What are the security consequences of Improper Handling of Syntactically Invalid Structure?

If exploited, CWE-228 (Improper Handling of Syntactically Invalid Structure) it can compromise Integrity and Availability, leading to outcomes such as Unexpected State, DoS: Crash, Exit, or Restart and DoS: Resource Consumption (CPU).

Which programming languages are affected by Improper Handling of Syntactically Invalid Structure?

CWE-228 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 Improper Handling of Syntactically Invalid Structure?

MITRE documents real CVEs mapped to CWE-228, including CVE-2004-0270. 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-228 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.

CWE-228: Improper Handling of Syntactically Invalid Structure

Detect Improper Handling of Syntactically Invalid Structure with Automated Static Analysis

Documented detection approaches include Automated Static Analysis; recorded impacts include Unexpected State, DoS: Crash, Exit, or Restart, and DoS: Resource Consumption (CPU); observed examples include CVE-2004-0270. Use these source-defined anchors to turn CWE-228 into implementation, review, and verification checks for the affected component.

CWE-228: Improper Handling of Syntactically Invalid Structure — MITRE CWE

Prevent CWE-228 through an SSDF control plan

Use NIST SSDF practices to make prevention of CWE-228, Improper Handling of Syntactically Invalid Structure, an explicit development outcome. Translate the CWE definition into security requirements and design constraints, choose safer implementation patterns and toolchain checks, and define acceptance evidence before release. Feed every confirmed occurrence back into the requirements, design review, and coding rules so the same root cause is removed across the product rather than patched in one location.

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

Triage CWE-228 against known exploitation evidence

Use CISA's Known Exploited Vulnerabilities catalog to test whether a vulnerability mapped to CWE-228, Improper Handling of Syntactically Invalid Structure, 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-228

Apply MITRE's full root-cause mapping guidance when using CWE-228, Improper Handling of Syntactically Invalid Structure. 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-228 with root-cause mapping checks

Apply MITRE's root-cause mapping quick tips to CWE-228, Improper Handling of Syntactically Invalid Structure. 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

CWE-228: Improper Handling of Syntactically Invalid Structure

Technical Details

Applicable To

Security Consequences

Scope

Impact

Mitigation Strategies

Detection Methods

Code Examples & CVEs

Demonstrative Examples

Observed CVE Examples (1)

CWE Relationships

Parent Weaknesses

Source-backed guidance

Detect Improper Handling of Syntactically Invalid Structure with Automated Static Analysis

Prevent CWE-228 through an SSDF control plan

Triage CWE-228 against known exploitation evidence

Apply precise root-cause mapping to CWE-228

Validate CWE-228 with root-cause mapping checks

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