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 python3-unboundUpgrade unboundUpgrade unbound-develUpgrade unbound-libs | Nov 14, 2022 | Aug 1, 2022 |
| Alpine Linux | — | Upgrade unbound | Mar 26, 2024 | Aug 1, 2022 |
| Amazon Linux Ami 2 | — | Upgrade unbound-develUpgrade python3-unboundUpgrade python2-unboundUpgrade unboundUpgrade unbound-libsUpgrade unbound-debuginfo | Feb 21, 2024 | Aug 1, 2022 |
| Amazon_linux_2023 | — | Upgrade unbound-develUpgrade unbound-anchorUpgrade unbound-libsUpgrade python3-unboundUpgrade unboundUpgrade unbound-libs-debuginfoUpgrade unbound-debuginfoUpgrade unbound-debugsourceUpgrade unbound-utils-debuginfoUpgrade unbound-anchor-debuginfoUpgrade python3-unbound-debuginfoUpgrade unbound-utils | Feb 17, 2025 | Aug 1, 2022 |
| Centos_linux | — | Upgrade python3-unbound-debuginfoUpgrade unbound-debuginfoUpgrade unbound-develUpgrade unbound-libs-debuginfoUpgrade python3-unboundUpgrade unbound-debugsourceUpgrade unboundUpgrade unbound-libs | 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 python3-unboundUpgrade unbound-libsUpgrade unbound | Nov 3, 2022 | Aug 1, 2022 |
| Huawei Euleros 2_0_sp8 | — | Upgrade python2-unboundUpgrade unboundUpgrade python3-unboundUpgrade unbound-libs | 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 unbound-develUpgrade python3-unbound | Nov 16, 2022 | Aug 1, 2022 |
| Redhat_linux | — | Upgrade unbound-debuginfoUpgrade unbound-debugsourceUpgrade python3-unbound-debuginfoNo solution existsUpgrade unbound-develUpgrade unbound-libs-debuginfoUpgrade unbound-libsUpgrade python3-unboundUpgrade unbound | Nov 9, 2022 | Aug 1, 2022 |
| Rocky_linux | — | Upgrade unbound-debuginfoUpgrade unbound-develUpgrade python3-unbound-debuginfoUpgrade python3-unboundUpgrade unbound-libs-debuginfoUpgrade unboundUpgrade unbound-libsUpgrade unbound-debugsource | Mar 12, 2024 | Aug 1, 2022 |
| Suse | — | Upgrade unbound-anchorUpgrade unboundUpgrade unbound-pythonUpgrade unbound-develUpgrade unbound-muninUpgrade libunbound8 | Aug 9, 2024 | Aug 1, 2022 |
| Ubuntu | — | Upgrade libunbound2Upgrade unboundUpgrade libunbound8 | 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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