A flaw in ISC BIND was reported where, if specific combinations of RDATA are loaded into a nameserver, either via cache or an authoritative zone, a subsequent query for a related record will cause named to lock up. This vulnerability can be exploited remotely against recursive servers by inducing them to query for records provided by an authoritative server. It affects authoritative servers if one of the combinations of resource records is loaded from file, provided via zone transfer, or submitted to a zone via dynamic update. Once bind becomes locked-up due to the above issue, it will not respond to queries or control commands. Normal functionality can only be restored by restarting named. Workaround: Setting the option 'minimal-responses' to 'yes' will prevent the lockup.
External References: https://kb.isc.org/article/AA-00801
Created attachment 624300 [details] diff of bind-9.6-ESV-R7-P3 to P4 The relevant bits of the diff between versions with this changelog entry: 3383. [security] A certain combination of records in the RBT could cause named to hang while populating the additional section of a response. [RT #31090]
This issue affects the version of bind as shipped with Red Hat Enterprise Linux 5 and 6. This issue affects the version of bind97 as shipped with Red Hat Enterprise Linux 5. This issue affects the version of bind as shipped with Fedora 16 and Fedora 17
Created bind tracking bugs for this issue Affects: fedora-all [bug 864756]
This issue has been addressed in following products: Red Hat Enterprise Linux 4 Extended Lifecycle Support Via RHSA-2012:1365 https://rhn.redhat.com/errata/RHSA-2012-1365.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Via RHSA-2012:1364 https://rhn.redhat.com/errata/RHSA-2012-1364.html
This issue has been addressed in following products: Red Hat Enterprise Linux 5 Red Hat Enterprise Linux 6 Via RHSA-2012:1363 https://rhn.redhat.com/errata/RHSA-2012-1363.html
dhcp-4.2.4-16.P2.fc17, bind-dyndb-ldap-1.1.0-0.15.rc1.fc17, bind-9.9.2-2.fc17, dnsperf-2.0.0.0-2.fc17 has been pushed to the Fedora 17 stable repository. If problems still persist, please make note of it in this bug report.
dhcp-4.2.4-18.P2.fc18, bind-dyndb-ldap-2.0-0.3.20121009git6a86b1.fc18, bind-9.9.2-2.fc18, dnsperf-2.0.0.0-3.fc18 has been pushed to the Fedora 18 stable repository. If problems still persist, please make note of it in this bug report.
dhcp-4.2.4-4.P2.fc16, bind-dyndb-ldap-1.1.0-0.15.rc1.fc16, bind-9.8.4-2.fc16, dnsperf-2.0.0.0-2.fc16 has been pushed to the Fedora 16 stable repository. If problems still persist, please make note of it in this bug report.