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CVE-2019-16866

HIGHCVSS 7.5/10EPSS 3.51%

Last modified

CVE-2019-16866 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 3.51% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
3.51%

87.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
NlnetlabsUnbound< 1.9.4
CanonicalUbuntu Linux19.04

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2019-16866?
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.
How severe is CVE-2019-16866?
CVE-2019-16866 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.51% probability of exploitation in the next 30 days.
How do I fix CVE-2019-16866?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2019-16866?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST