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CVE-2020-12856 is a vulnerability in OpenTrace, as used in COVIDSafe (through v1.0.17), TraceTogether, ABTraceTogether, and other similar contact tracing applications on iOS and Android. The vulnerability arises from the way Bluetooth is used for proximity tracing, allowing remote attackers to perform long-term re-identification attacks. This undermines the intended privacy guarantees of the apps by enabling tracking of users over time.
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1 valid exploit after Mallory filtered fakes, detection scripts, and README-only repos.
This repository provides a proof-of-concept (PoC) exploit for CVE-2020-12856, a vulnerability in the Android version of the COVIDSafe contact tracing app (and similar apps) that allows an attacker to silently bond with a target device via Bluetooth. The exploit consists of Python scripts that set up a GATT server advertising a specific service UUID. When a vulnerable app connects and reads the characteristic, the device is bonded without user interaction, exposing permanent identifiers (Bluetooth address and IRK) that can be used for long-term tracking. The repository includes setup instructions (setup.sh), the main exploit script (exploit1.py), and supporting code for GATT advertisement and server functionality. The exploit targets Bluetooth Low Energy (BLE) and requires physical proximity to the target device. No network endpoints are involved; the attack is performed over Bluetooth. The code is well-structured and serves as a practical demonstration of the vulnerability.
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