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Home - Vulnerability NotesPrint
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CERT-In Vulnerability Note CIVN-2025-0280
Multiple Vulnerabilities in ISC Bind

Original Issue Date:October 24, 2025

Severity Rating: HIGH

Software Affected

  • BIND versions:
    • 9.18.0 - 9.18.39
    • 9.20.0 - 9.20.13
    • 9.21.0 - 9.21.12
    • 9.16.0 - 9.16.50
  • BIND Supported Preview Edition versions: 
    • 9.18.11-S1 - 9.18.39-S1
    • 9.20.9-S1 - 9.20.13-S1
    • 9.16.8-S1 - 9.16.50-S1

Overview

Multiple vulnerabilities have been reported in ISC BIND, which could allow an perform DNS cache poisoning or cause denial-of-service (DoS) conditions on the targeted system.

Target Audience:
All individuals and organizations using affected ISC BIND versions.

Risk Assessment:
High risk of service disruption, DNS cache poisoning, and traffic redirection.

Impact Assessment:
Potential for DNS response manipulation, loss of DNS service availability.

Description

ISC BIND is an open-source DNS server software package that provides both authoritative and recursive DNS services.

These vulnerabilities exist in ISC BIND due to malformed DNSKEY records that can cause CPU exhaustion, a pseudo-random number generator (PRNG) weakness that allows prediction of source ports and query IDs, and lenient acceptance of records, enabling injection of forged data into the cache.

Successful exploitation of these vulnerabilities could allow an attacker to manipulate DNS responses (cache poisoning) or cause denial of service condition due to CPU exhaustion on the targeted system.

Solution

Apply the necessary patches and updates as provided by ISC:
https://kb.isc.org/docs/cve-2025-8677

https://kb.isc.org/docs/cve-2025-40780

https://kb.isc.org/docs/cve-2025-40778

Vendor Information

ISC BIND
https://kb.isc.org/docs/cve-2025-8677
https://kb.isc.org/docs/cve-2025-40780
https://kb.isc.org/docs/cve-2025-40778

References

ISC BIND
https://kb.isc.org/docs/cve-2025-8677
https://kb.isc.org/docs/cve-2025-40780
https://kb.isc.org/docs/cve-2025-40778

CVE Name
CVE-2025-8677
CVE-2025-40780
CVE-2025-40778

Disclaimer

The information provided herein is on "as is" basis, without warranty of any kind.

Contact Information

Email: info@cert-in.org.in
Phone: +91-11-22902657

Postal address

Indian Computer Emergency Response Team (CERT-In)
Ministry of Electronics and Information Technology
Government of India
Electronics Niketan
6, CGO Complex, Lodhi Road,
New Delhi - 110 003
India

 
Indian Computer Emergency Response Team - CERT-In, Ministry of Electronics and Information Technology, Government of India.
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