Unbound Vulnerability Allows Remote Attackers to Trigger Crashes
CVE-2019-16866

7.5HIGH

Key Information:

Vendor

Nlnetlabs

Status
Unbound
Vendor
CVE Published:
3 October 2019

What is CVE-2019-16866?

The Unbound DNS resolver, prior to version 1.9.4, contains a vulnerability that allows remote attackers to exploit uninitialized memory access. This can be triggered by sending a specially crafted NOTIFY query, provided that the source IP address aligns with the established access control rules. Such an action may lead to the application crashing, thereby potentially disrupting DNS service and affecting network integrity.

References

https://github.com/NLnetLabs/unbound/blob/release-1.9.4/d...
x_refsource_MISC
https://nlnetlabs.nl/downloads/unbound/CVE-2019-16866.txt
x_refsource_MISC
https://usn.ubuntu.com/4149-1/
vendor-advisoryx_refsource_UBUNTU

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.