EC-Council Certified Ethical Hacker (CEH) v12Mobile Platform, IoT, and OT HackingMedium
A mobile application developer is integrating a third-party advertising SDK into their new Android application. During a security review, it's discovered that the SDK requests the `READ_CALL_LOG` and `PROCESS_OUTGOING_CALLS` permissions, which are not explicitly required for its advertising functionality. The developer is concerned about potential data exfiltration and privacy violations. Which of the following mobile attack vectors is MOST likely being enabled by these unnecessary permissions?
- APrivilege Escalation
- BMalicious Data Collection
- CSide-Channel Attack
- DSMS Phishing
Show answer & explanationAnswer & explanation
Correct answer: B. Malicious Data Collection
The SDK requesting permissions like `READ_CALL_LOG` and `PROCESS_OUTGOING_CALLS` beyond its stated advertising function directly points to an attempt to collect sensitive user data without legitimate cause, which is a form of malicious data collection and privacy violation.
Why the other options are wrong
- A. Privilege escalation involves gaining higher access than intended, but the scenario describes an SDK already having excessive permissions, enabling data collection, not necessarily escalating its own privileges.
- C. Side-channel attacks exploit information leaked from a system's physical implementation (e.g., power consumption, timing), which is not related to excessive app permissions.
- D. SMS phishing involves tricking users via text messages, not directly enabled by these permissions within an SDK.
Malicious Mobile Data Collection
When mobile applications or embedded SDKs request and use excessive, unnecessary permissions to gather sensitive user data (e.g., call logs, location, contacts) without explicit user consent or legitimate functional need, often for illicit purposes like surveillance or resale.
- Often hidden within legitimate-looking apps or third-party SDKs.
- Leverages 'over-privileged' apps that request more permissions than required.
- Leads to privacy violations and potential data exfiltration.
Memory trick: An app's permissions are like keys; too many open the wrong doors.