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A remote DoS (denial of service) attack is possible with bind versions
prior to 8.
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Red Hat, Inc. Security Advisory
Synopsis: Updated bind packages fixing DoS attack available
Advisory ID: RHSA-2000:107-01
Issue date: 2000-11-11
Updated on: 2000-11-11
Product: Red Hat Linux
Keywords: bind DoS denial of service attack exploit security
Cross references: N/A
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1. Topic:
A remote DoS (denial of service) attack is possible with bind versions
prior to 8.2.2_P7.
2. 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 6.2EE - i386, alpha, sparc
Red Hat Linux 7.0 - i386, alpha, sparc
Red Hat Linux 7.0J - i386, alpha, sparc
3. 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.
4. 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.
5. Bug IDs fixed (http://bugzilla.redhat.com/bugzilla for more info):
20546 - bind 8.2.2-P5 remote DoS
6. RPMs required:
Red Hat Linux 5.2:
alpha:
ftp://updates.redhat.com/5.2/alpha/bind-8.2.2_P7-0.5.2.alpha.rpm
sparc:
ftp://updates.redhat.com/5.2/sparc/bind-8.2.2_P7-0.5.2.sparc.rpm
i386:
ftp://updates.redhat.com/5.2/i386/bind-8.2.2_P7-0.5.2.i386.rpm
sources:
ftp://updates.redhat.com/5.2/SRPMS/bind-8.2.2_P7-0.5.2.src.rpm
Red Hat Linux 6.0:
sparc:
ftp://updates.redhat.com/6.0/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
i386:
ftp://updates.redhat.com/6.0/i386/bind-8.2.2_P7-0.6.2.i386.rpm
alpha:
ftp://updates.redhat.com/6.0/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
sources:
ftp://updates.redhat.com/6.0/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
Red Hat Linux 6.1:
sparc:
ftp://updates.redhat.com/6.1/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
i386:
ftp://updates.redhat.com/6.1/i386/bind-8.2.2_P7-0.6.2.i386.rpm
alpha:
ftp://updates.redhat.com/6.1/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
sources:
ftp://updates.redhat.com/6.1/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
Red Hat Linux 6.2:
alpha:
ftp://updates.redhat.com/6.2/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
sparc:
ftp://updates.redhat.com/6.2/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
i386:
ftp://updates.redhat.com/6.2/i386/bind-8.2.2_P7-0.6.2.i386.rpm
sources:
ftp://updates.redhat.com/6.2/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
Red Hat Linux 7.0:
alpha:
ftp://updates.redhat.com/7.0/alpha/bind-8.2.2_P7-1.alpha.rpm
sparc:
ftp://updates.redhat.com/7.0/sparc/bind-8.2.2_P7-1.sparc.rpm
i386:
ftp://updates.redhat.com/7.0/i386/bind-8.2.2_P7-1.i386.rpm
sources:
ftp://updates.redhat.com/7.0/SRPMS/bind-8.2.2_P7-1.src.rpm
7. Verification:
MD5 sum Package Name
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a8384e027a701ac18c222e8cf692d1bb 5.2/SRPMS/bind-8.2.2_P7-0.5.2.src.rpm
1a9d82ed254a4316000b0951870b7a1a 5.2/alpha/bind-8.2.2_P7-0.5.2.alpha.rpm
6fdd9dc50a075d82b457f6a1079cdef6 5.2/i386/bind-8.2.2_P7-0.5.2.i386.rpm
92801fa17e15665fab7ea18b9623ecd7 5.2/sparc/bind-8.2.2_P7-0.5.2.sparc.rpm
c663e471d722b6d59d147233c96466f9 6.0/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
95c9a4aa98c5278195df5853ea0f8371 6.0/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba 6.0/i386/bind-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c 6.0/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
c663e471d722b6d59d147233c96466f9 6.1/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
95c9a4aa98c5278195df5853ea0f8371 6.1/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba 6.1/i386/bind-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c 6.1/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
c663e471d722b6d59d147233c96466f9 6.2/SRPMS/bind-8.2.2_P7-0.6.2.src.rpm
95c9a4aa98c5278195df5853ea0f8371 6.2/alpha/bind-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba 6.2/i386/bind-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c 6.2/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
9db3ab376d44984cf200a486c15fb267 7.0/SRPMS/bind-8.2.2_P7-1.src.rpm
cdaad5917739f5c20e4d01a37750386d 7.0/alpha/bind-8.2.2_P7-1.alpha.rpm
3ca7a0db5c91992478737bf7564ad148 7.0/i386/bind-8.2.2_P7-1.i386.rpm
105382156bffc1543e3907b12c2a417c 7.0/sparc/bind-8.2.2_P7-1.sparc.rpm
These packages are GPG signed by Red Hat, Inc. for security. Our key
is available at:
http://www.redhat.com/corp/contact.html
You can verify each package with the following command:
rpm --checksig
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
8. References:
http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=20546
Copyright(c) 2000 Red Hat, Inc.
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