Denial of Service in Unbound DNS Software by NLnet Labs
CVE-2019-25036

7.5HIGH

Key Information:

Vendor

Nlnetlabs

Status
Unbound
Vendor
CVE Published:
27 April 2021

What is CVE-2019-25036?

A vulnerability in the Unbound DNS software allows for an assertion failure in the synth_cname function, which could lead to service disruptions. While the vendor contests the severity of this issue, the potential for denial of service exists in certain conditions, impacting the stability and availability of DNS services.

References

https://ostif.org/our-audit-of-unbound-dns-by-x41-d-sec-f...
x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021/05/msg0...
mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-20210507-0007/
x_refsource_CONFIRM

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

.