FreeBSD Security Advisory FreeBSD-SA-16:23.libarchive

Fabricante: FreeBSD
Fecha: 31/05/2016
Identificador: FreeBSD-SA-16:23.libarchive
FreeBSD Security Advisory FreeBSD-SA-16:23.libarchive
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-16:23.libarchive Security Advisory The FreeBSD Project Topic: Buffer overflow in libarchive(3) Category: contrib Module: libarchive Announced: 2016-05-31 Affects: FreeBSD 9.3 Corrected: 2016-05-21 09:27:30 UTC (stable/9, 9.3-STABLE) 2016-05-31 16:23:56 UTC (releng/9.3, 9.3-RELEASE-p43) CVE Name: CVE-2013-0211 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit . I. Background The libarchive(3) library provides a flexible interface for reading and writing streaming archive files such as tar and cpio, and has been the basis for FreeBSD's implementation of the tar(1) and cpio(1) utilities since FreeBSD 5.3. II. Problem Description An integer signedness error in the archive_write_zip_data() function in archive_write_set_format_zip.c in libarchive(2) could lead to a buffer overflow on 64-bit machines. III. Impact An attacker who can provide input of their choice for creating a ZIP archive can cause a buffer overflow in libarchive(2) that results in a core dump or possibly execution of arbitrary code provided by the attacker. IV. Workaround No workaround is available but 32-bit systems are not vulnerable. V. Solution Perform one of the following: 1) Upgrade your vulnerable system to a supported FreeBSD stable or release / security branch (releng) dated after the correction date. Reboot is not required. 2) To update your vulnerable 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 A reboot is not required. 3) To update your vulnerable 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. # fetch https://security.FreeBSD.org/patches/SA-16:23/libarchive.patch # fetch https://security.FreeBSD.org/patches/SA-16:23/libarchive.patch.asc # gpg --verify libarchive.patch.asc b) Apply the patch. Execute the following commands as root: # cd /usr/src # patch < /path/to/patch c) Recompile the operating system using buildworld and installworld as described in . Restart the applicable daemons, or reboot the system. VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - ------------------------------------------------------------------------- stable/9/ r300363 releng/9.3/ r301044 - ------------------------------------------------------------------------- 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: VII. References The latest revision of this advisory is available at -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJXTcSUAAoJEO1n7NZdz2rnjuwP/36GShkMxVtvEF3LeZCtT1bT J0TSoXWpOo8rW61W0VEQ8xxOupIUwpDC2zwvgg0ZuPPbUY1nKYGrql8hixzmyg7n Da7krIxv7guTrpIWumEztS7JAVjZWEW+SfwiXZ7OY+3KHSLcGh5E0MpEvWDy+Ysa 5/fjyaxYV2jHCaXwqNpCHv9ahS3Ca4VMr37E2H+3efdbSzkfUz17nReNjBtk8P76 5teuC/PZ0aXIToOBuP039NPy7Cw42AsgAnEDLayEMIuuq/u4JVmDUONcnjfQ4occ tlCl3tNmk8LR9kotcvkg+7ZDOZ6zq4NHkcpjek8GPqScV2EgY0wixf4Eo2hD4P4x NDo4pkzt5L+6mkJoSc/6zBYiVGLAqGBMDqsaemqBL/aTLH6+W+Bulvr9prfB2EIN EBWfO4zkA3tKAPAZIpCQRzG2FScOjNeH49hy+ISTUWYcWDtNrpYIJdhX+XtsuZIt Swd++AYcvnDJGX8bTPRb8nOlBWqAAscuIJsvyqyRVahmKrG2USECmhvaIN6jPbVq 8dScr0yO0ixzUpnkEMV8GW8kstC5mwCihJ4MG5qDtsWGYybH93N22eHZyOlCqa9J d+V8OzEiVEtGtdDqbThDW3FfuimAm6aShTLxATeJTGbc+mQEdUMjjgAmrvCZxcEZ URXCjA5XayDc0iZySd4r =XTv8 -----END PGP SIGNATURE-----