FreeBSD VuXML: Documenting security issues in FreeBSD and the FreeBSD Ports Collection

dns/bind9* -- zero-length RDATA can cause named to terminate, reveal memory

Affected packages
bind99 <
bind98 <
bind97 <
bind96 <


VuXML ID 1ecc0d3f-ae8e-11e1-965b-0024e88a8c98
Discovery 2012-06-04
Entry 2012-06-04
Modified 2012-06-06

ISC reports:

Processing of DNS resource records where the rdata field is zero length may cause various issues for the servers handling them.

Processing of these records may lead to unexpected outcomes. Recursive servers may crash or disclose some portion of memory to the client. Secondary servers may crash on restart after transferring a zone containing these records. Master servers may corrupt zone data if the zone option "auto-dnssec" is set to "maintain". Other unexpected problems that are not listed here may also be encountered.

Impact: This issue primarily affects recursive nameservers. Authoritative nameservers will only be impacted if an administrator configures experimental record types with no data. If the server is configured this way, then secondaries can crash on restart after transferring that zone. Zone data on the master can become corrupted if the zone with those records has named configured to manage the DNSSEC key rotation.


CVE Name CVE-2012-1667