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
References (3)
Core 3
Core References
Not Applicable, Third Party Advisory x_refsource_misc
https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-full-results/
Mailing List, Third Party Advisory mailing-list
x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2021/05/msg00007.html
Third Party Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20210507-0007/
Scores
CVSS v3
5.9
EPSS
0.0134
EPSS Percentile
67.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
Details
CWE
CWE-74
Status
published
Products (2)
debian/debian_linux
9.0
nlnetlabs/unbound
< 1.9.5
Published
Apr 27, 2021
Tracked Since
Feb 18, 2026