CWE-1327: Binding to an Unrestricted IP Address
The product assigns the address 0.0.0.0 for a database server, a cloud service/instance, or any computing resource that communicates remotely.
View on MITREExtended Description
When a server binds to the address 0.0.0.0, it allows connections from every IP address on the local machine, effectively exposing the server to every possible network. This might be much broader access than intended by the developer or administrator, who might only be expecting the server to be reachable from a single interface/network.
Technical Details
- Structure
- Simple
Applicable To
Security Consequences
Scope
Impact
Likelihood
HighMitigation Strategies
Phase
Description
Assign IP addresses that are not 0.0.0.0.
Effectiveness
HighPhase
Description
Unwanted connections to the configured server may be denied through a firewall or other packet filtering measures.
Strategy
FirewallEffectiveness
HighDetection Methods
No detection method information available for this CWE.
Code Examples & CVEs
Demonstrative Examples
The following code snippet uses 0.0.0.0 in a Puppet script.
The Puppet code snippet is used to provision a signing server that will use 0.0.0.0 to accept traffic. However, as 0.0.0.0 is unrestricted, malicious users may use this IP address to launch frequent requests and cause denial of service attacks.
The following code snippet uses 0.0.0.0 in a Puppet script.
The Puppet code snippet is used to provision a signing server that will use 0.0.0.0 to accept traffic. However, as 0.0.0.0 is unrestricted, malicious users may use this IP address to launch frequent requests and cause denial of service attacks.
Observed CVE Examples (1)
Desktop manager for Kubernetes and container management binds a service to 0.0.0.0, allowing users on the network to make requests to a dashboard API.
View DetailsCWE Relationships
No relationship information available for this CWE.
Frequently Asked Questions
What is CWE-1327: Binding to an Unrestricted IP Address?+
CWE-1327: Binding to an Unrestricted IP Address is a Common Weakness Enumeration (CWE) entry maintained by MITRE. The product assigns the address 0.0.0.0 for a database server, a cloud service/instance, or any computing resource that communicates remotely. When a server binds to the address 0.0.0.0, it allows connections from every IP address on the local machine, effectively exposing the server to every possible network. This might be much broader access than intended by the developer or administrator, who might only be expecting the server to be reachable from a single interface/network.
What are the security consequences of Binding to an Unrestricted IP Address?+
If exploited, CWE-1327 (Binding to an Unrestricted IP Address) it can compromise Availability, leading to outcomes such as DoS: Amplification.
How do you prevent or mitigate Binding to an Unrestricted IP Address?+
Recommended mitigations for CWE-1327 include: Assign IP addresses that are not 0.0.0.0. Unwanted connections to the configured server may be denied through a firewall or other packet filtering measures.
Which programming languages are affected by Binding to an Unrestricted IP Address?+
CWE-1327 commonly affects Other. Note that weaknesses are often language-agnostic patterns, so secure coding practices apply broadly.
What are real-world examples of Binding to an Unrestricted IP Address?+
MITRE documents real CVEs mapped to CWE-1327, including CVE-2022-21947. You can look up the full details of each CVE, including CVSS scores and remediation guidance, on our CVE Lookup tool.
What is the difference between a CWE and a CVE?+
A CWE (Common Weakness Enumeration) like CWE-1327 describes a category of software weakness — the underlying flaw type. A CVE (Common Vulnerabilities and Exposures) identifies a specific, real-world vulnerability in a particular product. In short, a CWE is the kind of mistake, and a CVE is an instance of that mistake being found in software.