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Debian LTS Advisory ([SECURITY] [DLA 1676-1] unbound security update)
Information
Severity
Severity
Family
Family
CVSSv2 Base
CVSSv2 Base
CVSSv2 Vector
CVSSv2 Vector
Solution Type
Solution Type
Created
Created
Modified
Modified
Summary
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 linked upstream advisory.
Affected Software
Affected Software
unbound on Debian Linux
Detection Method
Detection Method
This check tests the installed software version using the apt package manager.
Solution
Solution
For Debian 8 'Jessie', this problem has been fixed in version 1.4.22-3+deb8u4. We recommend that you upgrade your unbound packages.