Google Android on Qualcomm QTEE Syscall race condition

Summaryinfo

A vulnerability, which was classified as problematic, was found in Google Android on Qualcomm. The affected element is an unknown function of the component QTEE Syscall Handler. The manipulation results in race condition. This vulnerability is identified as CVE-2016-10435. The attack can be executed remotely. There is not any exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical has been found in Google Android on Qualcomm (Smartphone Operating System) (affected version not known). Affected is some unknown functionality of the component QTEE Syscall Handler. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

In Android before 2018-04-05 or earlier security patch level on Qualcomm Snapdragon Automobile, Snapdragon Mobile, and Snapdragon Wear MDM9206, MDM9625, MDM9635M, MDM9640, MDM9645, MSM8909W, SD 210/SD 212/SD 205, SD 400, SD 410/12, SD 425, SD 430, SD 450, SD 615/16/SD 415, SD 617, SD 625, SD 650/52, SD 800, SD 808, SD 820, and SD 820A, in some QTEE syscall handlers, a TOCTOU vulnerability exists.

The bug was discovered 04/05/2018. The weakness was released 04/18/2018 (Website). The advisory is shared for download at source.android.com. This vulnerability is traded as CVE-2016-10435 since 08/16/2017. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 01/27/2020). 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†). Entries connected to this vulnerability are available at VDB-83180, VDB-105483, VDB-105484 and VDB-105488. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

• Smartphone Operating System

Vendor

• Google

Name

• Android

License

• free

Website

• Vendor: https://www.google.com/

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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