Google Android lwis_ioctl.c prepare_io_entry/prepare_response out-of-bounds write

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.0$0-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Google Android. Affected is the function prepare_io_entry/prepare_response of the file lwis_ioctl.c. Such manipulation leads to out-of-bounds write. This vulnerability is documented as CVE-2021-39736. The attack needs to be performed locally. There is not any exploit available. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability was found in Google Android (Smartphone Operating System) (unknown version). It has been rated as critical. Affected by this issue is the function prepare_io_entry/prepare_response of the file lwis_ioctl.c. 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.

The weakness was released 03/17/2022 as A-205995773. The advisory is available at source.android.com. This vulnerability is handled as CVE-2021-39736 since 08/23/2021. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 03/17/2022). 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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Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.2
VulDB Meta Temp Score: 4.0

VulDB Base Score: 4.2
VulDB Temp Score: 4.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds write
CWE: CWE-787 / CWE-119
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

08/23/2021 🔍
03/17/2022 +206 days 🔍
03/17/2022 +0 days 🔍
03/19/2022 +2 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: A-205995773
Status: Confirmed

CVE: CVE-2021-39736 (🔍)
GCVE (CVE): GCVE-0-2021-39736
GCVE (VulDB): GCVE-100-195326
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 03/17/2022 08:08
Updated: 03/19/2022 16:47
Changes: 03/17/2022 08:08 (41), 03/19/2022 16:47 (1)
Complete: 🔍
Cache ID: 216::103

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