Possible Blocking of Internet Traffic Through VPN Due to Bad UID Check

CVE-2018-9487

What is CVE-2018-9487?

A vulnerability exists in the Android operating system's VPN services, specifically in the setVpnForcedLocked function of Vpn.java. This flaw is caused by an inadequate check of user identifiers (UIDs), which can lead to a situation where the internet traffic is inadvertently blocked when using a VPN. Exploitation of this vulnerability can result in a local denial of service, affecting the user's ability to access the internet through the VPN. A user interaction is required to exploit this issue, increasing the complexity of its exploitation.

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