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Test ID:1.3.6.1.4.1.25623.1.0.143049
Category:Denial of Service
Title:Unbound DNS Resolver < 1.9.4 DoS Vulnerability
Summary:Unbound DNS Resolver is prone to a denial of service (DoS); vulnerability.
Description:Summary:
Unbound DNS Resolver is prone to a denial of service (DoS)
vulnerability.

Vulnerability Insight:
Unbound 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.

Affected Software/OS:
Unbound DNS Resolver versions 1.7.1 through 1.9.3.

Solution:
Update to version 1.9.4 or later.

CVSS Score:
5.0

CVSS Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:P

Cross-Ref: Common Vulnerability Exposure (CVE) ID: CVE-2019-16866
Bugtraq: 20191016 [SECURITY] [DSA 4544-1] unbound security update (Google Search)
https://seclists.org/bugtraq/2019/Oct/23
Debian Security Information: DSA-4544 (Google Search)
https://www.debian.org/security/2019/dsa-4544
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/
https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog
https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
https://usn.ubuntu.com/4149-1/
CopyrightCopyright (C) 2019 Greenbone AG

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