Vulnerability Details CVE-2019-15027
The MediaTek Embedded Multimedia Card (eMMC) subsystem for Android on MT65xx, MT66xx, and MT8163 SoC devices allows attackers to execute arbitrary commands as root via shell metacharacters in a filename under /data, because clear_emmc_nomedia_entry in platform/mt6577/external/meta/emmc/meta_clr_emmc.c invokes 'system("/system/bin/rm -r /data/' followed by this filename upon an eMMC clearance from a Meta Mode boot. NOTE: compromise of Fire OS on the Amazon Echo Dot would require a second hypothetical vulnerability that allows creation of the required file under /data.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.024
EPSS Ranking 84.2%
CVSS Severity
CVSS v3 Score 9.8
CVSS v2 Score 10.0
References
- https://dojo.bullguard.com/dojo-by-bullguard/blog/gaining-rooting-primitives-for-android-mediatek-chips/
- https://github.com/andr3jx/MTK6577/blob/238012ebf18e3751397884d1742ff7ab6417e80d/mediatek/platform/mt6577/external/meta/emmc/meta_clr_emmc.c#L302-L305
- https://dojo.bullguard.com/dojo-by-bullguard/blog/gaining-rooting-primitives-for-android-mediatek-chips/
- https://github.com/andr3jx/MTK6577/blob/238012ebf18e3751397884d1742ff7ab6417e80d/mediatek/platform/mt6577/external/meta/emmc/meta_clr_emmc.c#L302-L305
Products affected by CVE-2019-15027
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cpe:2.3:h:mediatek:mt6577:-
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cpe:2.3:h:mediatek:mt6625:-
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cpe:2.3:h:mediatek:mt8163:-
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cpe:2.3:o:mediatek:mt6577_firmware:-
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cpe:2.3:o:mediatek:mt6625_firmware:-
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cpe:2.3:o:mediatek:mt8163_firmware:-