Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2014.0054 bsnmpd remote denial of service vulnerability 15 January 2014 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: bsnmpd Publisher: FreeBSD Operating System: FreeBSD Impact/Access: Execute Arbitrary Code/Commands -- Remote/Unauthenticated Denial of Service -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2014-1452 Original Bulletin: ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-14:01.bsnmpd.asc - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- Hash: SHA512 ============================================================================= FreeBSD-SA-14:01.bsnmpd Security Advisory The FreeBSD Project Topic: bsnmpd remote denial of service vulnerability Category: contrib Module: bsnmp Announced: 2014-01-14 Credits: Dirk Meyer Affects: All supported versions of FreeBSD. Corrected: 2014-01-14 19:02:14 UTC (stable/10, 10.0-PRERELEASE) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RELEASE) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC5-p1) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC4-p1) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC3-p1) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC2-p1) 2014-01-14 19:10:38 UTC (releng/10.0, 10.0-RC1-p1) 2014-01-14 19:17:20 UTC (stable/9, 9.2-STABLE) 2014-01-14 19:42:28 UTC (releng/9.2, 9.2-RELEASE-p3) 2014-01-14 19:42:28 UTC (releng/9.1, 9.1-RELEASE-p10) 2014-01-14 19:17:20 UTC (stable/8, 8.4-STABLE) 2014-01-14 19:42:28 UTC (releng/8.4, 8.4-RELEASE-p7) 2014-01-14 19:42:28 UTC (releng/8.3, 8.3-RELEASE-p14) CVE Name: CVE-2014-1452 For general information regarding FreeBSD Security Advisories, including descriptions of the fields above, security branches, and the following sections, please visit <URL:http://security.FreeBSD.org/>. I. Background The bsnmpd is a simple and extensible SNMP daemon serves the Internet SNMP (Simple Network Management Protocol). II. Problem Description The bsnmpd(8) daemon is prone to a stack-based buffer-overflow when it has received a specifically crafted GETBULK PDU request. III. Impact This issue could be exploited to execute arbitrary code in the context of the service daemon, or crash the service daemon, causing a denial-of-service. IV. Workaround No workaround is available, but systems not running bsnmpd(8) 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. 2) 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 http://security.FreeBSD.org/patches/SA-14:01/bsnmpd.patch # fetch http://security.FreeBSD.org/patches/SA-14:01/bsnmpd.patch.asc # gpg --verify bsnmpd.patch.asc b) Execute the following commands as root: # cd /usr/src # patch < /path/to/patch Recompile the operating system using buildworld and installworld as described in <URL:http://www.FreeBSD.org/handbook/makeworld.html>. Restart the bsnmpd(8) daemons, or reboot the system. 3) 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 VI. Correction details The following list contains the correction revision numbers for each affected branch. Branch/path Revision - - ------------------------------------------------------------------------- stable/8/ r260642 releng/8.3/ r260647 releng/8.4/ r260647 stable/9/ r260642 releng/9.1/ r260647 releng/9.2/ r260647 stable/10/ r260638 releng/10.0/ r260640 - - ------------------------------------------------------------------------- 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 <other info on vulnerability> <URL:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-1452> The latest revision of this advisory is available at <URL:http://security.FreeBSD.org/advisories/FreeBSD-SA-14:01.bsnmpd.asc> - -----BEGIN PGP SIGNATURE----- iQIcBAEBCgAGBQJS1ZS6AAoJEO1n7NZdz2rnDXwP/1iQmuO8VLjZoD3LMpiHyA/i YgwjX5x9XT2MyVrRmu+nHaCG3ZDC4/IV72/jCzV8udQJ1RF6Aswhuk6mXI7oatol OYF27JnRVAJQjAvXw3zMsp4hLv631TvgO1Az1vK7f1pX8bDC/eBTaiCH7I6QBYGS E4Fsi2MwOWIRyglTjlFSL8Wb2yQmzkKCx/EVFF/6mRC7l3a9pkHf5VKQtut1KYFu 5QF5cG5anur4daP4w45yWsl0qkRDO5mJdpD+S3NtzydluWzz/Dk/0laS5wB+LLzV cXC5/GR/acQhO+MvDIDT4Emra2OXzsheEahOJhLKHsBF8pHBi5IldkVwQmme76/g aR1gLSFJ5LYcpAgBQgeWKXXCAol5zNRCR8v8IBnV2+rYRSrIdl5lstgVmla++xJD +bC7PbTqcLlyFGrMEvd/mAvX1PVa9BVYtaxXA5QZq5EHP7nsKotcAk7/kouVfmao Gdxlt7YjRic6D/WqF8RFiQv9ezpbEnMQ1BwOCSUEJasXlyxJXYA6vva7tyM3OmyD c2I9JLeV8aCUgIf3s+HoGcZhz01kmu9REQ/OEDtiN8kX94WOzpectf8V5g+JnxRd HoOfcvrChohL4nla+3RvG1LJo5KD5N09yHnV2y3LjxTdKu9Hw4ATzFwmPmEUqUfG eF12aO4PVp42wYWNHtGe =xZTc - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBUtXiihLndAQH1ShLAQIRsBAAm0BatGuZgCillOD9QA5ScFeYVSzjGYku x70npwfh4kby13RMtjRr9zkztkqottEfw9UsnqseWyHyMlm/icolxrkSEoG53HgN VzL50A6WOp9lgSQaUewQQqYbEiIMNGG0gZQmnbYkaLYITihavMs0ZPv18974nmr8 2If9Pi0i0lVDqR3PehHGiBhhzZz8PvoQVfYrC1pah3OFpFM12jixYnn0ARU9ZoTB a3Z/dJT2TQrOev7C8pulhuxi7wraRrpBVzLG91/p7Atb2WGSwlDdZGzDS1fLjRWI ZkAahXHJyTr+nNXBQ1e32XRpbNHcgreZlOD9l5KiuuF4tXoBNXKMDYjqUmWh4KQd 6EXGYAMGoQZre/I0zAjL7ICa3KahoCNLsRdjEMetuFWgw/eip1jKn8EFUNxMVCWm /r4GK28HLutQxDuLzgKg6NiUwzJjvu958Rfc+ltMwtHhkl3+2BeophsrouZvNWZs k2szz9aO0KoAkBkNHtdO5LVlsUBxF6eXS6jCnjRXc5xnrlBmcJpP2WSYOFBoDrC5 lstAGaGM8+9ImIFSGiHe+T50Ub7iQogpeGA7y8xnirq3NrdfPoULd9KfNB0iY4Su cV46Rd+ZV6asPLjDnfHxzuEnJDLUqjjb2QDFiEgEDzx6XPXKqJwtjOoEe2G1Jk1O J4cEvj5ltGg= =cN7X -----END PGP SIGNATURE-----