FreeBSD has issued a Security Advisory concerning a remote denial of service vulnerability. Please see below on how to apply the patches.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-15:19.routed Security Advisory The FreeBSD ProjectTopic: routed(8) remote denial of service vulnerability Category: core Module: routed Announced: 2015-08-05 Credits: Hiroki Sato Affects: All supported versions of FreeBSD. Corrected: 2015-08-05 22:05:02 UTC (stable/10, 10.2-PRERELEASE) 2015-08-05 22:05:02 UTC (stable/10, 10.2-BETA2-p3) 2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC1-p2) 2015-08-05 22:05:12 UTC (releng/10.2, 10.2-RC2-p1) 2015-08-05 22:05:18 UTC (releng/10.1, 10.1-RELEASE-p17) 2015-08-05 22:05:07 UTC (stable/9, 9.3-STABLE) 2015-08-05 22:05:24 UTC (releng/9.3, 9.3-RELEASE-p22) CVE Name: CVE-2015-5674 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 The routing information protocol (RIP) is an older routing protocol which, while not as capable as more recent protocols such as OSPF and BGP, is sometimes preferred for its simplicity and therefore still used as an interior gateway protocol on smaller networks. Routers in a RIP network periodically broadcast their routing table on all enabled interfaces. Neighboring routers and hosts receive these broadcasts and update their routing tables accordingly. The routed(8) daemon is a RIP implementation for FreeBSD. The rtquery(8) utility can be used to send a RIP query to a router and display the result without updating the routing table. II. Problem Description
The input path in routed(8) will accept queries from any source and attempt to answer them. However, the output path assumes that the destination address for the response is on a directly connected network. III. Impact Upon receipt of a query from a source which is not on a directly connected network, routed(8) will trigger an assertion and terminate. The affected system's routing table will no longer be updated. If the affected system is a router, its routes will eventually expire from other routers' routing tables, and its networks will no longer be reachable unless they are also connected to another router. IV. Workaround Note that this problem does not affect a system on which routed(8) is not enabled. The routed(8) daemon is not enabled by default. Use a packet filter such as pf(4) or ipfw(4) to block incoming UDP packets with destination port 520 that did not originate on the same subnet as the destination address. 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. The routed service has to be restarted after the update. A reboot is recommended but not required. 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 The routed service has to be restarted after the update. A reboot is recommended but not required. 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. # fetch http://security.FreeBSD.org/patches/SA-15:19/routed.patch # fetch http://security.FreeBSD.org/patches/SA-15:19/routed.patch.asc # gpg --verify routed.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/routed.patch c) Recompile routed. Execute the following commands as root: # cd /usr/src/sbin/routed # make && make install Restart the routed daemon, or reboot the system. To restart the affected service after updating the system, either reboot the system or execute the following command as root: # service routed restart VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/9/ r286349 releng/9.3/ r286352 stable/10/ r286348 releng/10.1/ r286351 releng/10.2/ r286350 - ------------------------------------------------------------------------- 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://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2015-5674> The latest revision of this advisory is available at <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-15:19.routed.asc> -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.1.6 (FreeBSD) iQIcBAEBCgAGBQJVwoplAAoJEO1n7NZdz2rnMFAP/3HWG6FrFxM3jgMcK7a5+nKP O6BqVXpFdia0UUN5JlcEZXc89957mXdMXCDqNeTj3CeDc0p9GbPX1zV/vlYoOqhM eIPwgERbMRFnDRaWm2ClG+aatJvdpeDEioNy8b8tmKq94JcpXIJnwX8dhY3WrMwj Mc3QBGT08XLImHqNw6d6/0wavFeOZ/3g1ZoloAktsgA9KhTUOai6dUhIbIJzk6gh 0oa4NRkhzRNmUKyHOS6HDrghhQ/kZGtE8joVBxLBljK0Thi0mIZtn3UFGsNAgAWw 7WGAiTN2o8c48IUJosmiGsJ7rV1wCFt5zXrZVCcnq6dr60He16Z2Zwif2tugiTvm 5x9lDbTEnYOTxM38Ya5gMtMf733YgAtoRCkf3ROsnwXukJYVsJXms7Ej4NihoKMd aYOLDItl+AXUGIyQ44GuUm2955wo9Fb5RlkDSCLAvdgnkPk+k0puLp0MR0B2MOAI tdKNecRNg0fDR5gJbfdzdjVhsGBZXdYlxo4VjXUXDSZJ+8+jkAg2LA9DTRKIfbgX BX5GiOhkhIivFlgvSePv0LRuIbgt0H1cxiJdk6OqNS5gROuqwo7wwUnaig8KVKOI 887gfpf7PepYD4xWTo3nAoEcGM0rBwUyq1X3pbx9OJADcqRvOhxfMcHFcCv75uxa OISkQhkWdZUv6ls76rRu =p5Rl -----END PGP SIGNATURE----- _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-security To unsubscribe, send any mail to "freebsd-security-unsubscr...@freebsd.org"