- rc.d script now generates the unbound-control keys if they don't exist
and the sample config file is patched to enable this, various rc.d/unbound
actions depend on this, pointed out/ok aja@
jakob@ and myself. See http://www.unbound.net/downloads/CVE-2011-4528.txt
for more details, summary from the above is below:
--
Unbound crashes when confronted with a non-standard response from a
server for a domain. This domain produces duplicate RRs from a certain
type and is DNSSEC signed.Unbound also crashes when confronted with a
query that eventually, and under specific circumstances, resolves to a
domain that misses expected NSEC3 records.
These two problems were discovered within 24 hours, hence a combined
vulnerability disclosure.
By constructing the non standard responses an attacker can use these
vulnerabilities for a DOS attack.
To our knowledge 'denial of service' is the only type of exploit possible.
--
