From owner-freebsd-security-notifications@FreeBSD.ORG Thu Feb 14 12:10:42 2008 Return-Path: Delivered-To: freebsd-security-notifications@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 9D04916A469; Thu, 14 Feb 2008 12:10:42 +0000 (UTC) (envelope-from security-advisories@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 86DAC13C45D; Thu, 14 Feb 2008 12:10:42 +0000 (UTC) (envelope-from security-advisories@FreeBSD.org) Received: from freefall.freebsd.org (simon@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m1ECAgR0071163; Thu, 14 Feb 2008 12:10:42 GMT (envelope-from security-advisories@freebsd.org) Received: (from simon@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m1ECAgOI071161; Thu, 14 Feb 2008 12:10:42 GMT (envelope-from security-advisories@freebsd.org) Date: Thu, 14 Feb 2008 12:10:42 GMT Message-Id: <200802141210.m1ECAgOI071161@freefall.freebsd.org> X-Authentication-Warning: freefall.freebsd.org: simon set sender to security-advisories@freebsd.org using -f From: FreeBSD Security Advisories To: FreeBSD Security Advisories Precedence: bulk Cc: Subject: FreeBSD Security Advisory FreeBSD-SA-08:03.sendfile X-BeenThere: freebsd-security-notifications@freebsd.org X-Mailman-Version: 2.1.5 Reply-To: freebsd-security@FreeBSD.org List-Id: "Moderated Security Notifications \[moderated, low volume\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Feb 2008 12:10:42 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-08:03.sendfile Security Advisory The FreeBSD Project Topic: sendfile(2) write-only file permission bypass Category: core Module: sys_kern Announced: 2008-02-14 Credits: Kostik Belousov Affects: All supported versions of FreeBSD Corrected: 2008-02-14 11:45:00 UTC (RELENG_7, 7.0-PRERELEASE) 2008-02-14 11:45:41 UTC (RELENG_7_0, 7.0-RELEASE) 2008-02-14 11:46:08 UTC (RELENG_6, 6.3-STABLE) 2008-02-14 11:46:41 UTC (RELENG_6_3, 6.3-RELEASE-p1) 2008-02-14 11:47:06 UTC (RELENG_6_2, 6.2-RELEASE-p11) 2008-02-14 11:47:39 UTC (RELENG_6_1, 6.1-RELEASE-p23) 2008-02-14 11:49:39 UTC (RELENG_5, 5.5-STABLE) 2008-02-14 11:50:28 UTC (RELENG_5_5, 5.5-RELEASE-p19) CVE Name: CVE-2008-0777 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The sendfile(2) system call allows a server application (such as a HTTP or FTP server) to transmit the contents of a file over a network connection without first copying it to application memory. High performance servers such as the Apache HTTP Server and ftpd use sendfile. II. Problem Description When a process opens a file (and other file system objects, such as directories), it specifies access flags indicating its intent to read, write, or perform other operations. These flags are checked against file system permissions, and then stored in the resulting file descriptor to validate future operations against. The sendfile(2) system call does not check the file descriptor access flags before sending data from a file. III. Impact If a file is write-only, a user process can open the file and use sendfile to send the content of the file over a socket, even though the user does not have read access to the file, resulting in possible disclosure of sensitive information. IV. Workaround No workaround is available, but systems are only vulnerable if write-only files exist, which are not widely used. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 5-STABLE, 6-STABLE, or 7.0-PRERELEASE, or to the RELENG_7_0, RELENG_6_3, RELENG_6_2, RELENG_6_1, or RELENG_5_5 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 5.5, 6.1, 6.2, 6.3, and 7.0 systems. a) Download the relevant patch from the location below, and verify the detached PGP signature using your PGP utility. [FreeBSD 6.2, 6.3, and 7.0] # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile.patch # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile.patch.asc [FreeBSD 6.1] # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile61.patch # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile61.patch.asc [FreeBSD 5.5] # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile55.patch # fetch http://security.FreeBSD.org/patches/SA-08:03/sendfile55.patch.asc b) Apply the patch. # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_5 src/sys/kern/kern_descrip.c 1.243.2.11 RELENG_5_5 src/UPDATING 1.342.2.35.2.20 src/sys/conf/newvers.sh 1.62.2.21.2.21 src/sys/kern/kern_descrip.c 1.243.2.9.2.1 RELENG_6 src/sys/kern/kern_descrip.c 1.279.2.16 src/sys/kern/uipc_syscalls.c 1.221.2.5 RELENG_6_3 src/UPDATING 1.416.2.37.2.5 src/sys/conf/newvers.sh 1.69.2.15.2.4 src/sys/kern/kern_descrip.c 1.279.2.15.2.1 src/sys/kern/uipc_syscalls.c 1.221.2.4.4.1 RELENG_6_2 src/UPDATING 1.416.2.29.2.15 src/sys/conf/newvers.sh 1.69.2.13.2.14 src/sys/kern/kern_descrip.c 1.279.2.9.2.1 src/sys/kern/uipc_syscalls.c 1.221.2.4.2.1 RELENG_6_1 src/UPDATING 1.416.2.22.2.26 src/sys/conf/newvers.sh 1.69.2.11.2.25 src/sys/kern/kern_descrip.c 1.279.2.6.2.1 src/sys/kern/uipc_syscalls.c 1.221.2.1.2.1 RELENG_7 src/sys/kern/kern_descrip.c 1.313.2.1 src/sys/kern/uipc_syscalls.c 1.259.2.2 RELENG_7_0 src/UPDATING 1.507.2.3.2.3 src/sys/kern/kern_descrip.c 1.313.4.1 src/sys/kern/uipc_syscalls.c 1.259.4.2 - ------------------------------------------------------------------------- VII. References http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0777 The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-08:03.sendfile.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) iD8DBQFHtC0DFdaIBMps37IRAqp8AJ91+flnCIUSvKoFQyXfD1YTnPnuqgCcDiPJ SR4X1dNFENsHMq9ROrQhr1c= =TX1R -----END PGP SIGNATURE----- From owner-freebsd-security-notifications@FreeBSD.ORG Thu Feb 14 12:11:31 2008 Return-Path: Delivered-To: freebsd-security-notifications@hub.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 4DF9A16A52B; Thu, 14 Feb 2008 12:11:31 +0000 (UTC) (envelope-from security-advisories@FreeBSD.org) Received: from freefall.freebsd.org (freefall.freebsd.org [IPv6:2001:4f8:fff6::28]) by mx1.freebsd.org (Postfix) with ESMTP id 393F513C478; Thu, 14 Feb 2008 12:11:31 +0000 (UTC) (envelope-from security-advisories@FreeBSD.org) Received: from freefall.freebsd.org (simon@localhost [127.0.0.1]) by freefall.freebsd.org (8.14.2/8.14.2) with ESMTP id m1ECBVx4071253; Thu, 14 Feb 2008 12:11:31 GMT (envelope-from security-advisories@freebsd.org) Received: (from simon@localhost) by freefall.freebsd.org (8.14.2/8.14.1/Submit) id m1ECBV0j071251; Thu, 14 Feb 2008 12:11:31 GMT (envelope-from security-advisories@freebsd.org) Date: Thu, 14 Feb 2008 12:11:31 GMT Message-Id: <200802141211.m1ECBV0j071251@freefall.freebsd.org> X-Authentication-Warning: freefall.freebsd.org: simon set sender to security-advisories@freebsd.org using -f From: FreeBSD Security Advisories To: FreeBSD Security Advisories Precedence: bulk Cc: Subject: FreeBSD Security Advisory FreeBSD-SA-08:04.ipsec X-BeenThere: freebsd-security-notifications@freebsd.org X-Mailman-Version: 2.1.5 Reply-To: freebsd-security@FreeBSD.org List-Id: "Moderated Security Notifications \[moderated, low volume\]" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 14 Feb 2008 12:11:31 -0000 -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 ============================================================================= FreeBSD-SA-08:04.ipsec Security Advisory The FreeBSD Project Topic: IPsec null pointer dereference panic Category: core Module: ipsec Announced: 2008-02-14 Credits: Takashi Sogabe, Tatuya Jinmei Affects: FreeBSD 5.5 Corrected: 2008-02-14 11:49:39 UTC (RELENG_5, 5.5-STABLE) 2008-02-14 11:50:28 UTC (RELENG_5_5, 5.5-RELEASE-p19) CVE Name: CVE-2008-0177 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The IPsec suite of protocols provide network level security for IPv4 and IPv6 packets. FreeBSD includes software originally developed by the KAME project which implements the various protocols that make up IPsec. II. Problem Description There is an improper reference to a data structure in the processing of IPsec packets, which can result in a NULL pointer being dereferenced. III. Impact A single specifically crafted IPv6 packet could cause the kernel to panic, when the kernel had been configured to process IPsec and IPv6 traffic. This requires IPSEC to be compiled into the kernel, it does not necessarily have to be configured at that point. IV. Workaround No workaround is available, but kernels which does not include IPsec support are not vulnerable. The GENERIC and SMP kernel configurations distributed with FreeBSD releases do not include IPsec support. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to 5-STABLE, or to the RELENG_5_5 security branch dated after the correction date. 2) To patch your present system: The following patches have been verified to apply to FreeBSD 5.5 systems. 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-08:04/ipsec.patch # fetch http://security.FreeBSD.org/patches/SA-08:04/ipsec.patch.asc b) Apply the patch. # cd /usr/src # patch < /path/to/patch c) Recompile your kernel as described in and reboot the system. VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch Revision Path - ------------------------------------------------------------------------- RELENG_5 src/sys/netinet6/ipcomp_input.c 1.7.4.2 RELENG_5_5 src/UPDATING 1.342.2.35.2.20 src/sys/conf/newvers.sh 1.62.2.21.2.21 src/sys/netinet6/ipcomp_input.c 1.7.4.1.4.1 - ------------------------------------------------------------------------- VII. References http://www.kb.cert.org/vuls/id/110947 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-0177 The latest revision of this advisory is available at http://security.FreeBSD.org/advisories/FreeBSD-SA-08:04.ipsec.asc -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.8 (FreeBSD) iD8DBQFHtC0HFdaIBMps37IRAt5gAKCGnYEX3r7n0Dsypmfv2m1J9pgICwCfd6uH Gy2w6OYNovnfrb7EN0jWCjM= =jHy3 -----END PGP SIGNATURE-----