VulnerabilityModified
CVE-2019-16866
Unbound before 1.9.4 accesses uninitialized memory, which allows remote attackers to trigger a crash via a crafted NOTIFY query.
HIGH 7.5EPSS 3.51%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (3.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 3.51% probability · 89th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-755, CWE-908
- Affected
- nlnetlabs/unbound · canonical/ubuntu linux
- Source
- cve@mitre.org
References
- https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/ChangelogProduct, Release Notes
- 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://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txtPatch, Vendor Advisory
- https://seclists.org/bugtraq/2019/Oct/23
- https://usn.ubuntu.com/4149-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4544
- https://github.com/NLnetLabs/unbound/blob/release-1.9.4/doc/ChangelogProduct, Release Notes
- 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://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txtPatch, Vendor Advisory
- https://seclists.org/bugtraq/2019/Oct/23
- https://usn.ubuntu.com/4149-1/Third Party Advisory
- https://www.debian.org/security/2019/dsa-4544
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.