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-----BEGIN PGP SIGNED MESSAGE----- =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2000.039 -- FreeBSD-SA-00:05 MySQL allows bypassing of password authentication 07 March 2000 =========================================================================== FreeBSD have released the following advisory describing a vulnerability in the MySQL package which is part of the FreeBSD ports collection and also a commonly installed database package. This vulnerability may give an intruder the ability to modify, add or delete records in MySQL databases. - --------------------------BEGIN INCLUDED TEXT-------------------- - -----BEGIN PGP SIGNED MESSAGE----- ============================================================================= FreeBSD-SA-00:05 Security Advisory FreeBSD, Inc. Topic: MySQL allows bypassing of password authentication Category: ports Module: mysql322-server Announced: 2000-02-28 Affects: Ports collection before the correction date. Corrected: 2000-02-15 FreeBSD only: NO I. Background MySQL is a popular SQL database client/server distributed as part of the FreeBSD ports collection. II. Problem Description The MySQL database server (versions prior to 3.22.32) has a flaw in the password authentication mechanism which allows anyone who can connect to the server to access databases without requiring a password, given a valid username on the database - in other words, the normal password authentication mechanism can be completely bypassed. MySQL is not installed by default, nor is it "part of FreeBSD" as such: it is part of the FreeBSD ports collection, which contains over 3100 third-party applications in a ready-to-install format. FreeBSD makes no claim about the security of these third-party applications, although an effort is underway to provide a security audit of the most security-critical ports. III. Impact The successful attacker will have all of the access rights of that database user and may be able to read, add or modify records. If you have not chosen to install the mysql322-server port/package, then your system is not vulnerable. IV. Workaround Use appropriate access-control lists to limit which hosts can initiate connections to MySQL databases - see: http://www.mysql.com/Manual_chapter/manual_Privilege_system.html for more information. If unrestricted remote access to the database is not required, consider using ipfw(8) or ipf(8), or your network perimeter firewall, to prevent remote access to the database from untrusted machines (MySQL uses TCP port 3306 for network communication). Note that users who have access to machines which are allowed to initiate database connections (e.g. local users) can still exploit the security hole. V. Solution One of the following: 1) Upgrade your entire ports collection and rebuild the mysql322-server port. 2) Reinstall a new package obtained from: ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-3-stable/databases/mysql-server-3.22.32.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/i386/packages-4-current/databases/mysql-server-3.22.32.tgz ftp://ftp.FreeBSD.org/pub/FreeBSD/ports/alpha/packages-4-current/databases/mysql-server-3.22.32.tgz 3) download a new port skeleton for the mysql322-server port from: http://www.freebsd.org/ports/ and use it to rebuild the port. 4) Use the portcheckout utility to automate option (3) above. The portcheckout port is available in /usr/ports/devel/portcheckout or the package can be obtained from: ftp://ftp.freebsd.org/pub/FreeBSD/ports/packages/devel/portcheckout-2.0.tgz - -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBOLtYEVUuHi5z0oilAQHtbwP/TF0hNZwrO/wAuBjYF8Eff5aDU1KtnA9D u0bcUakDgF/nODVxgOFZ1MfaK95PAhRqdYvtwssTqTXwlRB+PU0vtwjdt3p3l8d3 SixfhxT+Ys/v222jK+o6lJdxfKOC4chNDseboSRoCSLEESNl2NDGkBKezKSzzlng vzxtva695bI= =KYqf - -----END PGP SIGNATURE----- - --------------------------END INCLUDED TEXT-------------------- 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 use any or all of this information is the responsibility of each user or organisation, and should be done so in accordance with site policies and procedures. 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 original authors 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/Information/advisories.html If you believe that your system has been compromised, contact AusCERT or your representative in FIRST (Forum of Incident Response and Security Teams). Internet Email: email@example.com 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 emergencies. -----BEGIN PGP SIGNATURE----- Version: 2.6.3i Charset: noconv Comment: ftp://ftp.auscert.org.au/pub/auscert/AUSCERT_PGP.key iQCVAwUBOMy1pSh9+71yA2DNAQFWeAP+JUdLWBO+qiT3Fsr2XEeqq+skI1rt4JOc Yv4pU/zWZ7QydDcOyFJrphIdRXXeaYEYHTM3M8JGmA2u054SfIUxtiXo6Zvk0vha zjke2DRg23hbIT6oQTQY+6qwE1NcToqVnxBlO+Laecy8zdKC/G1OFHOfbrI0nvXi gxSUGmHdWb8= =TfJk -----END PGP SIGNATURE-----