SecuriTricks - CVE-2025-8677

Description

Querying for records within a specially crafted zone containing certain malformed DNSKEY records can lead to CPU exhaustion. This issue affects BIND 9 versions 9.18.0 through 9.18.39, 9.20.0 through 9.20.13, 9.21.0 through 9.21.12, 9.18.11-S1 through 9.18.39-S1, and 9.20.9-S1 through 9.20.13-S1.

Product(s) Impacted

Vendor	Product	Versions
Isc	Bind	9.18.0-9.18.39, 9.20.0-9.20.13, 9.21.0-9.21.12, 9.18.11-s1-9.18.39-s1, 9.20.9-s1-9.20.13-s1

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-405

Asymmetric Resource Consumption (Amplification)

The product does not properly control situations in which an adversary can cause the product to consume or produce excessive resources without requiring the adversary to invest equivalent work or otherwise prove authorization, i.e., the adversary's influence is "asymmetric."

*CPE(s)

Affected systems and software identified for this CVE.

Type	Vendor	Product	Version	Update	Edition	Language	Software Edition	Target Software	Target Hardware	Other Information
a	isc	bind	9.18.0-9.18.39	/	/	/	/	/	/	/
a	isc	bind	9.20.0-9.20.13	/	/	/	/	/	/	/
a	isc	bind	9.21.0-9.21.12	/	/	/	/	/	/	/
a	isc	bind	9.18.11-s1-9.18.39-s1	/	/	/	/	/	/	/
a	isc	bind	9.20.9-s1-9.20.13-s1	/	/	/	/	/	/	/

References

https://kb.isc.org/docs/cve-2025-8677

CVSS Score

7.5 / 10

CVSS Data - 3.1

Attack Vector: NETWORK
Attack Complexity: LOW
Privileges Required: NONE
Scope: UNCHANGED
Confidentiality Impact: NONE
Integrity Impact: NONE
Availability Impact: HIGH

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

View Vector String

Timeline

Published: Oct. 22, 2025, 4:15 p.m.
Last Modified: Oct. 22, 2025, 9:12 p.m.

Status : Awaiting Analysis

CVE has been recently published to the CVE List and has been received by the NVD.

More info

Source

security-officer@isc.org

CVE-2025-8677