Red Hat Linux General Security Advisory

Red Hat, Inc. Security Advisory Synopsis Updated bind packages fixing DoS attack available Advisory ID RHSA-2000:107-04 Issue Date 2000-11-11 Updated On 2000-11-27 Product Red Hat Linux Keywords bind DoS denial of service attack exploit security Cross References N/A 1. Topic: A remote DoS (denial of service) attack is possible with bind versions prior to 8.2.2_P7. 2000-11-12: Added bind-devel, bind-utils packages to package list. 2000-11-27: Added packages for Red Hat Linux 7 for Alpha 2. Problem description: A bug in bind 8.2.2_P5 allows for a denial of service attack. If named is open to zone transfers and recursive resolving, it will crash after a ZXFR for the authoritative zone and a query of a remote hostname. 3. Bug IDs fixed: (see bugzilla for more information) 20546 - bind 8.2.2-P5 remote DoS 4. Relevant releases/architectures: Red Hat Linux 5.2 - i386, alpha, sparc Red Hat Linux 6.0 - i386, alpha, sparc Red Hat Linux 6.1 - i386, alpha, sparc Red Hat Linux 6.2 - i386, alpha, sparc Red Hat Linux 7.0 - i386, alpha 5. RPMs required: Red Hat Linux 5.2: alpha: ftp://updates.redhat.com/5.2/en/os/alpha/bind-8.2.2_P7-0.5.2.alpha.rpm ftp://updates.redhat.com/5.2/en/os/alpha/bind-devel-8.2.2_P7-0.5.2.alpha.rpm ftp://updates.redhat.com/5.2/en/os/alpha/bind-utils-8.2.2_P7-0.5.2.alpha.rpm sparc: ftp://updates.redhat.com/5.2/en/os/sparc/bind-8.2.2_P7-0.5.2.sparc.rpm ftp://updates.redhat.com/5.2/en/os/sparc/bind-devel-8.2.2_P7-0.5.2.sparc.rpm ftp://updates.redhat.com/5.2/en/os/sparc/bind-utils-8.2.2_P7-0.5.2.sparc.rpm i386: ftp://updates.redhat.com/5.2/en/os/i386/bind-8.2.2_P7-0.5.2.i386.rpm ftp://updates.redhat.com/5.2/en/os/i386/bind-devel-8.2.2_P7-0.5.2.i386.rpm ftp://updates.redhat.com/5.2/en/os/i386/bind-utils-8.2.2_P7-0.5.2.i386.rpm sources: ftp://updates.redhat.com/5.2/en/os/SRPMS/bind-8.2.2_P7-0.5.2.src.rpm Red Hat Linux 6.0: sparc: ftp://updates.redhat.com/6.0/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.0/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.0/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm i386: ftp://updates.redhat.com/6.0/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.0/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.0/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm alpha: ftp://updates.redhat.com/6.0/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.0/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.0/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm sources: ftp://updates.redhat.com/6.0/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm Red Hat Linux 6.1: alpha: ftp://updates.redhat.com/6.1/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.1/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.1/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm sparc: ftp://updates.redhat.com/6.1/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.1/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.1/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm i386: ftp://updates.redhat.com/6.1/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.1/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.1/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm sources: ftp://updates.redhat.com/6.1/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm Red Hat Linux 6.2: alpha: ftp://updates.redhat.com/6.2/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.2/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm ftp://updates.redhat.com/6.2/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm sparc: ftp://updates.redhat.com/6.2/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.2/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm ftp://updates.redhat.com/6.2/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm i386: ftp://updates.redhat.com/6.2/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.2/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm ftp://updates.redhat.com/6.2/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm sources: ftp://updates.redhat.com/6.2/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm Red Hat Linux 7.0: alpha: ftp://updates.redhat.com/7.0/en/os/alpha/bind-8.2.2_P7-2.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/bind-devel-8.2.2_P7-2.alpha.rpm ftp://updates.redhat.com/7.0/en/os/alpha/bind-utils-8.2.2_P7-2.alpha.rpm i386: ftp://updates.redhat.com/7.0/en/os/i386/bind-8.2.2_P7-1.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/bind-devel-8.2.2_P7-1.i386.rpm ftp://updates.redhat.com/7.0/en/os/i386/bind-utils-8.2.2_P7-1.i386.rpm sources: ftp://updates.redhat.com/7.0/en/os/SRPMS/bind-8.2.2_P7-1.src.rpm ftp://updates.redhat.com/7.0/en/os/SRPMS/bind-8.2.2_P7-2.src.rpm 6. Solution: For each RPM for your particular architecture, run: rpm -Fvh [filename] where filename is the name of the RPM. Disabling zone transfers to non-trusted hosts by adding allow-transfer { trusted-hosts; }; to /etc/named.conf prevents the exploit from working on older releases, however, this does not fix the problem. 7. Verification: MD5 sum Package Name ------------------------------------------------------------------------- a8384e027a701ac18c222e8cf692d1bb 5.2/en/os/SRPMS/bind-8.2.2_P7-0.5.2.src.rpm 1a9d82ed254a4316000b0951870b7a1a 5.2/en/os/alpha/bind-8.2.2_P7-0.5.2.alpha.rpm 7fd21b8d27d13dd83297abd1b607030f 5.2/en/os/alpha/bind-devel-8.2.2_P7-0.5.2.alpha.rpm fc75f73bc341839b01b9191c2735babd 5.2/en/os/alpha/bind-utils-8.2.2_P7-0.5.2.alpha.rpm 6fdd9dc50a075d82b457f6a1079cdef6 5.2/en/os/i386/bind-8.2.2_P7-0.5.2.i386.rpm 1084f39bc01bf97588c19a1f61fa8685 5.2/en/os/i386/bind-devel-8.2.2_P7-0.5.2.i386.rpm 016fbd1f68b9fdfcab4ada341c4f4623 5.2/en/os/i386/bind-utils-8.2.2_P7-0.5.2.i386.rpm 92801fa17e15665fab7ea18b9623ecd7 5.2/en/os/sparc/bind-8.2.2_P7-0.5.2.sparc.rpm 792eb5a0fc0ca87eac53dbfc103974e5 5.2/en/os/sparc/bind-devel-8.2.2_P7-0.5.2.sparc.rpm bff05c21bca820793f5bab316b8415c6 5.2/en/os/sparc/bind-utils-8.2.2_P7-0.5.2.sparc.rpm c663e471d722b6d59d147233c96466f9 6.0/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm 95c9a4aa98c5278195df5853ea0f8371 6.0/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm 59cdef039c4f88b565dcf4270be63403 6.0/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm b4615fd210c1c6dd11679d53e8b5a8a8 6.0/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm a6dc64455c83374894d1ac149d27f9ba 6.0/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm a0a66cba7a41dc0749bef145b8c76ffd 6.0/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm fae686fc3216eb767895a93601d69853 6.0/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm 29baa5949e4f67089e434148a4d1bf8c 6.0/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm 6f24075c04e8f00f8f802df8767cc0b8 6.0/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm 05590e20ba01a0f465a9df8234a7aace 6.0/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm c663e471d722b6d59d147233c96466f9 6.1/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm 95c9a4aa98c5278195df5853ea0f8371 6.1/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm 59cdef039c4f88b565dcf4270be63403 6.1/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm b4615fd210c1c6dd11679d53e8b5a8a8 6.1/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm a6dc64455c83374894d1ac149d27f9ba 6.1/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm a0a66cba7a41dc0749bef145b8c76ffd 6.1/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm fae686fc3216eb767895a93601d69853 6.1/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm 29baa5949e4f67089e434148a4d1bf8c 6.1/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm 6f24075c04e8f00f8f802df8767cc0b8 6.1/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm 05590e20ba01a0f465a9df8234a7aace 6.1/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm c663e471d722b6d59d147233c96466f9 6.2/en/os/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm 95c9a4aa98c5278195df5853ea0f8371 6.2/en/os/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm 59cdef039c4f88b565dcf4270be63403 6.2/en/os/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm b4615fd210c1c6dd11679d53e8b5a8a8 6.2/en/os/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm a6dc64455c83374894d1ac149d27f9ba 6.2/en/os/i386/bind-8.2.2_P7-0.6.2.i386.rpm a0a66cba7a41dc0749bef145b8c76ffd 6.2/en/os/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm fae686fc3216eb767895a93601d69853 6.2/en/os/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm 29baa5949e4f67089e434148a4d1bf8c 6.2/en/os/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm 6f24075c04e8f00f8f802df8767cc0b8 6.2/en/os/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm 05590e20ba01a0f465a9df8234a7aace 6.2/en/os/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm 9db3ab376d44984cf200a486c15fb267 7.0/en/os/SRPMS/bind-8.2.2_P7-1.src.rpm 89a2dd1030505115619d8c4a40e7add5 7.0/en/os/SRPMS/bind-8.2.2_P7-2.src.rpm db718ef4f38c5fd572ca5c0e3dc9d079 7.0/en/os/alpha/bind-8.2.2_P7-2.alpha.rpm da5747f5b31e563ec0d2a26a15fcf20d 7.0/en/os/alpha/bind-devel-8.2.2_P7-2.alpha.rpm b41501bb5a54db1876c045b9157bb7fd 7.0/en/os/alpha/bind-utils-8.2.2_P7-2.alpha.rpm 3ca7a0db5c91992478737bf7564ad148 7.0/en/os/i386/bind-8.2.2_P7-1.i386.rpm 2846b6dcd911cc6e3cc0c4ba3c3c3af2 7.0/en/os/i386/bind-devel-8.2.2_P7-1.i386.rpm 74e8f7ff624f8df88592265cbfba124b 7.0/en/os/i386/bind-utils-8.2.2_P7-1.i386.rpm These packages are GPG signed by Red Hat, Inc. for security. Our key is available at: http://www.redhat.com/about/contact.html You can verify each package with the following command: rpm --checksig filename If you only wish to verify that each package has not been corrupted or tampered with, examine only the md5sum with the following command: rpm --checksig --nogpg filename Note that you need RPM >= 3.0 to check GnuPG keys. 8. References: http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=20546