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DHCP "supersede_lease()" DHCPOFFER Denial of Service
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Secunia Advisory:
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SA21345
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Release Date:
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2006-08-04
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Popularity:
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7,220 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 local network
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Solution Status:
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Unpatched
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| Software: | ISC DHCP 2
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| CVE reference: | CVE-2006-3122
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Description:
A vulnerability has been reported in ISC DHCP, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error in the processing of DHCPOFFER packets in the "supersede_lease()" function in memory.c. This can be exploited to crash a vulnerable service by sending a packet with a 32 byte client-identifier option.
The vulnerability has been reported in version 2.0pl5. Other versions may also be affected.
Solution:
Upgrade to the latest version of DHCP 3.x.
http://www.isc.org/index.pl?/sw/dhcp/
DHCP 2.x is considered "end of life".
Provided and/or discovered by:
Justin Winschief and Andrew Steets
Original Advisory:
http://www.debian.org/security/2006/dsa-1143
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About this Secunia Advisory
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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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