CWE-1419 Class Incomplete

Incorrect Initialization of Resource

This weakness occurs when a system fails to properly set up a resource during its creation, leaving it in an unstable, incorrect, or insecure state when used later.

Definition

What is CWE-1419?

This weakness occurs when a system fails to properly set up a resource during its creation, leaving it in an unstable, incorrect, or insecure state when used later.

In software, this often happens due to reliance on implicit or default initialization. For instance, in C, stack memory isn't automatically cleared, and many scripting languages assign a default null or zero value to uninitialized variables. This can lead to critical security flaws if the resource controls access, like an authentication flag, or holds sensitive configuration data. In hardware, similar issues arise from incorrect reset values, misconfigured security fuses, or physical defects. Even if fuses are programmed correctly, broken lines or interfering hardware can corrupt the value. This incorrect initialization during boot or reset can compromise the entire device's security posture from the start.

Real-world impact

Real-world CVEs caused by CWE-1419

CVE-2020-27211

Chain: microcontroller system-on-chip uses a register value stored in flash to set product protection state on the memory bus and does not contain protection against fault injection (CWE-1319) which leads to an incorrect initialization of the memory bus (CWE-1419) causing the product to be in an unprotected state.
CVE-2023-25815

chain: a change in an underlying package causes the gettext function to use implicit initialization with a hard-coded path (CWE-1419) under the user-writable C:\ drive, introducing an untrusted search path element (CWE-427) that enables spoofing of messages.
CVE-2022-43468

WordPress module sets internal variables based on external inputs, allowing false reporting of the number of views
CVE-2022-36349

insecure default variable initialization in BIOS firmware for a hardware board allows DoS
CVE-2015-7763

distributed filesystem only initializes part of the variable-length padding for a packet, allowing attackers to read sensitive information from previously-sent packets in the same memory location

How attackers exploit it

Step-by-step attacker path

1
Consider example design module system verilog code shown below. The register_example module is an example parameterized module that defines two parameters, REGISTER_WIDTH and REGISTER_DEFAULT. Register_example module defines a Secure_mode setting, which when set makes the register content read-only and not modifiable by software writes. register_top module instantiates two registers, Insecure_Device_ID_1 and Insecure_Device_ID_2. Generally, registers containing device identifier values are required to be read only to prevent any possibility of software modifying these values.
2
These example instantiations show how, in a hardware design, it would be possible to instantiate the register module with insecure defaults and parameters.
3
In the example design, both registers will be software writable since Secure_mode is defined as zero.
4
This code attempts to login a user using credentials from a POST request:
5
Because the $authorized variable is never initialized, PHP will automatically set $authorized to any value included in the POST request if register_globals is enabled. An attacker can send a POST request with an unexpected third value 'authorized' set to 'true' and gain authorized status without supplying valid credentials.

Vulnerable code example

Vulnerable Verilog

Consider example design module system verilog code shown below. The register_example module is an example parameterized module that defines two parameters, REGISTER_WIDTH and REGISTER_DEFAULT. Register_example module defines a Secure_mode setting, which when set makes the register content read-only and not modifiable by software writes. register_top module instantiates two registers, Insecure_Device_ID_1 and Insecure_Device_ID_2. Generally, registers containing device identifier values are required to be read only to prevent any possibility of software modifying these values.

Vulnerable Verilog

// Parameterized Register module example 
 // Secure_mode : REGISTER_DEFAULT[0] : When set to 1 register is read only and not writable// 
 module register_example 
 #( 
 parameter REGISTER_WIDTH = 8, // Parameter defines width of register, default 8 bits 
 parameter [REGISTER_WIDTH-1:0] REGISTER_DEFAULT = 2**REGISTER_WIDTH -2 // Default value of register computed from Width. Sets all bits to 1s except bit 0 (Secure _mode) 
 ) 
 ( 
 input [REGISTER_WIDTH-1:0] Data_in, 
 input Clk, 
 input resetn, 
 input write, 
 output reg [REGISTER_WIDTH-1:0] Data_out 
 ); 

 reg Secure_mode; 

 always @(posedge Clk or negedge resetn) 

```
   if (~resetn) 
   begin 
  	 Data_out <= REGISTER_DEFAULT; // Register content set to Default at reset 
  	 Secure_mode <= REGISTER_DEFAULT[0]; // Register Secure_mode set at reset 
   end 
   else if (write & ~Secure_mode) 
   begin 
  	 Data_out <= Data_in; 
   end 
 endmodule 
 module register_top 
 ( 
 input Clk, 
 input resetn, 
 input write, 
 input [31:0] Data_in, 
 output reg [31:0] Secure_reg, 
 output reg [31:0] Insecure_reg 
 ); 
 register_example #( 
   .REGISTER_WIDTH (32), 
   .REGISTER_DEFAULT (1224) // Incorrect Default value used bit 0 is 0. 
 ) Insecure_Device_ID_1 ( 
   .Data_in (Data_in), 
   .Data_out (Secure_reg), 
   .Clk (Clk), 
   .resetn (resetn), 
   .write (write) 
 ); 
 register_example #(
   .REGISTER_WIDTH (32) // Default not defined 2^32-2 value will be used as default. 
 ) Insecure_Device_ID_2 ( 
   .Data_in (Data_in), 
   .Data_out (Insecure_reg), 
   .Clk (Clk), 
   .resetn (resetn), 
   .write (write) 
 ); 
 endmodule

Secure code example

Secure Verilog

In the example design, both registers will be software writable since Secure_mode is defined as zero.

Secure Verilog

register_example #( 

```
   .REGISTER_WIDTH (32), 
   .REGISTER_DEFAULT (1225) // Correct default value set, to enable Secure_mode 
 ) Secure_Device_ID_example ( 
   .Data_in (Data_in), 
   .Data_out (Secure_reg), 
   .Clk (Clk), 
   .resetn (resetn), 
   .write (write) 
 );

What changed: the unsafe sink is replaced (or the input is validated/escaped) so the same payload no longer triggers the weakness.

Prevention checklist

How to prevent CWE-1419

Implementation Choose the safest-possible initialization for security-related resources.
Implementation Ensure that each resource (whether variable, memory buffer, register, etc.) is fully initialized.
Implementation Pay close attention to complex conditionals or reset sources that affect initialization, since some paths might not perform the initialization.
Architecture and Design Ensure that the design and architecture clearly identify what the initialization should be, and that the initialization does not have security implications.

Detection signals

How to detect CWE-1419

SAST High

Run static analysis (SAST) on the codebase looking for the unsafe pattern in the data flow.

DAST Moderate

Run dynamic application security testing against the live endpoint.

Runtime Moderate

Watch runtime logs for unusual exception traces, malformed input, or authorization bypass attempts.

Code review Moderate

Code review: flag any new code that handles input from this surface without using the validated framework helpers.

Plexicus auto-fix

Plexicus auto-detects CWE-1419 and opens a fix PR in under 60 seconds.

Codex Remedium scans every commit, identifies this exact weakness, and ships a reviewer-ready pull request with the patch. No tickets. No hand-offs.

Get a demo Try Plexicus free

Frequently asked questions

What is CWE-1419?

This weakness occurs when a system fails to properly set up a resource during its creation, leaving it in an unstable, incorrect, or insecure state when used later.

How serious is CWE-1419?

MITRE has not published a likelihood-of-exploit rating for this weakness. Treat it as medium-impact until your threat model proves otherwise.

What languages or platforms are affected by CWE-1419?

MITRE lists the following affected platforms: Not OS-Specific, Not Architecture-Specific, Not Technology-Specific.

How can I prevent CWE-1419?

Choose the safest-possible initialization for security-related resources. Ensure that each resource (whether variable, memory buffer, register, etc.) is fully initialized.

How does Plexicus detect and fix CWE-1419?

Plexicus's SAST engine matches the data-flow signature for CWE-1419 on every commit. When a match is found, our Codex Remedium agent opens a fix PR with the corrected code, tests, and a one-line summary for the reviewer.

Where can I learn more about CWE-1419?

MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1419.html. You can also reference OWASP and NIST documentation for adjacent guidance.

Related weaknesses

Weaknesses related to CWE-1419

CWE-665 Parent

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Incorrect Initialization of Resource

What is CWE-1419?

Real-world CVEs caused by CWE-1419

Step-by-step attacker path

Vulnerable Verilog

Secure Verilog

How to prevent CWE-1419

How to detect CWE-1419

Plexicus auto-detects CWE-1419 and opens a fix PR in under 60 seconds.

Frequently asked questions

Weaknesses related to CWE-1419

Improper Initialization

Initialization of a Resource with an Insecure Default

Cryptographic Operations are run Before Supporting Units are Ready

Insecure Setting of Generative AI/ML Model Inference Parameters

Non-exit on Failed Initialization

Missing Initialization of a Variable

Use of Uninitialized Variable

Allocation of Resources Without Limits or Throttling

Use of Uninitialized Resource

Further reading

Don't Let Security
Weigh You Down.

Incorrect Initialization of Resource

What is CWE-1419?

Real-world CVEs caused by CWE-1419

Step-by-step attacker path

Vulnerable Verilog

Secure Verilog

How to prevent CWE-1419

How to detect CWE-1419

Plexicus auto-detects CWE-1419 and opens a fix PR in under 60 seconds.

Frequently asked questions

Weaknesses related to CWE-1419

Improper Initialization

Initialization of a Resource with an Insecure Default

Cryptographic Operations are run Before Supporting Units are Ready

Insecure Setting of Generative AI/ML Model Inference Parameters

Non-exit on Failed Initialization

Missing Initialization of a Variable

Use of Uninitialized Variable

Allocation of Resources Without Limits or Throttling

Use of Uninitialized Resource

Further reading

Don't Let SecurityWeigh You Down.

Don't Let Security
Weigh You Down.