CWE-1249 Base Incomplete

Application-Level Admin Tool with Inconsistent View of Underlying Operating System

Definition

What is CWE-1249?

This vulnerability occurs when an administrative tool (like a web interface or API) fails to accurately display the true state of the underlying operating system it manages. The tool's view becomes inconsistent with reality, hiding critical resources like user accounts, processes, or files from the administrator.

Administrative tools for cloud platforms, network devices, or IoT systems often manage OS-level resources like user accounts. A critical security gap emerges when this management layer loses synchronization with the actual OS state. For instance, if an attacker adds a user account directly to the OS, this 'ghost account' might remain invisible in the admin panel. This discrepancy allows malicious activity to go undetected, as administrators rely on an incomplete and misleading view of their system's security posture. Attackers exploit this weakness by creating persistent backdoor accounts, often by chaining it with other vulnerabilities like command injection or logic flaws. A rogue administrator could also hide accounts for later use. Since the management tool doesn't reflect these changes, standard administrative reviews won't uncover them, allowing threats to persist undetected. Ensuring the management application's data model is always synchronized with a single, authoritative source of truth in the OS is essential for maintaining visibility and control.

Real-world impact

Real-world CVEs caused by CWE-1249

No public CVE references are linked to this CWE in MITRE's catalog yet.

How attackers exploit it

Step-by-step attacker path

1
Suppose that an attacker successfully gains root privileges on a Linux system and adds a new 'user2' account:
2
This new user2 account would not be noticed on the web interface, if the interface does not refresh its data of available users.
3
It could be argued that for this specific example, an attacker with root privileges would be likely to compromise the admin tool or otherwise feed it with false data. However, this example shows how the discrepancy in critical data can help attackers to escape detection.

Vulnerable code example

Vulnerable Other

Suppose that an attacker successfully gains root privileges on a Linux system and adds a new 'user2' account:

Vulnerable Other

echo "user2:x:0:0::/root:/" >> /etc/passwd;
  echo "user2:\$6\$IdvyrM6VJnG8Su5U\$1gmW3Nm.IO4vxTQDQ1C8urm72JCadOHZQwqiH/nRtL8dPY80xS4Ovsv5bPCMWnXKKWwmsocSWXupUf17LB3oS.:17256:0:99999:7:::" >> /etc/shadow;

Attacker payload

Suppose that an attacker successfully gains root privileges on a Linux system and adds a new 'user2' account:

Attacker payload Other

echo "user2:x:0:0::/root:/" >> /etc/passwd;
  echo "user2:\$6\$IdvyrM6VJnG8Su5U\$1gmW3Nm.IO4vxTQDQ1C8urm72JCadOHZQwqiH/nRtL8dPY80xS4Ovsv5bPCMWnXKKWwmsocSWXupUf17LB3oS.:17256:0:99999:7:::" >> /etc/shadow;

Secure code example

Secure pseudo

// Validate, sanitize, or use a safe API before reaching the sink.
function handleRequest(input) {
  const safe = validateAndEscape(input);
  return executeWithGuards(safe);
}

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-1249

Architecture and Design Ensure that the admin tool refreshes its model of the underlying OS on a regular basis, and note any inconsistencies with configuration files or other data sources that are expected to have the same data.

Detection signals

How to detect CWE-1249

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-1249 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.

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Frequently asked questions

What is CWE-1249?

How serious is CWE-1249?

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-1249?

MITRE lists the following affected platforms: Not OS-Specific, Web Based.

How can I prevent CWE-1249?

Ensure that the admin tool refreshes its model of the underlying OS on a regular basis, and note any inconsistencies with configuration files or other data sources that are expected to have the same data.

How does Plexicus detect and fix CWE-1249?

Plexicus's SAST engine matches the data-flow signature for CWE-1249 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-1249?

MITRE publishes the canonical definition at https://cwe.mitre.org/data/definitions/1249.html. You can also reference OWASP and NIST documentation for adjacent guidance.

Related weaknesses

Weaknesses related to CWE-1249

CWE-1250 Parent

Improper Preservation of Consistency Between Independent Representations of Shared State

This vulnerability occurs when a system with multiple independent components (like distributed services or separate hardware units) each…

CWE-1251 Sibling

Mirrored Regions with Different Values

This vulnerability occurs when a system maintains duplicate copies of data or resources (like cached memory or shadow registers) but fails…

Resources

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