The BIND 9.9.6-P1 and 9.10.1-P1 release fix the following flaw: "" By making use of maliciously-constructed zones or a rogue server, an attacker can exploit an oversight in the code BIND 9 uses to follow delegations in the Domain Name Service, causing BIND to issue unlimited queries in an attempt to follow the delegation. This can lead to resource exhaustion and denial of service (up to and including termination of the named server process.) All recursive resolvers are affected. Authoritative servers can be affected if an attacker can control a delegation traversed by the authoritative server in servicing the zone. "" It is reported that versions 9.0.x to 9.8.x, 9.9.0 to 9.9.6, and 9.10.0 to 9.10.1 are affected. External References: https://kb.isc.org/article/AA-01216/74/CVE-2014-8500%3A-A-Defect-in-Delegation-Handling-Can-Be-Exploited-to-Crash-BIND.html
Created bind tracking bugs for this issue: Affects: fedora-all [bug 1171913]
Upstream commits for bind 9.9: https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commitdiff;h=603a0e2637b35a2da820bc807f69bcf09c682dce https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commitdiff;h=711e833921d3dd67df7515438e152bbfdb2c1249
(In reply to Tomas Hoger from comment #8) > Upstream commits for bind 9.9: > > https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commitdiff; > h=603a0e2637b35a2da820bc807f69bcf09c682dce > https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commitdiff; > h=711e833921d3dd67df7515438e152bbfdb2c1249 Also: https://source.isc.org/cgi-bin/gitweb.cgi?p=bind9.git;a=commit;h=6cd340997bad88472dfd80b86192a57205ab1c8e
This issue has been addressed in the following products: Red Hat Enterprise Linux 5 Via RHSA-2014:1985 https://rhn.redhat.com/errata/RHSA-2014-1985.html
This issue has been addressed in the following products: Red Hat Enterprise Linux 6 Red Hat Enterprise Linux 7 Red Hat Enterprise Linux 5 Via RHSA-2014:1984 https://rhn.redhat.com/errata/RHSA-2014-1984.html
Advisory from the original reporter ANSSI, the French Network and Information Security Agency: http://www.ssi.gouv.fr/en/the-anssi/events/vulnerabilty-disclosure-the-infinitely-delegating-name-servers-idns-attack.html
bind-9.9.4-17.P2.fc20 has been pushed to the Fedora 20 stable repository. If problems still persist, please make note of it in this bug report.
bind-9.9.6-5.P1.fc21 has been pushed to the Fedora 21 stable repository. If problems still persist, please make note of it in this bug report.
bind-9.9.3-16.P2.fc19 has been pushed to the Fedora 19 stable repository. If problems still persist, please make note of it in this bug report.
This issue has been addressed in the following products: Red Hat Enterprise Linux 6.5 AUS - Server Only Red Hat Enterprise Linux 6.4 AUS - Server Only Via RHSA-2016:0078 https://rhn.redhat.com/errata/RHSA-2016-0078.html