Advisory Details

August 2nd, 2018

(Pwn2Own) Huawei App Market JavaScript Bridge Privilege Escalation Vulnerability

CVE ID	CVE-2018-7932
CVSS SCORE	4.4, AV:L/AC:M/Au:N/C:P/I:P/A:P
AFFECTED VENDORS	Huawei
AFFECTED PRODUCTS	App Market
TREND MICRO CUSTOMER PROTECTION	Trend Micro TippingPoint IPS customers are protected against this vulnerability by Digital Vaccine protection filter ID ['29906']. For further product information on the TippingPoint IPS: http://www.tippingpoint.com
VULNERABILITY DETAILS	This vulnerability allows remote attackers to escalate privileges on vulnerable installations of Huawei App Market. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of the launchApp method within the HiSpaceObject JavaScript interface. The issue lies in the lack of verification of the user-supplied arguments. An attacker can leverage this vulnerability to escalate privileges to resources normally protected from the application.
ADDITIONAL DETAILS	Huawei has issued an update to correct this vulnerability. More details can be found at: https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20180423-01-app-en
DISCLOSURE TIMELINE	2017-11-01 - Vulnerability reported to vendor 2018-08-02 - Coordinated public release of advisory 2018-08-02 - Advisory Updated
CREDIT	MWR Labs - Alex Plaskett James Loureiro Robert Miller and Georgi Geshev

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