CVE-2019-16866 : Unbound before 1.9.4 accesses uninitialized memory, which allows remote attacker

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.

Published 2019-10-03 19:15:10

Updated 2020-08-24 17:37:01

Source MITRE

View at NVD, CVE.org

Products affected by CVE-2019-16866

Canonical » Ubuntu Linux » Version: 19.04
cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*
Matching versions
Nlnetlabs » Unbound
Versions before (<) 1.9.4
cpe:2.3:a:nlnetlabs:unbound:*:*:*:*:*:*:*:*
Matching versions

Threat overview for CVE-2019-16866

Top countries where our scanners detected CVE-2019-16866

Top open port discovered on systems with this issue 53

IPs affected by CVE-2019-16866 11,909

Threat actors abusing to this issue? Yes

Find out if you^* are affected by CVE-2019-16866!

^*Directly or indirectly through your vendors, service providers and 3rd parties. Powered by attack surface intelligence from SecurityScorecard.

Exploit prediction scoring system (EPSS) score for CVE-2019-16866

EPSS FAQ

3.06%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 91 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2019-16866

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
5.0	MEDIUM	AV:N/AC:L/Au:N/C:N/I:N/A:P	10.0	2.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: None Integrity Impact: None Availability Impact: Partial
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: None Integrity: None Availability: High

CWE ids for CVE-2019-16866

CWE-755 Improper Handling of Exceptional Conditions

The product does not handle or incorrectly handles an exceptional condition.

Assigned by: nvd@nist.gov (Primary)
CWE-908 Use of Uninitialized Resource

The product uses or accesses a resource that has not been initialized.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2019-16866

https://seclists.org/bugtraq/2019/Oct/23

Bugtraq: [SECURITY] [DSA 4544-1] unbound security update
https://usn.ubuntu.com/4149-1/

USN-4149-1: Unbound vulnerability | Ubuntu security notices
Third Party Advisory
https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog

unbound/Changelog at release-1.9.4 · NLnetLabs/unbound · GitHub
Product;Release Notes
https://www.debian.org/security/2019/dsa-4544

Debian -- Security Information -- DSA-4544-1 unbound
https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt

Patch;Vendor Advisory
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/

[SECURITY] Fedora 31 Update: unbound-1.9.4-1.fc31 - package-announce - Fedora Mailing-Lists
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/

[SECURITY] Fedora 30 Update: unbound-1.9.4-1.fc30 - package-announce - Fedora Mailing-Lists