Summaryinfo

A vulnerability identified as critical has been detected in Google Android. Affected is the function driver_override_store/driver_override_show of the file bus.c. This manipulation causes double free. The identification of this vulnerability is CVE-2018-9415. The attack can only be executed locally. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Google Android (Smartphone Operating System) (affected version not known) and classified as critical. Affected by this vulnerability is the function driver_override_store/driver_override_show of the file bus.c. The manipulation with an unknown input leads to a double free vulnerability. The CWE definition for the vulnerability is CWE-415. The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In driver_override_store and driver_override_show of bus.c, there is a possible double free due to improper locking. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-69129004 References: Upstream kernel.

The bug was discovered 07/03/2018. The weakness was shared 11/06/2018 (Website). It is possible to read the advisory at usn.ubuntu.com. This vulnerability is known as CVE-2018-9415 since 04/05/2018. The exploitation appears to be easy. Attacking locally is a requirement. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability was handled as a non-public zero-day exploit for at least 52 days. During that time the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 112110 (Ubuntu 16.04 LTS : linux-hwe vulnerabilities (USN-3752-2)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 197240 (Ubuntu Security Notification for Linux, Linux-aws, Linux-gcp, Linux-kvm, Linux-raspi2 Vulnerabilities (USN-3752-1)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (112110). The entries VDB-120532, VDB-120533, VDB-120534 and VDB-120535 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Smartphone Operating System

Vendor

• Google

Name

• Android

License

• free

Website

• Vendor: https://www.google.com/

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