CWE-1242

Inclusion of Undocumented Features or Chicken Bits

The device includes chicken bits or undocumented features that can create entry points for unauthorized actors.

CVE-2017-20204 (GCVE-0-2017-20204)
Vulnerability from cvelistv5
Published
2025-10-15 01:20
Modified
2025-10-15 19:56
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Summary
DBLTek GoIP devices (models GoIP 1, 4, 8, 16, and 32) contain an undocumented vendor backdoor in the Telnet administrative interface that allows remote authentication as an undocumented user via a proprietary challenge–response scheme which is fundamentally flawed. Because the challenge response can be computed from the challenge itself, a remote attacker can authenticate without knowledge of a secret and obtain a root shell on the device. This can lead to persistent remote code execution, full device compromise, and arbitrary control of the device and any managed services. The firmware used within these devices was updated in December 2016 to make this vulnerability more complex to exploit. However, it is unknown if DBLTek has taken steps to fully mitigate.
Impacted products
Show details on NVD website


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CVE-2025-12176 (GCVE-0-2025-12176)
Vulnerability from cvelistv5
Published
2025-10-24 15:56
Modified
2025-10-24 19:56
CWE
  • CWE-1242 - Inclusion of Undocumented Features or Chicken Bits
Summary
Undocumented administrative accounts were getting created to facilitate access for applications running on board.This issue affects BLU-IC2: through 1.19.5; BLU-IC4: through 1.19.5.
Impacted products
Show details on NVD website


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CVE-2025-52548 (GCVE-0-2025-52548)
Vulnerability from cvelistv5
Published
2025-09-02 11:26
Modified
2025-09-02 13:28
CWE
Summary
E3 Site Supervisor Control (firmware version < 2.31F01) contains a hidden API call in the application services that enables SSH and Shellinabox, which exist but are disabled by default. An attacker with admin access to the application services can utilize this API to enable remote access to the underlying OS.
Impacted products
Show details on NVD website


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CVE-2025-55050 (GCVE-0-2025-55050)
Vulnerability from cvelistv5
Published
2025-09-09 18:56
Modified
2025-09-10 14:29
Severity ?
CWE
Summary
CWE-1242: Inclusion of Undocumented Features
Impacted products
Vendor Product Version
Baicells NOVA430e/430i, NOVA436Q, NEUTRINO430, NOVA846 Version: BaiBLQ_3.0.12 and older versions. BaiBU_DNB4_2.4.9 and older versions
Create a notification for this product.
Show details on NVD website


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Mitigation

Phases: Architecture and Design, Implementation

Description:

  • The implementation of chicken bits in a released product is highly discouraged. If implemented at all, ensure that they are disabled in production devices. All interfaces to a device should be documented.
CAPEC-212: Functionality Misuse

An adversary leverages a legitimate capability of an application in such a way as to achieve a negative technical impact. The system functionality is not altered or modified but used in a way that was not intended. This is often accomplished through the overuse of a specific functionality or by leveraging functionality with design flaws that enables the adversary to gain access to unauthorized, sensitive data.

CAPEC-36: Using Unpublished Interfaces or Functionality

An adversary searches for and invokes interfaces or functionality that the target system designers did not intend to be publicly available. If interfaces fail to authenticate requests, the attacker may be able to invoke functionality they are not authorized for.

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