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Home » Hacking News » MDKSA-2002:077 - bind update

MDKSA-2002:077 - bind update

by Nikola Strahija on November 17th, 2002 Several vulnerabilities were discovered in the BIND8 DNS server by ISS (Internet Security Services), including a remotely exploitable buffer overflow. The first vulnerability is how named handles SIG records; this buffer overflow can be exploited to obtain access to the victim host with the privilege of the user the named process is running as. By default, Mandrake Linux is configured to run the named process as the named user. To successfully exploit this vulnerability, the attacker must control an existing DNS domain and must be allowed to perform a recursive query.


A possible work-around is to restrict recursive requests, however
MandrakeSoft encourages all users to upgrade to the provided BIND9
packages. You can also completely disable recursion by adding
"recursion no;" to the options section of /etc/named.conf.

Several Denial of Service problems also exist in BIND8 that allow
attackers to terminate the named process. At least one of these
vulnerabilities seems to be exploitable even when the attacker is
not permitted to perform recursive queries, so the work-around noted
above is not effective against this DoS.

Both problems are not reported to effect BIND9. As Linux-Mandrake
7.2 and Single Network Firewall 7.2 are the only supported distributions
to still ship BIND8, we have elected to upgrade to both a patched
version of BIND8 and BIND9. The BIND8 packages contain the patch
ISC made available late on the 13th, contrary to their original
advisory which called for them to be made available next week. Despite
this, however, MandrakeSoft encourages everyone who is able to upgrade
to BIND9 rather than BIND8.

The MandrakeSoft security team wishes to apologize to MandrakeSoft
customers for not being able to provide timely fixes for this problem,
and regrets the inability of the ISC to work with the Internet community
at large to provide adequate protection to users of BIND.
________________________________________________________________________

References:

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1219
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1220
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2002-1221
http://www.kb.cert.org/vuls/id/852283
http://www.kb.cert.org/vuls/id/229595
http://www.isc.org/products/BIND/bind-security.html
http://bvlive01.iss.net/issEn/delivery/xforce/alertdetail.jsp?oid=21469
________________________________________________________________________

Updated Packages:

Linux-Mandrake 7.2:
f3ca1559f7d2fbe17a2ec6dab327bb7e 7.2/RPMS/bind-8.3.3-2.1mdk.i586.rpm
0ccd937ec59aa9775f79b05f62d4718c 7.2/RPMS/bind-9.2.1-2.3mdk.i586.rpm
783ab2327c7e7983a07a8043d3355bbb 7.2/RPMS/bind-devel-8.3.3-2.1mdk.i586.rpm
bbf717f0f71098ab6c2293d9dbd1c1bd 7.2/RPMS/bind-devel-9.2.1-2.3mdk.i586.rpm
47a2418adcd190b22956407a667fbc9e 7.2/RPMS/bind-utils-8.3.3-2.1mdk.i586.rpm
56b9c086c299cdfd367ae87f14db711b 7.2/RPMS/bind-utils-9.2.1-2.3mdk.i586.rpm
df34fbecce2e6c61695fcee11a525fea 7.2/RPMS/caching-nameserver-8.1-3.2mdk.noarch.rpm
f9d914230ec37be01ad4d00abcde0280 7.2/SRPMS/bind-8.3.3-2.1mdk.src.rpm
8660bd628168c52478b0f766d0ab676c 7.2/SRPMS/bind-9.2.1-2.3mdk.src.rpm
904b9064763803d24afc79e7140146a4 7.2/SRPMS/caching-nameserver-8.1-3.2mdk.src.rpm

Single Network Firewall 7.2:
f3ca1559f7d2fbe17a2ec6dab327bb7e snf7.2/RPMS/bind-8.3.3-2.1mdk.i586.rpm
0ccd937ec59aa9775f79b05f62d4718c snf7.2/RPMS/bind-9.2.1-2.3mdk.i586.rpm
47a2418adcd190b22956407a667fbc9e snf7.2/RPMS/bind-utils-8.3.3-2.1mdk.i586.rpm
56b9c086c299cdfd367ae87f14db711b snf7.2/RPMS/bind-utils-9.2.1-2.3mdk.i586.rpm
df34fbecce2e6c61695fcee11a525fea snf7.2/RPMS/caching-nameserver-8.1-3.2mdk.noarch.rpm
f9d914230ec37be01ad4d00abcde0280 snf7.2/SRPMS/bind-8.3.3-2.1mdk.src.rpm
8660bd628168c52478b0f766d0ab676c snf7.2/SRPMS/bind-9.2.1-2.3mdk.src.rpm
904b9064763803d24afc79e7140146a4 snf7.2/SRPMS/caching-nameserver-8.1-3.2mdk.src.rpm
________________________________________________________________________

Bug IDs fixed (see https://qa.mandrakesoft.com for more information):
________________________________________________________________________

To upgrade automatically, use MandrakeUpdate. The verification of md5
checksums and GPG signatures is performed automatically for you.

If you want to upgrade manually, download the updated package from one
of our FTP server mirrors and upgrade with "rpm -Fvh *.rpm". A list of
FTP mirrors can be obtained from:

http://www.mandrakesecure.net/en/ftp.php

Please verify the update prior to upgrading to ensure the integrity of
the downloaded package. You can do this with the command:

rpm --checksig

All packages are signed by MandrakeSoft for security. You can obtain
the GPG public key of the Mandrake Linux Security Team from:

https://www.mandrakesecure.net/RPM-GPG-KEYS

Please be aware that sometimes it takes the mirrors a few hours to
update.

You can view other update advisories for Mandrake Linux at:

http://www.mandrakesecure.net/en/advisories/

MandrakeSoft has several security-related mailing list services that
anyone can subscribe to. Information on these lists can be obtained by
visiting:

http://www.mandrakesecure.net/en/mlist.php

If you want to report vulnerabilities, please contact

security_linux-mandrake.com

Type Bits/KeyID Date User ID
pub 1024D/22458A98 2000-07-10 Linux Mandrake Security Team


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