CVE-2019-25031
Low
No strong exploitation signal.
CVSS base
5.9
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
EPSS — probability of exploitation (30 days)
1.3%
70.0th percentile
CISA KEV
Not listed
Weakness / dates
CWE-74
Published 2021-04-27 · modified 2026-08-25
CVSS breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
| Attack Vector | N | Network |
| Attack Complexity | H | High |
| Privileges Required | N | None |
| User Interaction | N | None |
| Scope | U | Unchanged |
| Confidentiality | N | None |
| Integrity | H | High |
| Availability | N | None |
Timeline
- 2021-04-27 — Published (NVD)
- 2026-08-25 — Last modified (NVD)
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
Affected
References
- https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
- https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
- https://security.netapp.com/advisory/ntap-20210507-0007/
- https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
- https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
- https://security.netapp.com/advisory/ntap-20210507-0007/