High severity · published Oct 3, 2019
CVE-2019-16866
Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query
7.5
CVSS
3.5%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)3.5% · higher than 89% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
UL
Ubuntu Linux · Canonical
19.04 · source: NVD
UN
Unbound · Nlnetlabs
before 1.9.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2019-16866
CVE.org
https://www.cve.org/CVERecord?id=CVE-2019-16866
Product
https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/
lists.fedoraproject.org
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/
Patch
https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
seclists.org
https://seclists.org/bugtraq/2019/Oct/23
Third Party Advisory
https://usn.ubuntu.com/4149-1/
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