Summaryinfo

A vulnerability was found in Google Android 9.0 and classified as critical. This impacts the function serialization of the file StatsLogEventWrapper.java. Such manipulation leads to out-of-bounds write. This vulnerability is uniquely identified as CVE-2018-9522. Local access is required to approach this attack. No exploit exists. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Google Android 9.0 (Smartphone Operating System). It has been rated as critical. Affected by this issue is the function serialization of the file StatsLogEventWrapper.java. The manipulation with an unknown input leads to a out-of-bounds write vulnerability. Using CWE to declare the problem leads to CWE-787. The product writes data past the end, or before the beginning, of the intended buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

In the serialization functions of StatsLogEventWrapper.java, there is a possible out-of-bounds write due to unnecessary functionality which may be abused. This could lead to local escalation of privilege in the system process with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android-9. Android ID: A-112550251

The bug was discovered 11/05/2018. The weakness was disclosed 11/14/2018 (Website). The advisory is shared for download at source.android.com. This vulnerability is handled as CVE-2018-9522 since 04/05/2018. The attack needs to be approached locally. A simple authentication is needed for exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 04/13/2020). It is expected to see the exploit prices for this product increasing in the near future.

The vulnerability was handled as a non-public zero-day exploit for at least 9 days. During that time the estimated underground price was around $25k-$100k.

Applying a patch is able to eliminate this problem.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 105848†). The entries VDB-126869, VDB-126875, VDB-126870 and VDB-126871 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Smartphone Operating System

Vendor

• Google

Name

• Android

Version

• 9.0

License

• free

Website

• Vendor: https://www.google.com/

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