From owner-svn-src-stable-12@freebsd.org Wed Dec 19 18:18:00 2018 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 04583133F428; Wed, 19 Dec 2018 18:18:00 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9F8148D340; Wed, 19 Dec 2018 18:17:59 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 8F8061998A; Wed, 19 Dec 2018 18:17:59 +0000 (UTC) (envelope-from emaste@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wBJIHxnO005280; Wed, 19 Dec 2018 18:17:59 GMT (envelope-from emaste@FreeBSD.org) Received: (from emaste@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wBJIHxYE005279; Wed, 19 Dec 2018 18:17:59 GMT (envelope-from emaste@FreeBSD.org) Message-Id: <201812191817.wBJIHxYE005279@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: emaste set sender to emaste@FreeBSD.org using -f From: Ed Maste Date: Wed, 19 Dec 2018 18:17:59 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r342228 - stable/12/libexec/bootpd X-SVN-Group: stable-12 X-SVN-Commit-Author: emaste X-SVN-Commit-Paths: stable/12/libexec/bootpd X-SVN-Commit-Revision: 342228 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: 9F8148D340 X-Spamd-Bar: -- Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-2.95 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_MEDIUM(-1.00)[-0.998,0]; NEURAL_HAM_SHORT(-0.95)[-0.955,0]; NEURAL_HAM_LONG(-1.00)[-0.998,0] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 19 Dec 2018 18:18:00 -0000 Author: emaste Date: Wed Dec 19 18:17:59 2018 New Revision: 342228 URL: https://svnweb.freebsd.org/changeset/base/342228 Log: MFC r342227: bootpd: validate hardware type Due to insufficient validation of network-provided data it may have been possible for a malicious actor to craft a bootp packet which could cause a stack buffer overflow. admbugs: 850 Reported by: Reno Robert Reviewed by: markj Approved by: so Security: FreeBSD-SA-18:15.bootpd Sponsored by: The FreeBSD Foundation Modified: stable/12/libexec/bootpd/bootpd.c Directory Properties: stable/12/ (props changed) Modified: stable/12/libexec/bootpd/bootpd.c ============================================================================== --- stable/12/libexec/bootpd/bootpd.c Wed Dec 19 18:16:29 2018 (r342227) +++ stable/12/libexec/bootpd/bootpd.c Wed Dec 19 18:17:59 2018 (r342228) @@ -636,6 +636,10 @@ handle_request() char *homedir, *bootfile; int n; + if (bp->bp_htype >= hwinfocnt) { + report(LOG_NOTICE, "bad hw addr type %u", bp->bp_htype); + return; + } bp->bp_file[sizeof(bp->bp_file)-1] = '\0'; /* XXX - SLIP init: Set bp_ciaddr = recv_addr here? */