CWE-1229: Creation of Emergent Resource

Extended Description

A product is only expected to behave in a way that was specifically intended by the developer. Resource allocation and management is expected to be performed explicitly by the associated code. However, in systems with complex behavior, the product might indirectly produce new kinds of resources that were never intended in the original design. For example, a covert channel is a resource that was never explicitly intended by the developer, but it is useful to attackers. "Parasitic computing," while not necessarily malicious in nature, effectively tricks a product into performing unintended computations on behalf of another party.

Code Examples & CVEs

Demonstrative Examples

In this example, the attacker observes how long an authentication takes when the user types in the correct password.

When the attacker tries their own values, they can first try strings of various length. When they find a string of the right length, the computation will take a bit longer, because the for loop will run at least once. Additionally, with this code, the attacker can possibly learn one character of the password at a time, because when they guess the first character right, the computation will take longer than a wrong guesses. Such an attack can break even the most sophisticated password with a few hundred guesses.

BadPython

def validate_password(actual_pw, typed_pw): 		                     if len(actual_pw) <> len(typed_pw): 		   return 0                    for i in len(actual_pw): 		   if actual_pw[i] <> typed_pw[i]: 		   return 0                                        return 1

Source-backed guidance

Additional facts reviewed against primary or authoritative security sources.

Detect imprecise mappings involving CWE-1229

Review mappings to CWE-1229, Creation of Emergent Resource, with MITRE's mapping and navigation criteria. Flag any selection that points to a View or Category, remains at a higher abstraction than the available evidence supports, or ignores relevant parent, child, peer, and alternative entries. Treat those findings as mapping-quality defects, correct them before publication, and retain the comparison trail for repeatable audits.

CWE Mapping and Navigation Guidance — MITRE CWE

Prevent CWE-1229 through an SSDF control plan

Use NIST SSDF practices to make prevention of CWE-1229, Creation of Emergent Resource, 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-1229 against known exploitation evidence

Use CISA's Known Exploited Vulnerabilities catalog to test whether a vulnerability mapped to CWE-1229, Creation of Emergent Resource, 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

Use MITRE taxonomy anchors to review Creation of Emergent Resource

Recorded impacts include Varies by Context; related weaknesses include CWE-664. Use these source-defined anchors to turn CWE-1229 into implementation, review, and verification checks for the affected component.

CWE-1229: Creation of Emergent Resource — MITRE CWE

Validate CWE-1229 with root-cause mapping checks

Apply MITRE's root-cause mapping quick tips to CWE-1229, Creation of Emergent Resource. 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-1229: Creation of Emergent Resource?+

CWE-1229: Creation of Emergent Resource is a Common Weakness Enumeration (CWE) entry maintained by MITRE. The product manages resources or behaves in a way that indirectly creates a new, distinct resource that can be used by attackers in violation of the intended policy. A product is only expected to behave in a way that was specifically intended by the developer. Resource allocation and management is expected to be performed explicitly by the associated code. However, in systems with complex behavior, the product might indirectly produce new kinds of resources that were never intended in the original design. For example, a covert channel is a resource that was never explicitly intended by the developer, but it is useful to attackers. "Parasitic computing," while not necessarily malicious in nature, effectively tricks a product into performing unintended computations on behalf of another party.

What are the security consequences of Creation of Emergent Resource?+

If exploited, CWE-1229 (Creation of Emergent Resource) it can compromise Other, leading to outcomes such as Varies by Context.

Which programming languages are affected by Creation of Emergent Resource?+

CWE-1229 commonly affects Not Language-Specific. Note that weaknesses are often language-agnostic patterns, so secure coding practices apply broadly.

What is the difference between a CWE and a CVE?+

A CWE (Common Weakness Enumeration) like CWE-1229 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-1229: Creation of Emergent Resource

Extended Description

Technical Details

Applicable To

Security Consequences

Scope

Impact

Mitigation Strategies

Detection Methods