From owner-svn-src-stable-11@freebsd.org Thu May 7 02:40:08 2020 Return-Path: Delivered-To: svn-src-stable-11@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id E748A2E9314; Thu, 7 May 2020 02:40:08 +0000 (UTC) (envelope-from tuexen@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 49Hd3X5tmTz4dn0; Thu, 7 May 2020 02:40:08 +0000 (UTC) (envelope-from tuexen@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 C38DC9A58; Thu, 7 May 2020 02:40:08 +0000 (UTC) (envelope-from tuexen@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id 0472e895000727; Thu, 7 May 2020 02:40:08 GMT (envelope-from tuexen@FreeBSD.org) Received: (from tuexen@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id 0472e8qY000726; Thu, 7 May 2020 02:40:08 GMT (envelope-from tuexen@FreeBSD.org) Message-Id: <202005070240.0472e8qY000726@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: tuexen set sender to tuexen@FreeBSD.org using -f From: Michael Tuexen Date: Thu, 7 May 2020 02:40:08 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-11@freebsd.org Subject: svn commit: r360752 - stable/11/sys/netinet X-SVN-Group: stable-11 X-SVN-Commit-Author: tuexen X-SVN-Commit-Paths: stable/11/sys/netinet X-SVN-Commit-Revision: 360752 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-stable-11@freebsd.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: SVN commit messages for only the 11-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 07 May 2020 02:40:09 -0000 Author: tuexen Date: Thu May 7 02:40:08 2020 New Revision: 360752 URL: https://svnweb.freebsd.org/changeset/base/360752 Log: MFC r355931: Improve input validation Improve input validation for some parameters having a too small reported length. Thanks to Natalie Silvanovich from Google for finding one of these issues in the SCTP userland stack and reporting it. Modified: stable/11/sys/netinet/sctp_auth.c stable/11/sys/netinet/sctp_pcb.c Directory Properties: stable/11/ (props changed) Modified: stable/11/sys/netinet/sctp_auth.c ============================================================================== --- stable/11/sys/netinet/sctp_auth.c Thu May 7 02:34:58 2020 (r360751) +++ stable/11/sys/netinet/sctp_auth.c Thu May 7 02:40:08 2020 (r360752) @@ -1429,7 +1429,8 @@ sctp_auth_get_cookie_params(struct sctp_tcb *stcb, str ptype = ntohs(phdr->param_type); plen = ntohs(phdr->param_length); - if ((plen == 0) || (offset + plen > length)) + if ((plen < sizeof(struct sctp_paramhdr)) || + (offset + plen > length)) break; if (ptype == SCTP_RANDOM) { Modified: stable/11/sys/netinet/sctp_pcb.c ============================================================================== --- stable/11/sys/netinet/sctp_pcb.c Thu May 7 02:34:58 2020 (r360751) +++ stable/11/sys/netinet/sctp_pcb.c Thu May 7 02:40:08 2020 (r360752) @@ -6205,7 +6205,7 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, s if (offset + plen > limit) { break; } - if (plen == 0) { + if (plen < sizeof(struct sctp_paramhdr)) { break; } #ifdef INET @@ -6430,6 +6430,9 @@ sctp_load_addresses_from_init(struct sctp_tcb *stcb, s } if (plen > sizeof(lstore)) { return (-23); + } + if (plen < sizeof(struct sctp_asconf_addrv4_param)) { + return (-101); } phdr = sctp_get_next_param(m, offset, (struct sctp_paramhdr *)&lstore,