Google Android 11.0/12.0 Parcel.cpp ipcSetDataReference use after free

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$5k-$25k0.00

A vulnerability classified as critical was found in Google Android 11.0/12.0 (Smartphone Operating System). Affected by this vulnerability is the function ipcSetDataReference of the file Parcel.cpp. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-416. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

In ipcSetDataReference of Parcel.cpp, there is a possible way to corrupt memory due to a use after free. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-11 Android-12Android ID: A-203847542

The weakness was released 01/15/2022 as A-203847542. It is possible to read the advisory at source.android.com. This vulnerability is known as CVE-2021-39620 since 08/23/2021. 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 pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 01/19/2022). It is expected to see the exploit prices for this product increasing in the near future.

Applying a patch is able to eliminate this problem.

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VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.4

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

NVD Base Score: 7.8
NVD Vector: 🔒

CVSSv2infoedit

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

NVD Base Score: 🔒

Exploitinginfoedit

Class: Memory corruption
CWE: CWE-416
ATT&CK: Unknown

Local: Yes
Remote: No

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfoedit

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

Countermeasuresinfoedit

Recommended: Patch
Status: 🔍

0-Day Time: 🔒

Patch: source.android.com

Timelineinfoedit

08/23/2021 CVE assigned
01/15/2022 +145 days Advisory disclosed
01/15/2022 +0 days VulDB entry created
01/19/2022 +4 days VulDB last update

Sourcesinfoedit

Vendor: https://www.google.com/

Advisory: A-203847542
Status: Confirmed

CVE: CVE-2021-39620 (🔒)
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfoedit

Created: 01/15/2022 07:44 AM
Updated: 01/19/2022 10:54 AM
Changes: (1) source_cve_nvd_summary
Complete: 🔍

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