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.
Weakness
The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Unbound | Nlnetlabs | * | 1.6.8 (excluding) |
| Unbound | Ubuntu | artful | * |
| Unbound | Ubuntu | bionic | * |
| Unbound | Ubuntu | esm-infra-legacy/trusty | * |
| Unbound | Ubuntu | esm-infra/bionic | * |
| Unbound | Ubuntu | esm-infra/xenial | * |
| Unbound | Ubuntu | trusty | * |
| Unbound | Ubuntu | trusty/esm | * |
| Unbound | Ubuntu | upstream | * |
| Unbound | Ubuntu | xenial | * |
References
- http://www.securityfocus.com/bid/102817
- https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html
- https://unbound.net/downloads/CVE-2017-15105.txt
- https://usn.ubuntu.com/3673-1/
- http://www.securityfocus.com/bid/102817
- https://lists.debian.org/debian-lts-announce/2018/01/msg00039.html
- https://lists.debian.org/debian-lts-announce/2019/02/msg00022.html
- https://unbound.net/downloads/CVE-2017-15105.txt
- https://usn.ubuntu.com/3673-1/