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[SECURITY] [DLA 1676-1] unbound security update



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Package        : unbound
Version        : 1.4.22-3+deb8u4
CVE ID         : CVE-2017-15105
Debian Bug     : 887733

Ralph Dolmans and Karst Koymans found a flaw in the way unbound, a
validating, recursive, caching DNS resolver, 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
https://unbound.net/downloads/CVE-2017-15105.txt.

For Debian 8 "Jessie", this problem has been fixed in version
1.4.22-3+deb8u4.

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: https://wiki.debian.org/LTS
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