From owner-svn-src-head@FreeBSD.ORG Tue Dec 1 02:57:07 2009 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9EC0C1065672; Tue, 1 Dec 2009 02:57:07 +0000 (UTC) (envelope-from cperciva@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id 8D6A78FC1C; Tue, 1 Dec 2009 02:57:07 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.3/8.14.3) with ESMTP id nB12v7UR049987; Tue, 1 Dec 2009 02:57:07 GMT (envelope-from cperciva@svn.freebsd.org) Received: (from cperciva@localhost) by svn.freebsd.org (8.14.3/8.14.3/Submit) id nB12v7Qe049986; Tue, 1 Dec 2009 02:57:07 GMT (envelope-from cperciva@svn.freebsd.org) Message-Id: <200912010257.nB12v7Qe049986@svn.freebsd.org> From: Colin Percival Date: Tue, 1 Dec 2009 02:57:07 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Cc: Subject: svn commit: r199979 - head/libexec/rtld-elf X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 01 Dec 2009 02:57:07 -0000 Author: cperciva Date: Tue Dec 1 02:57:06 2009 New Revision: 199979 URL: http://svn.freebsd.org/changeset/base/199979 Log: Fix local root vulnerability. Security: Advisory will be coming soon. X-MFC-After: 30 seconds Modified: head/libexec/rtld-elf/rtld.c Modified: head/libexec/rtld-elf/rtld.c ============================================================================== --- head/libexec/rtld-elf/rtld.c Tue Dec 1 00:42:17 2009 (r199978) +++ head/libexec/rtld-elf/rtld.c Tue Dec 1 02:57:06 2009 (r199979) @@ -366,12 +366,12 @@ _rtld(Elf_Addr *sp, func_ptr_type *exit_ * future processes to honor the potentially un-safe variables. */ if (!trust) { - unsetenv(LD_ "PRELOAD"); - unsetenv(LD_ "LIBMAP"); - unsetenv(LD_ "LIBRARY_PATH"); - unsetenv(LD_ "LIBMAP_DISABLE"); - unsetenv(LD_ "DEBUG"); - unsetenv(LD_ "ELF_HINTS_PATH"); + if (unsetenv(LD_ "PRELOAD") || unsetenv(LD_ "LIBMAP") || + unsetenv(LD_ "LIBRARY_PATH") || unsetenv(LD_ "LIBMAP_DISABLE") || + unsetenv(LD_ "DEBUG") || unsetenv(LD_ "ELF_HINTS_PATH")) { + _rtld_error("environment corrupt; aborting"); + die(); + } } ld_debug = getenv(LD_ "DEBUG"); libmap_disable = getenv(LD_ "LIBMAP_DISABLE") != NULL;