Google Android Shared Memory ashmem.c calc_vm_may_flags default permission

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, was found in Google Android. Affected by this issue is the function calc_vm_may_flags of the file ashmem.c of the component Shared Memory. Executing a manipulation can lead to default permission. This vulnerability is tracked as CVE-2020-0009. The attack is restricted to local execution. Moreover, an exploit is present. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical was found in Google Android (Smartphone Operating System) (affected version not known). This vulnerability affects the function calc_vm_may_flags of the file ashmem.c of the component Shared Memory. The manipulation with an unknown input leads to a default permission vulnerability. The CWE definition for the vulnerability is CWE-276. During installation, installed file permissions are set to allow anyone to modify those files. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In calc_vm_may_flags of ashmem.c, there is a possible arbitrary write to shared memory due to a permissions bypass. This could lead to local escalation of privilege by corrupting memory shared between processes, with no additional execution privileges needed. User interaction is not needed for exploitation. Product: Android Versions: Android kernel Android ID: A-142938932

The weakness was disclosed 01/08/2020 (Website). The advisory is available at source.android.com. This vulnerability was named CVE-2020-0009 since 10/17/2019. Local access is required to approach this attack. A single authentication is required for exploitation. Technical details and also a public exploit are known. This vulnerability is assigned to T1222 by the MITRE ATT&CK project.

It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. As 0-day 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 Exploit-DB (47921). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Default permission
CWE: CWE-276 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: No

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Exploit-DB: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Timelineinfo

10/17/2019 🔍
01/08/2020 +83 days 🔍
01/08/2020 +0 days 🔍
06/06/2024 +1611 days 🔍

Sourcesinfo

Vendor: google.com

Advisory: 155903
Status: Not defined

CVE: CVE-2020-0009 (🔍)
GCVE (CVE): GCVE-0-2020-0009
GCVE (VulDB): GCVE-100-148402
scip Labs: https://www.scip.ch/en/?labs.20150917

Entryinfo

Created: 01/08/2020 19:08
Updated: 06/06/2024 04:34
Changes: 01/08/2020 19:08 (40), 01/08/2020 19:13 (18), 03/20/2024 08:32 (18), 03/20/2024 08:35 (1), 06/06/2024 04:34 (11)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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