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BIND Zone Transfer TSIG Handling Denial of Service
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Secunia Advisory:
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SA19808
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Release Date:
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2006-04-26
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Last Update:
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2006-05-03
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Popularity:
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11,448 views
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Critical:
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Less critical
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Impact:
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DoS
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Where:
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From remote
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Solution Status:
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Unpatched
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| Software: | ISC BIND 4.x.x
ISC BIND 8.x.x
ISC BIND 9.2.x
ISC BIND 9.3.x
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| CVE reference: | CVE-2006-2073
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Description:
A vulnerability been reported in ISC BIND, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the handling of the TSIG in the second or subsequent messages in a zone transfer. This can be exploited to crash "named" via a malformed TSIG in the messages.
Successful exploitation requires that the first zone transfer message have a valid TSIG.
Solution:
The vulnerability will reportedly be fixed in a future release.
Do not accept zone-transfers from non-trusted nameservers.
Provided and/or discovered by:
Reported by vendor based on DNS Test Tool created by Oulu University Secure Programming Group.
Changelog:
2006-05-03: Added CVE reference.
Original Advisory:
NISCC:
http://www.niscc.gov.uk/niscc/docs/re-20060425-00312.pdf?lang=en
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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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