Google Android on Qualcomm Widevine widevine_dash_cmd_handler memory corruption

Summaryinfo

A vulnerability categorized as critical has been discovered in Google Android on Qualcomm. This affects the function widevine_dash_cmd_handler of the component Widevine. Executing a manipulation can lead to memory corruption. The identification of this vulnerability is CVE-2015-9157. The attack may be launched remotely. There is no exploit available. It is advisable to implement a patch to correct this issue.

Detailsinfo

A vulnerability was found in Google Android on Qualcomm (Smartphone Operating System) (affected version unknown). It has been declared as critical. This vulnerability affects the function widevine_dash_cmd_handler of the component Widevine. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Mobile and Snapdragon Wear IPQ4019, MDM9206, MDM9607, MDM9625, MDM9635M, MSM8909W, SD 210/SD 212/SD 205, SD 400, SD 410/12, SD 600, SD 615/16/SD 415, SD 617, SD 650/52, SD 800, SD 808, and SD 810, in widevine_dash_cmd_handler(), rsp buffers are passed off to widevine commands. These rsp buffers have values in them, such as buffer lengths, that need to be validated to ensure that no buffer overflow/over-reads happen. However, rsp buffers are not always in locked memory, meaning a time-of-check, time-of-use issue can occur where we check that the value is valid, but then a race condition occurs where this memory is swapped out with a different, possibly out of range, value.

The bug was discovered 04/05/2018. The weakness was shared 04/18/2018 (Website). The advisory is shared for download at source.android.com. This vulnerability was named CVE-2015-9157 since 08/16/2017. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 01/26/2020). 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 13 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 103671†). The entries VDB-83180, VDB-105483, VDB-105484 and VDB-105488 are related to this item. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Smartphone Operating System

Vendor

• Google

Name

• Android

License

• free

Website

• Vendor: https://www.google.com/

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Once again VulDB remains the best source for vulnerability data.

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