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A flaw was found in the way unbound before 1.6.8 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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade unbound | Feb 19, 2019 | Jan 23, 2018 |
| Freebsd | — | Upgrade unbound | Jan 20, 2018 | Jan 19, 2018 |
| Huawei Euleros 2_0_sp2 | — | Upgrade unboundUpgrade unbound-libs | Dec 4, 2019 | Jan 23, 2018 |
| Huawei Euleros 2_0_sp3 | — | Upgrade unbound-libsUpgrade unbound | Dec 18, 2019 | Jan 23, 2018 |
| Huawei Euleros 2_0_sp5 | — | Upgrade unboundUpgrade unbound-libs | Nov 19, 2019 | Jan 23, 2018 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jan 23, 2018 |
| Suse | — | Upgrade libunbound2Upgrade unbound-develUpgrade unbound-anchor | May 20, 2018 | Oct 8, 2017 |
| Ubuntu | — | Upgrade unboundUpgrade libunbound2 | Jun 13, 2018 | Oct 8, 2017 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Jan 23, 2018 |
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