Unbound DNS Assertion Failure in Versions Prior to 1.9.5 by Netgate
CVE-2019-25041

7.5HIGH

Key Information:

Vendor

Nlnetlabs

Status
Unbound
Vendor
CVE Published:
27 April 2021

What is CVE-2019-25041?

Unbound versions prior to 1.9.5 are susceptible to an assertion failure due to a compressed name in the dname_pkt_copy function. This vulnerability raises concerns about the stability of the DNS service. However, the vendor asserts that a running Unbound installation cannot be remotely or locally exploited, which may mitigate immediate risks. Security updates are recommended to ensure optimal protection and stability.

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

.