Description
Unbound before 1.9.5 allows configuration injection in create_unbound_ad_servers.sh upon a successful man-in-the-middle attack against a cleartext HTTP session. NOTE: The vendor does not consider this a vulnerability of the Unbound software. create_unbound_ad_servers.sh is a contributed script from the community that facilitates automatic configuration creation. It is not part of the Unbound installation
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | unbound | 1.9.6-1 | — |
| Debian 13 | unbound | 1.9.6-1 | — |
| Debian 12 | unbound | 1.9.6-1 | — |
| Debian 9 | unbound1.9 | 1.9.0-2+deb10u2~deb9u2 | DLA-2652-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | unbound | 1.9.4-2ubuntu1.2 | USN-4938-1 |
| Ubuntu 18.04 LTS | unbound | 1.6.7-1ubuntu2.4 | USN-4938-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP3 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLES 15 SP2 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLES 15 SP1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLES 15 | unbound | 1.6.8-3.9.1 | SUSE-SU-2022:0301-1 |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP2 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLES for SAP 15 SP1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLES for SAP 15 | unbound | 1.6.8-3.9.1 | SUSE-SU-2022:0301-1 |
| SLE Real Time 15 SP2 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-2 |
| SLE HPC 15 SP2 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLE HPC 15 SP1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SLE HPC 15 | unbound | 1.6.8-3.9.1 | SUSE-SU-2022:0301-1 |
| SUSE Manager Server 4.1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SUSE Manager Retail Branch Server 4.1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SUSE Manager Proxy 4.1 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SUSE Enterprise Storage 7 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
| SUSE Enterprise Storage 6 | unbound | 1.6.8-10.6.1 | SUSE-SU-2022:0176-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.3 | unbound | 1.6.8-10.6.1 | openSUSE-SU-2022:0176-1 |
Advisories 6
- USN-4938-1 unbound vulnerabilities Ubuntu Security Notices (USN) · Apr 27, 2026
- DLA-2652-1 unbound1.9 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2022:0301-1 Security update for unbound SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0176-1 Security update for unbound SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2022:0176-2 Security update for unbound SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2022:0176-1 Security update for unbound SUSE / openSUSE Security Updates · May 7, 2025