CVE-2019-16866
HIGH severity · CVSS 7.5 · CWE-755
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)4%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Official patch: https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt ↗
Additional information
- NVD record
- https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txtPatch
- https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/Changelog
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/E65NCWZZB2D75ZIYWPXKMVGSGNYW4JMC/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/MLRHE7TQFAOV4MB2ELTOGESZYUL65NUJ/
- https://seclists.org/bugtraq/2019/Oct/23
- https://usn.ubuntu.com/4149-1/Advisory
- https://www.debian.org/security/2019/dsa-4544