CVE-1999-0184 in BIND
Summary
by MITRE
When compiled with the -DALLOW_UPDATES option, bind allows dynamic updates to the DNS server, allowing for malicious modification of DNS records.
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Analysis
by VulDB Data Team • 04/16/2026
The vulnerability described in CVE-1999-0184 represents a critical security flaw in the Berkeley Internet Name Domain software commonly known as BIND. This issue specifically manifests when the DNS server is compiled with the -DALLOW_UPDATES option, which enables dynamic update functionality. The vulnerability stems from the improper implementation of access controls for DNS record modifications, creating a pathway for unauthorized entities to manipulate the authoritative DNS data stored within the server. This flaw directly violates fundamental security principles of access control and data integrity within network infrastructure services.
The technical implementation of this vulnerability resides in the DNS server's handling of dynamic update requests when the ALLOW_UPDATES compilation flag is enabled. When this option is active, the BIND server accepts and processes DNS update packets that can modify existing records or create new ones within the zone data. The vulnerability occurs because the server fails to properly authenticate or authorize these update requests, allowing any entity capable of sending update packets to the server to modify DNS records without proper authorization. This represents a classic case of insufficient access control mechanisms, which aligns with CWE-284 Access Control vulnerabilities and specifically relates to CWE-310 Cryptographic Issues when considering the lack of proper authentication mechanisms for DNS updates.
The operational impact of CVE-1999-0184 is severe and far-reaching within network security infrastructure. An attacker exploiting this vulnerability can perform DNS cache poisoning attacks, redirect users to malicious websites, or completely disrupt network services by modifying critical DNS records such as SOA, NS, or A records. This vulnerability enables man-in-the-middle attacks and can be leveraged for broader network infiltration as DNS is fundamental to internet operations. The impact extends beyond simple record modification to potentially compromise entire network domains and can be used in conjunction with other attack vectors to create persistent backdoors within network infrastructure. This vulnerability directly maps to ATT&CK technique T1071.004 Application Layer Protocol DNS for its exploitation of DNS protocols and T1566 Credential Access through the potential compromise of network authentication mechanisms.
Mitigation strategies for CVE-1999-0184 require immediate action to address the root cause of the vulnerability. The primary recommendation involves removing or disabling the -DALLOW_UPDATES compilation option when building BIND software, ensuring that dynamic update functionality is not enabled unless absolutely necessary and properly secured. Organizations should implement strict access controls and authentication mechanisms for any DNS servers that require dynamic update capabilities, including implementing TSIG (Transaction Signature) authentication for update requests. Network segmentation and firewall rules should be implemented to restrict access to DNS update ports, typically UDP port 53 and TCP port 53, ensuring only authorized systems can send update requests. Additionally, regular monitoring of DNS update activities and implementing intrusion detection systems specifically designed to identify anomalous DNS update patterns can provide early warning of potential exploitation attempts. The vulnerability also highlights the importance of following secure coding practices and conducting thorough security reviews of network infrastructure software before deployment.