Red Hat Bugzilla – Bug 599066
ISC DHCP 4.1.1-P1 contains a pair of bug fixes including one for a security related bug
Last modified: 2010-11-10 15:11:52 EST
Created attachment 419080 [details]
Fixes for [ISC-Bugs #21152] and [ISC-Bugs #21253]
ISC DHCP 4.1.1-P1 is a patch release of ISC DHCP 4.1.1,
which contains a pair of bug fixes including
one for a security related bug.
- A bug was fixed that could cause the DHCPv6 server to advertise/assign a
previously allocated (active) lease to a client that has changed subnets,
despite being on different shared networks. Dynamic prefixes specifically
allocated in shared networks also now are not offered if the client has
moved. [ISC-Bugs #21152]
! Accept a client id of length 0 while hashing. Previously the server would
exit if it attempted to hash a zero length client id, providing attackers
with a simple denial of service attack. [ISC-Bugs #21253]
Version-Release number of selected component (if applicable):
This request was evaluated by Red Hat Product Management for inclusion in a Red
Hat Enterprise Linux major release. Product Management has requested further
review of this request by Red Hat Engineering, for potential inclusion in a Red
Hat Enterprise Linux Major release. This request is not yet committed for
I'm not sure how to reproduce those two bugs.
I was unsuccessful in configuring client to send zero length client ID ([ISC-Bugs #21253]).
send dhcp-client-identifier "";
or something similar into dhclient.conf doesn't work.
Fixed in dhcp-4.1.1-11.P1.el6
Red Hat Enterprise Linux 6.0 is now available and should resolve
the problem described in this bug report. This report is therefore being closed
with a resolution of CURRENTRELEASE. You may reopen this bug report if the
solution does not work for you.