC (stable/11, 11.1-STABLE) 2017-10-17 17:57:18 UTC (releng/11.1, 11.1-RELEASE-p2) 2017-10-17 17:56:03 UTC (releng/11.0, 11.0-RELEASE-p13) CVE Name: 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 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 and wpa_supplicant are implementations of user space daemon for access points and wireless client that implements the WPA2 protocol. II. Problem Description A vulnerability was found in how a number of implementations can be triggered to reconfigure WPA/WPA2/RSN keys (TK, GTK, or IGTK) by replaying a specific frame that is used to manage the keys. III. Impact Such reinstallation of the encryption key can result in two different types of vulnerabilities: disabling replay protection and significantly reducing the security of encryption to the point of allowing frames to be decrypted or some parts of the keys to be determined by an attacker depending on which cipher is used. IV. Workaround An updated version of wpa_supplicant is available in the FreeBSD Ports Collection. Install version 2.6_2 or later of the security/wpa_supplicant port/pkg. Once installed, update /etc/rc.conf to use the new binary: wpa_supplicant_program="/usr/local/sbin/wpa_supplicant" and restart networking. An updated version of hostapd is available in the FreeBSD Ports Collection. Install version 2.6_1 or later of the net/hostapd port/pkg. Once installed, update /etc/rc.conf to use the new binary: hostapd_program="/usr/local/sbin/hostapd" and restart hostapd. V. Solution Patches are currently available for stable/11, releng/11.0, and releng/11.1. Patches for stable/10, releng/10.3, and releng/10.4 are still being evaluated. 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. Restart the Wi-Fi network interfaces/hostapd or reboot the system. 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 Restart the Wi-Fi network interfaces/hostapd or reboot the system. 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 11.0-RELEASE, 11.1-RELEASE, and 11-STABLE] # fetch https://security.FreeBSD.org/patches/SA-17:07/wpa-11.patch # fetch https://security.FreeBSD.org/patches/SA-17:07/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/11/ r324697 releng/11.0/ r324698 releng/11.1/ r324699 - ------------------------------------------------------------------------- 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/2017-1/wpa-packet-number-reuse-with-replayed-messages.txt> <URL:https://www.krackattacks.com/> The latest revision of this advisory is available at <URL:https://security.FreeBSD.org/advisories/FreeBSD-SA-17:07.wpa.asc> -----BEGIN PGP SIGNATURE----- iQKTBAEBCgB9FiEEHPf/b631yp++G4yy7Wfs1l3PaucFAlnmRUZfFIAAAAAALgAo aXNzdWVyLWZwckBub3RhdGlvbnMub3BlbnBncC5maWZ0aGhvcnNlbWFuLm5ldDFD RjdGRjZGQURGNUNBOUZCRTFCOENCMkVENjdFQ0Q2NURDRjZBRTcACgkQ7Wfs1l3P aueKcxAAwObogcEZAgGioU4uZvk9kKIpmG/NwvUjcZ0viFhePowKnh6/UoFDd+13 NsjriznPNKbXPch2Gp3Zwgd/hff10vlvr69QOFXnI3/Y8b+thxkl1kCAxC0xkfEl eQBzjllMrjtrSgfKtoWInxnZLIrghuJAg4Jvvz+uWd3VTggM0pQgLUuhR/a8lWHd 3HBj5//sOhmVW2OFYC5dskYAn6TqyHtlMP9AT32h6QEyEzJeNWMlToELxy6OK59j MYaS0vclz7QT+4SATvcl8RCmxmYfyWxEtFhDmPNz4mfQ915AxTjGFv7KbjTZtunl k3niR3O8F450xduw5Yj9Mz3YdZ4ZYmvHbDgQLsMNwAmtQvXSteXUUBVNVAg9PsjR 4kxlEFsStWh6CtJVKYUvKDThnHrWYLiVUh6o/FtRm5fx2ws/gcj7H9csr8mQ0pkO zm9jVOgMe7pqI7gygOfb61Rjz6PnLgVQcnP2LoC9pB21O5Q/Q2rv9d6XN3mQ6CQ2 +mUEZ5M7TWyd6gFrP2Eu6srec1nT1NjVjzyyupgusiQve3xV0wacG0jwgy7+VXE8 Ls2a/SObVDZkvFhOYMrLVui33l7f/vgT0KImyO2fkaWjbDcEyVcm1f+A7K+hqwp8 2O/Eh+NVSG0GIbt9pro0BxsZhMb/V4WmWV+4WnLKPwCQZ9fimKA= =aNWn -----END PGP SIGNATURE----- _______________________________________________ email@example.com mailing list https://lists.freebsd.org/mailman/listinfo/freebsd-announce To unsubscribe, send any mail to "firstname.lastname@example.org"