CVE-2019-25031 — Unbound before 1
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 cont
Published
2021-04-27T06:15:07.447
Last modified
2026-08-25T10:55:42.710
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
01What is this vulnerability?
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…
02Affected products
No structured affected-product list available — see references below for vendor advisories.
03Active exploitation status
Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.
04Recommended remediation
- Patch to a fixed version listed in the vendor advisory (see references below).
- Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
- Hunt historical logs for exploitation indicators — see Detection signatures below.
05Technical details
For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.
06Detection signatures
Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.
07Related CVEs
No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.
08Timeline
- Published: 2021-04-27T06:15:07.447
- Last modified: 2026-08-25T10:55:42.710
09References
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
- ostif.org — https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
- security.netapp.com — https://security.netapp.com/advisory/ntap-20210507-0007/
- lists.debian.org — https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
- ostif.org — https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
- security.netapp.com — https://security.netapp.com/advisory/ntap-20210507-0007/
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