Misleading Information

Description

Misleading Information (MI) is a broad category of security attacks defined in 3GPP, where an adversary (often referred to as an attacker or malicious user) intentionally provides, alters, or generates false data that is processed by network elements or User Equipment (UE). The core objective is to mislead the system into making incorrect decisions, degrading performance, or causing a denial of service. MI attacks can target various network functions, but they are particularly emphasized in the context of positioning, navigation, and timing services.

In a positioning context, such as with LTE Positioning Protocol (LPP) or NR Positioning Protocol (NRPPa), MI often manifests as location spoofing or manipulation. An attacker might broadcast forged or replayed positioning reference signals (e.g., for OTDOA - Observed Time Difference of Arrival) or provide falsified assistance data to a UE. The UE, using this misleading information, would compute an incorrect geographic position. Similarly, an attacker could provide misleading information to the network's Location Management Function (LMF) about a UE's measurements, causing the network to derive a wrong location. The technical specifications, such as TS 38.857 (study on NR positioning), analyze these threats in detail.

The mechanisms for generating MI vary. It can involve signal-level attacks, such as generating radio signals that mimic legitimate base stations (false gNBs/eNBs) with manipulated timing or content. It can also involve protocol-level attacks, where legitimate signaling messages are intercepted and modified (man-in-the-middle) or completely fabricated before being injected into the communication stream. The network and UE must employ countermeasures to detect and mitigate MI. These include cryptographic authentication of signaling messages (e.g., using integrity protection), validation of data consistency, using multiple independent positioning methods (e.g., combining GNSS with terrestrial signals), and anomaly detection algorithms that identify improbable location jumps or signal characteristics.

Beyond positioning, MI is a general threat model applicable to other areas like network configuration (providing false system information blocks), mobility management (sending false handover commands), or management systems. The 3GPP security architecture, therefore, considers protection against MI as a fundamental requirement, mandating security measures like integrity protection, replay protection, and authorization checks to ensure the authenticity and reliability of critical information.

Purpose & Motivation

The formal recognition and study of Misleading Information within 3GPP standards is driven by the increasing reliance on wireless networks for safety-critical and high-precision services. Early cellular systems primarily focused on voice and basic data, where security threats were often about eavesdropping or service theft. As networks evolved to support precise location services (for emergency calls, logistics, automotive), navigation, and highly automated processes, the consequences of receiving false data became severe.

MI addresses a specific gap in threat models: attacks that do not necessarily seek to breach confidentiality or steal service, but to corrupt the system's perception of reality. For example, spoofing a vehicle's location in a V2X system could cause catastrophic accidents. Manipulating timing signals could disrupt financial transactions or power grid synchronization. The creation of false network configuration data could lead to widespread service outages. Traditional security measures like encryption alone are insufficient, as MI can involve validly encrypted but logically false content from a compromised or fake entity.

Therefore, 3GPP initiated studies (e.g., in TS 38.857) to systematically analyze MI threats, particularly for new technologies like 5G NR positioning. The purpose is to define the threat landscape, assess potential impacts, and standardize necessary security countermeasures within the protocol design itself. This proactive security-by-design approach ensures that features like positioning are built with resilience against deception, making the network trustworthy for applications where data authenticity is as crucial as availability and confidentiality.

Key Features

• A security threat model involving the provision of false data to network or UE
• Particularly critical for positioning, navigation, and timing (PNT) services
• Can manifest as location spoofing, signal replay, or data fabrication
• Targets the integrity and authenticity of information rather than just confidentiality
• Requires countermeasures like cryptographic integrity protection and multi-source validation
• Studied across multiple 3GPP releases to address evolving attack vectors

Evolution Across Releases

Defining Specifications