NLnet Labs Unbound, up to and including version 1.16.1, is vulnerable to a novel type of the "ghost domain names" attack. The vulnerability works by targeting an Unbound instance. Unbound is queried for a rogue domain name when the cached delegation information is about to expire. The rogue nameserver delays the response so that the cached delegation information is expired. Upon receiving the delayed answer containing the delegation information, Unbound overwrites the now expired entries. This action can be repeated when the delegation information is about to expire making the rogue delegation information ever-updating. From version 1.16.2 on, Unbound stores the start time for a query and uses that to decide if the cached delegation information can be overwritten.
CVSS Details
- CVSS 3.1 Base Score: 6.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade unbound-develUpgrade unbound-libsUpgrade unboundUpgrade python3-unbound | Nov 14, 2022 | Aug 1, 2022 |
| Alpine Linux | — | Upgrade unbound | Mar 26, 2024 | Aug 1, 2022 |
| Amazon Linux Ami 2 | — | Upgrade python3-unboundUpgrade unbound-libsUpgrade unbound-develUpgrade unboundUpgrade python2-unboundUpgrade unbound-debuginfo | Feb 21, 2024 | Aug 1, 2022 |
| Amazon_linux_2023 | — | Upgrade unbound-anchorUpgrade python3-unboundUpgrade unbound-develUpgrade unboundUpgrade unbound-libsUpgrade python3-unbound-debuginfoUpgrade unbound-libs-debuginfoUpgrade unbound-debuginfoUpgrade unbound-utilsUpgrade unbound-utils-debuginfoUpgrade unbound-debugsourceUpgrade unbound-anchor-debuginfo | Feb 17, 2025 | Aug 1, 2022 |
| Centos_linux | — | Upgrade unbound-debuginfoUpgrade unbound-develUpgrade python3-unbound-debuginfoUpgrade unbound-libs-debuginfoUpgrade unbound-libsUpgrade unboundUpgrade unbound-debugsourceUpgrade python3-unbound | Nov 9, 2022 | Aug 1, 2022 |
| Debian | — | Upgrade unbound | Mar 31, 2023 | Aug 1, 2022 |
| Freebsd | — | Upgrade unbound | Nov 4, 2022 | Aug 5, 2022 |
| Gentoo Linux | — | Upgrade net-dns/unbound. | Dec 19, 2022 | Aug 1, 2022 |
| Huawei Euleros 2_0_sp10 | — | Upgrade unboundUpgrade unbound-libsUpgrade python3-unbound | Nov 3, 2022 | Aug 1, 2022 |
| Huawei Euleros 2_0_sp8 | — | Upgrade unbound-libsUpgrade python3-unboundUpgrade unboundUpgrade python2-unbound | Oct 11, 2022 | Aug 1, 2022 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-unboundUpgrade unboundUpgrade unbound-libs | Nov 15, 2022 | Aug 1, 2022 |
| Oracle_linux | — | Upgrade unbound-libsUpgrade unboundUpgrade python3-unboundUpgrade unbound-devel | Nov 16, 2022 | Aug 1, 2022 |
| Redhat_linux | — | Upgrade unbound-libsUpgrade python3-unboundUpgrade unbound-libs-debuginfoUpgrade unboundUpgrade unbound-develUpgrade unbound-debugsourceNo solution existsUpgrade python3-unbound-debuginfoUpgrade unbound-debuginfo | Nov 9, 2022 | Aug 1, 2022 |
| Rocky_linux | — | Upgrade unbound-libsUpgrade unboundUpgrade unbound-debugsourceUpgrade python3-unbound-debuginfoUpgrade unbound-libs-debuginfoUpgrade unbound-debuginfoUpgrade python3-unboundUpgrade unbound-devel | Mar 12, 2024 | Aug 1, 2022 |
| Suse | — | Upgrade unbound-develUpgrade unboundUpgrade unbound-pythonUpgrade unbound-anchorUpgrade libunbound8Upgrade unbound-munin | Aug 9, 2024 | Aug 1, 2022 |
| Ubuntu | — | Upgrade libunbound8Upgrade unboundUpgrade libunbound2 | Aug 17, 2022 | Aug 1, 2022 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Aug 1, 2022 |
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