MXQ TV Box 4.4.2 com.android.server.MasterClearReceiver Factory Reset permission

Summaryinfo

A vulnerability labeled as critical has been found in MXQ TV Box 4.4.2. Impacted is an unknown function of the component com.android.server.MasterClearReceiver. Such manipulation leads to permission (Factory Reset). This vulnerability is traded as CVE-2018-14987. An attack has to be approached locally. There is no exploit available.

Detailsinfo

A vulnerability was found in MXQ TV Box 4.4.2. It has been rated as critical. Affected by this issue is an unknown part of the component com.android.server.MasterClearReceiver. The manipulation with an unknown input leads to a permission vulnerability (Factory Reset). Using CWE to declare the problem leads to CWE-275. Impacted is integrity, and availability. CVE summarizes:

The MXQ TV Box 4.4.2 Android device with a build fingerprint of MBX/m201_N/m201_N:4.4.2/KOT49H/20160106:user/test-keys contains the Android framework with a package name of android (versionCode=19, versionName=4.4.2-20170213) that dynamically registers a broadcast receiver app component named com.android.server.MasterClearReceiver instead of statically registering it in the AndroidManifest.xml file of the core Android package, as done in Android Open Source Project (AOSP) code for Android 4.4.2. The dynamic-registration of the MasterClearReceiver broadcast receiver app component is not protected with the android.permission.MASTER_CLEAR permission during registration, so any app co-located on the device, even those without any permissions, can programmatically initiate a factory reset of the device. A factory reset will remove all user data and apps from the device. This will result in the loss of any data that have not been backed up or synced externally. The capability to perform a factory reset is not directly available to third-party apps (those that the user installs themselves with the exception of enabled Mobile Device Management (MDM) apps), although this capability can be obtained by leveraging an unprotected app component of core Android process.

The bug was discovered 08/05/2018. The weakness was shared 12/28/2018 (Website). The advisory is available at kryptowire.com. This vulnerability is handled as CVE-2018-14987 since 08/05/2018. Local access is required to approach this attack. A simple authentication is necessary for exploitation. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

The vulnerability was handled as a non-public zero-day exploit for at least 145 days. During that time the estimated underground price was around $0-$5k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The entries VDB-123382, VDB-123383, VDB-123384 and VDB-128470 are related to this item. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• MXQ

Name

• TV Box

Version

• 4.4.2

CPE 2.3info

• 🔍

CPE 2.2info

• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Discussion