VDB-126888 · CVE-2018-9539 · BID 105865

Google Android 8.0/8.1/9.0 ClearKey CAS Descrambler race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.9$0-$5k0.00

Summaryinfo

A vulnerability was found in Google Android 8.0/8.1/9.0. It has been declared as critical. This vulnerability affects unknown code of the component ClearKey CAS Descrambler. The manipulation results in race condition. This vulnerability was named CVE-2018-9539. The attack needs to be approached locally. There is no available exploit. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Google Android 8.0/8.1/9.0 (Smartphone Operating System). It has been classified as critical. Affected is some unknown processing of the component ClearKey CAS Descrambler. 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 the ClearKey CAS descrambler, there is a possible use after free due to a race condition. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android. Versions: Android-8.0 Android-8.1 Android-9. Android ID: A-113027383

The bug was discovered 11/05/2018. The weakness was presented 11/14/2018 (Website). The advisory is shared for download at source.android.com. This vulnerability is traded as CVE-2018-9539 since 04/05/2018. The attack needs to be approached locally. Required for exploitation is a authentication. There are neither technical details nor an exploit publicly available.

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 105865†). See VDB-126869, VDB-126875, VDB-126870 and VDB-126871 for similar entries. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.0

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.0
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/05/2018 🔍
11/05/2018 +214 days 🔍
11/05/2018 +0 days 🔍
11/14/2018 +9 days 🔍
11/14/2018 +0 days 🔍
11/15/2018 +1 days 🔍
04/13/2020 +515 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: source.android.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-9539 (🔍)
GCVE (CVE): GCVE-0-2018-9539
GCVE (VulDB): GCVE-100-126888
SecurityFocus: 105865 - Google Android Media Framework Component Multiple Security Vulnerabilities

scip Labs: https://www.scip.ch/en/?labs.20150917
See also: 🔍

Entryinfo

Created: 11/15/2018 09:50
Updated: 04/13/2020 10:24
Changes: 11/15/2018 09:50 (62), 04/13/2020 10:24 (4)
Complete: 🔍
Cache ID: 216::103

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

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