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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0759 pkg bootstrapping, configuration and public keys 20 May 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: pkg Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Provide Misleading Information -- Remote with User Interaction Resolution: Patch/Upgrade Original Bulletin: http://www.freebsd.org/security/advisories/FreeBSD-EN-14:03.pkg.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-EN-14:03.pkg Errata Notice The FreeBSD Project Topic: pkg bootstrapping, configuration and public keys Category: core, packages Module: pkg Announced: 2014-05-13 Credits: Baptiste Daroussin, Bryan Drewery Affects: All versions of FreeBSD prior to 10.0-RELEASE Corrected: 2014-04-15 23:40:47 UTC (stable/8, 8.4-STABLE) 2014-05-13 23:24:32 UTC (releng/8.4, 8.4-RELEASE-p10) 2014-03-11 14:48:44 UTC (stable/9, 9.2-STABLE) 2014-05-13 23:24:14 UTC (releng/9.2, 9.2-RELEASE-p6) 2014-05-13 23:24:14 UTC (releng/9.1, 9.1-RELEASE-p13) For general information regarding FreeBSD Errata Notices and Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.freebsd.org/>. I. Background The pkg(7) utility is the new package management tool for FreeBSD. The FreeBSD project has provided official pkg(7) packages since October 2013 and signed packages since the pkg-1.2 release in November 2013. The signature checking requires known public keys to be installed locally. The repository configuration must be installed as well. The base system also includes a pkg(7) bootstrap tool that installs the latest real pkg(7) package. The bootstrap tool knows where to find the official pkg(7) package but once that is installed the real pkg(7) will not know where to find official packages, nor have the known public key for signature checking. The bootstrap tool was also improved in 10.0-RELEASE to check the signature on the pkg(7) package it is installing. II. Problem Description Only FreeBSD 10.0 has been released with the official repository configuration, known public keys, and a bootstrap tool that checks the signature of the pkg(7) package it is installing. To allow packages to be used on a system, the configuration must be manually setup and keys securely fetched and installed to the proper location. III. Impact Releases before 10.0 require manual configuration. Manually configuring the pkg(7) signatures could result in insecurely installing the keys or leaving the signature checking disabled. The bootstrap tool is not secure on releases prior to 10.0 due to not checking the signature and could result in having an unofficial pkg(7) installed due to MITM attacks. IV. Workaround To securely install pkg(7) on releases prior to 10.0, install it from ports obtained from a secure portsnap checkout: # portsnap fetch extract # echo "WITH_PKGNG=yes" >> /etc/make.conf # make -C /usr/ports/ports-mgmt/pkg install clean If this is an existing system it may be converted to pkg(7) as well by running: # pkg2ng After this is done /usr/ports may be removed if no longer required. To workaround the configuration and keys being missed, apply the solution in this Errata. V. Solution No solution is provided for pkg(7) bootstrap signature checking on releases prior to 10.0. Upgrading to 10.0 or stable/9 after r263038 will suffice. To install the configuration and public key in a secure means, perform one of the following: 1) Upgrade your system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. 2) To update your present 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. [FreeBSD 9.2] # fetch http://security.FreeBSD.org/patches/EN-14:03/pkg-en-releng-9.2.patch # fetch http://security.FreeBSD.org/patches/EN-14:10/pkg-en-releng-9.2.patch.asc # gpg --verify pkg-en-releng-9.2.patch.asc [FreeBSD 9.1] # fetch http://security.FreeBSD.org/patches/EN-14:03/pkg-en-releng-9.1.patch # fetch http://security.FreeBSD.org/patches/EN-14:10/pkg-en-releng-9.1.patch.asc # gpg --verify pkg-en-releng-9.1.patch.asc [FreeBSD 8.4] # fetch http://security.FreeBSD.org/patches/EN-14:03/pkg-en-releng-8.4.patch # fetch http://security.FreeBSD.org/patches/EN-14:03/pkg-en-releng-8.4.patch.asc # gpg --verify pkg-en-releng-8.4.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch # cd /usr/src/etc/pkg # mkdir -p /etc/pkg /usr/share/keys/pkg/trusted /usr/share/keys/pkg/revoked # make install # cd /usr/src/share/keys/pkg # make install 3) To update your 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 VI. Correction details The following list contains the revision numbers of each file that was corrected in FreeBSD. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r264519 releng/8.4/ r265989 stable/9/ r263937 (*) releng/9.1/ r265988 releng/9.2/ r265988 - - ------------------------------------------------------------------------- (*) The actual required changeset consists a series of changes, including r263023,r258550,r263050,r263053 and r263937. 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:http://svnweb.freebsd.org/base?view=revision&revision=NNNNNN> VII. References The latest revision of this Errata Notice is available at http://security.FreeBSD.org/advisories/FreeBSD-EN-14:03.pkg.asc - -----BEGIN PGP SIGNATURE----- Version: GnuPG v2.0.22 (FreeBSD) iQIcBAEBCgAGBQJTcq5IAAoJEO1n7NZdz2rnPgsP/i1EV9g4qXg9v6HvakiFFKrv 51810uJe/Eo9iujDT1TpwuYJuFQPzkW+h4JRvapaSLAMxeLsYqxj8WDuKz0eU6sW WjaPv6LZWUG91jHbFr3uEAgLLvkc86kMI/hfSmzq5FY7gsisEKoyfdraR2E63jtp BFARxAq9hnddck5zZiX7wCOMtvCVrvrSsozft1p885AUra+Tg9F1RuUloS0CYddD FtUb1dPMshkHlqHqC1wGzRfBVFgX7NnXfnxIi2St1ft0tEDKIL+HQgnjU2CwKbK7 S9ioLYbbUhyo6edpS/4+y5gJ1kVLvlelY4myBHUkSOMJrsxoIBCTuXjdnO9PL5gr qpS9R6TQEMF5auEG5aIOwfu5t8wqczAfC4zVzbm4UPakRYPFS0NfvkDGW2Gno7Yh iOur/JFLUOqbV9i8UwssS8OzG0cr8EzbZ3iLkVPqt1Cxuxxpx8+NYiYV3F0PMxB8 iImoOD1BY0lS3x0gqgeZb5ssBk988aVq1cmbrUuriHuKLK/uvSaFHlGXprQyQmTn 4FEFmMNTCSMbYy3J2daEajUroiZVcBEjORPFR8QYtncRgbzB6u/AjVIo+3Uk/0hj paC8dvBikmT7ity3b7YoOvJIJn62XVqrq9srkYowkDuLJ1E8zQqmR2eZUOmf5vG1 u3zAXa3xup1ginA9Wi6O =UI84 - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBU3qeshLndAQH1ShLAQJR+BAAnQMrIal1Qr2vIXUPVqo59SXKRwrxgaZd y8IBKz+gQikNli9Rp/Av/K9LTtDeoYxLLODrfBBoJAS6tweRbGl8FCkUaMOZHp7n A7nFD0zpBcCqukBSvAth1qbM+Ao25vD9YMZvDePuCwm3WO+2YJDE4Ku74utLZKDX tMcEiErcIu3fw3EpAs+xFV4BDhA5ezOjySuetfXCbNTpmEAgqcFh3ETNXZppCfBf +Wj+Nt/pGliKaH77QmoMKz17P2NITa3JleJxyEDwxnLJlAbzy3vd7js2vMzsEoCk SnO9NuMGIrZbVvYdFpItSvswor5nXsWg6ioZuHFAIt7wWLiSLywf2+/X333revNP NHfyXLsPiKhQ202bew5PEF3T3XwsBMtFCyaM8rsuq2rHQ6tVR190fUhPaNsiAbR0 Payycmr038JdvAH79vJCG+MOusoVMaQjHqm77lNjvBQBtNABfdmIxVjbNfdLMh5n rqM+osx9HRpepKgyAiKkVv3Y9sUsZ2vbGUpd4FP6tCzM0Nzsd9fl2E7n4BgLwIIO Up8uTgEzmhQ8FrCmX44jZIKJ/XCzClXfedmcz/KDN0YSdN5+spbckGD91QG+i2zP 0Dcij6ePigfA+4AAPDbvvVT35O3ZETbxsjIfs7x5ZKD5a+LRIkCMQdyehPw0uUkf avLsTNHS1J4= =2Fcz -----END PGP SIGNATURE-----