CWE-234: Failure to Handle Missing Parameter

VariantIncompleteExploit Likelihood: High

If too few arguments are sent to a function, the function will still pop the expected number of arguments from the stack. Potentially, a variable number of arguments could be exhausted in a function as well.

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Technical Details

Structure
Simple
Vulnerability Mapping
DISCOURAGED

Applicable To

Languages
Not Language-Specific
Platforms

Source-backed guidance

Additional facts reviewed against primary or authoritative security sources.

Verify controls for CWE-234 with SSDF evidence

Use NIST SSDF verification and vulnerability-response practices to detect CWE-234, Failure to Handle Missing Parameter, throughout the product lifecycle. Derive review questions, static or dynamic checks, and negative tests from the CWE's causal behavior; define the components and lifecycle stages each check covers; and retain findings with enough evidence to distinguish the root cause from symptoms and impacts. Track escapes and false negatives, then improve the verification plan after every confirmed occurrence.

NIST SP 800-218 Secure Software Development Framework — National Institute of Standards and Technology

Address Failure to Handle Missing Parameter during Build and Compilation

MITRE associates mitigation with Build and Compilation, and Implementation; recorded impacts include Execute Unauthorized Code or Commands, Gain Privileges or Assume Identity, and DoS: Crash, Exit, or Restart; observed examples include CVE-2004-0276, CVE-2002-1488, and CVE-2002-1169. Use these source-defined anchors to turn CWE-234 into implementation, review, and verification checks for the affected component.

CWE-234: Failure to Handle Missing Parameter — MITRE CWE

Triage CWE-234 against known exploitation evidence

Use CISA's Known Exploited Vulnerabilities catalog to test whether a vulnerability mapped to CWE-234, Failure to Handle Missing Parameter, has evidence of exploitation in the wild. Confirm the CVE-to-CWE root-cause mapping independently before attaching the example, then capture the affected product, required action, and remediation deadline. A missing KEV match is not evidence that the weakness is unexploited, and a KEV entry must not be generalized to every occurrence of this CWE.

Known Exploited Vulnerabilities Catalog — Cybersecurity and Infrastructure Security Agency

Apply precise root-cause mapping to CWE-234

Apply MITRE's full root-cause mapping guidance when using CWE-234, Failure to Handle Missing Parameter. Separate weakness language from attacker prerequisites and technical impact, check the entry's abstraction and vulnerability-mapping notes, and prefer the most specific Base or Variant supported by the evidence. Record the rejected alternatives and require an independent review before the mapping is used for remediation trends or program metrics.

CVE to CWE Root Cause Mapping Guidance — MITRE CWE

Validate CWE-234 with root-cause mapping checks

Apply MITRE's root-cause mapping quick tips to CWE-234, Failure to Handle Missing Parameter. Confirm the finding describes the causal weakness rather than an impact or attack pattern, compare the abstraction and mapping notes with plausible alternatives, and have a second reviewer challenge the selection. Preserve the evidence and reasoning so recurring defects can be measured against one consistent identifier.

CVE to CWE Root Cause Mapping Quick Tips — MITRE CWE

Frequently Asked Questions

What is CWE-234: Failure to Handle Missing Parameter?+

CWE-234: Failure to Handle Missing Parameter is a Common Weakness Enumeration (CWE) entry maintained by MITRE. If too few arguments are sent to a function, the function will still pop the expected number of arguments from the stack. Potentially, a variable number of arguments could be exhausted in a function as well.

What are the security consequences of Failure to Handle Missing Parameter?+

If exploited, CWE-234 (Failure to Handle Missing Parameter) it can compromise Integrity, Confidentiality, Availability and Access Control, leading to outcomes such as Execute Unauthorized Code or Commands, Gain Privileges or Assume Identity and DoS: Crash, Exit, or Restart.

How do you prevent or mitigate Failure to Handle Missing Parameter?+

Recommended mitigations for CWE-234 include: This issue can be simply combated with the use of proper build process. Forward declare all functions. This is the recommended solution. Properly forward declaration of all used functions will result in a compiler error if too few arguments are sent to a function.

Which programming languages are affected by Failure to Handle Missing Parameter?+

CWE-234 commonly affects Not Language-Specific. Note that weaknesses are often language-agnostic patterns, so secure coding practices apply broadly.

What are real-world examples of Failure to Handle Missing Parameter?+

MITRE documents real CVEs mapped to CWE-234, including CVE-2004-0276, CVE-2002-1488, CVE-2002-1169, CVE-2000-0521 and CVE-2001-0590. 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-234 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.

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