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BIND Negative Cache Poisoning Vulnerability
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Secunia Advisory:
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SA10300
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Release Date:
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2003-11-27
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Last Update:
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2003-12-02
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Popularity:
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14,158 views
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Critical:
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Not critical
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Impact:
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DoS
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Where:
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From local network
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Solution Status:
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Vendor Patch
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| Software: | ISC BIND 8.x.x
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Subscribe:
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Instant alerts on relevant vulnerabilities 
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| CVE reference: | CVE-2003-0914
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Description:
ISC has released a new version of BIND 8, which fixes a vulnerability allowing malicious people to poison the DNS cache.
The problem is that negative answers may be cached from the wrong source. This can be exploited to cause a "Denial of Service" against certain domains, because BIND will read the wrongly cached negative answer instead of querying the right source.
Solution:
A DNS cache should only be accessible from specified IP addresses. A proper firewall filter will limit the possibilities of sending spoofed or fake answers to the DNS cache.
ISC has released BIND 8.3.7 and 8.4.3:
ftp://ftp.isc.org/isc/bind/src/8.3.7/
ftp://ftp.isc.org/isc/bind/src/8.4.3/
http://www.isc.org/products/BIND/bind8.html
Changelog:
2003-12-02: Added link to CERT vulnerability note.
Original Advisory:
http://www.isc.org/products/BIND/bind8.html
Other References:
CERT VU#734644:
http://www.kb.cert.org/vuls/id/734644
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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