Debian Security Advisory

DLA-1264-1 unbound -- LTS security update

Date Reported:
30 Jan 2018
Affected Packages:
Security database references:
In the Debian bugtracking system: Bug 887733.
In Mitre's CVE dictionary: CVE-2017-15105.
More information:

Ralph Dolmans and Karst Koymans found a flaw in the way unbound validated wildcard-synthesized NSEC records. An improperly validated wildcard NSEC record could be used to prove the non-existence (NXDOMAIN answer) of an existing wildcard record, or trick unbound into accepting a NODATA proof.

For more information please refer to the upstream advisory at

For Debian 7 Wheezy, these problems have been fixed in version 1.4.17-3+deb7u3.

We recommend that you upgrade your unbound packages.

Further information about Debian LTS security advisories, how to apply these updates to your system and frequently asked questions can be found at: