Description
Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query. The source IP address of the query must match an access-control rule.
References (7)
Core 7
Core References
Product, Release Notes x_refsource_misc
https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog
Patch, Vendor Advisory x_refsource_misc
https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
Third Party Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4149-1/
Third Party Advisory vendor-advisory
x_refsource_debian
https://www.debian.org/security/2019/dsa-4544
Mailing List mailing-list
x_refsource_bugtraq
https://seclists.org/bugtraq/2019/Oct/23
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/
Mailing List, Third Party Advisory vendor-advisory
x_refsource_fedora
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/
Scores
CVSS v3
7.5
EPSS
0.0125
EPSS Percentile
79.4%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-755
CWE-908
Status
published
Products (2)
canonical/ubuntu_linux
19.04
nlnetlabs/unbound
< 1.9.4
Published
Oct 03, 2019
Tracked Since
Feb 18, 2026