Horizon Alert
Summary of the vulnerability and why it matters
A logic error in Android's phone interface manager could allow unauthorized disabling of carrier restrictions, potentially leading to privilege escalation on a device without user interaction. The main concern is confirming relevance and exposure, as this vulnerability appears to be local to the device and not exploitable over the network.
- Logic error bypasses carrier restrictions.
- Local privilege escalation is possible.
- Confirm relevance and local exposure.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this vulnerability by initiating a local action on a device, targeting the `setAllowedCarriers` function within the PhoneInterfaceManager. This function's logic error allows for the disabling of carrier restrictions, potentially leading to privilege escalation.
- No network access required.
- Triggered by modifying carrier settings.
- Allows local privilege escalation.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could potentially allow an attacker to bypass carrier restrictions on a device, leading to a local privilege escalation. User interaction is not required for exploitation, and the flaw exists within the `setAllowedCarriers` function in `PhoneInterfaceManager.java`.
- Device carrier restrictions could be disabled.
- Logic error allows privilege escalation.
- Unauthorized control over carrier settings.
Operational Fix
Recommended remediation, mitigation, and detection steps
This critical vulnerability in Android's telephony stack allows for local privilege escalation without user interaction. The affected component, `setAllowedCarriers` within `PhoneInterfaceManager.java`, has a logic error that could disable carrier restrictions. Given this is a local privilege escalation, the primary responsibility falls to device owners and administrators to identify affected devices, assess business criticality, and plan remediation, potentially involving coordination with mobile device management (MDM) or original equipment manufacturers (OEMs) if direct patching is not feasible.
- Identify affected devices and owners.
- Verify reachability and business criticality.
- Plan phased remediation or risk reduction.
