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                   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
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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. 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

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  ( for more info):

20546 - bind 8.2.2-P5 remote DoS


6. RPMs required:

Red Hat Linux 5.2:

alpha: 
 
 

sparc: 
 
 

i386: 
 
 

sources: 

Red Hat Linux 6.0:

sparc: 
 
 

i386: 
 
 

alpha: 
 
 

sources: 

Red Hat Linux 6.1:

alpha: 
 
 

sparc: 
 
 

i386: 
 
 

sources: 

Red Hat Linux 6.2:

alpha: 
 
 

sparc: 
 
 

i386: 
 
 

sources: 

Red Hat Linux 7.0:

alpha: 
 
 

i386: 
 
 

sources: 
 

7. Verification:


MD5 sum                           Package Name
--------------------------------------------------------------------------
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
7fd21b8d27d13dd83297abd1b607030f  5.2/alpha/bind-devel-8.2.2_P7-0.5.2.alpha.rpm
fc75f73bc341839b01b9191c2735babd  5.2/alpha/bind-utils-8.2.2_P7-0.5.2.alpha.rpm
6fdd9dc50a075d82b457f6a1079cdef6  5.2/i386/bind-8.2.2_P7-0.5.2.i386.rpm
1084f39bc01bf97588c19a1f61fa8685  5.2/i386/bind-devel-8.2.2_P7-0.5.2.i386.rpm
016fbd1f68b9fdfcab4ada341c4f4623  5.2/i386/bind-utils-8.2.2_P7-0.5.2.i386.rpm
92801fa17e15665fab7ea18b9623ecd7  5.2/sparc/bind-8.2.2_P7-0.5.2.sparc.rpm
792eb5a0fc0ca87eac53dbfc103974e5  5.2/sparc/bind-devel-8.2.2_P7-0.5.2.sparc.rpm
bff05c21bca820793f5bab316b8415c6  5.2/sparc/bind-utils-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
59cdef039c4f88b565dcf4270be63403  6.0/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm
b4615fd210c1c6dd11679d53e8b5a8a8  6.0/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba  6.0/i386/bind-8.2.2_P7-0.6.2.i386.rpm
a0a66cba7a41dc0749bef145b8c76ffd  6.0/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm
fae686fc3216eb767895a93601d69853  6.0/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c  6.0/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
6f24075c04e8f00f8f802df8767cc0b8  6.0/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm
05590e20ba01a0f465a9df8234a7aace  6.0/sparc/bind-utils-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
59cdef039c4f88b565dcf4270be63403  6.1/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm
b4615fd210c1c6dd11679d53e8b5a8a8  6.1/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba  6.1/i386/bind-8.2.2_P7-0.6.2.i386.rpm
a0a66cba7a41dc0749bef145b8c76ffd  6.1/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm
fae686fc3216eb767895a93601d69853  6.1/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c  6.1/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
6f24075c04e8f00f8f802df8767cc0b8  6.1/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm
05590e20ba01a0f465a9df8234a7aace  6.1/sparc/bind-utils-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
59cdef039c4f88b565dcf4270be63403  6.2/alpha/bind-devel-8.2.2_P7-0.6.2.alpha.rpm
b4615fd210c1c6dd11679d53e8b5a8a8  6.2/alpha/bind-utils-8.2.2_P7-0.6.2.alpha.rpm
a6dc64455c83374894d1ac149d27f9ba  6.2/i386/bind-8.2.2_P7-0.6.2.i386.rpm
a0a66cba7a41dc0749bef145b8c76ffd  6.2/i386/bind-devel-8.2.2_P7-0.6.2.i386.rpm
fae686fc3216eb767895a93601d69853  6.2/i386/bind-utils-8.2.2_P7-0.6.2.i386.rpm
29baa5949e4f67089e434148a4d1bf8c  6.2/sparc/bind-8.2.2_P7-0.6.2.sparc.rpm
6f24075c04e8f00f8f802df8767cc0b8  6.2/sparc/bind-devel-8.2.2_P7-0.6.2.sparc.rpm
05590e20ba01a0f465a9df8234a7aace  6.2/sparc/bind-utils-8.2.2_P7-0.6.2.sparc.rpm
9db3ab376d44984cf200a486c15fb267  7.0/SRPMS/bind-8.2.2_P7-1.src.rpm
89a2dd1030505115619d8c4a40e7add5  7.0/SRPMS/bind-8.2.2_P7-2.src.rpm
db718ef4f38c5fd572ca5c0e3dc9d079  7.0/alpha/bind-8.2.2_P7-2.alpha.rpm
da5747f5b31e563ec0d2a26a15fcf20d  7.0/alpha/bind-devel-8.2.2_P7-2.alpha.rpm
b41501bb5a54db1876c045b9157bb7fd  7.0/alpha/bind-utils-8.2.2_P7-2.alpha.rpm
3ca7a0db5c91992478737bf7564ad148  7.0/i386/bind-8.2.2_P7-1.i386.rpm
2846b6dcd911cc6e3cc0c4ba3c3c3af2  7.0/i386/bind-devel-8.2.2_P7-1.i386.rpm
74e8f7ff624f8df88592265cbfba124b  7.0/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:
     
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:
 
/show_bug.cgi?id=20546


Copyright(c) 2000 Red Hat, Inc.