CVE-2021-38788
Malicious apps can use the interface provided by the service to set the number of applications allowed to run in the background to 0 and add themselves to the whitelist, so that once other applications enter the background, they will be forcibly stopped…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
The Background service in Allwinner R818 SoC Android Q SDK V1.0 is used to manage background applications. Malicious apps can use the interface provided by the service to set the number of applications allowed to run in the background to 0 and add themselves to the whitelist, so that once other applications enter the background, they will be forcibly stopped by the system, causing a denial of service.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.68% probability · 76th percentile
- CISA KEV
- Not listed
- Affected
- allwinnertech/android q sdk
- Source
- cve@mitre.org
References
- https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Abackground%20service%20has%20EoP%20Vulnerability.mdBroken Link, Third Party Advisory
- https://vul.wangan.com/a/CNVD-2021-46928Third Party Advisory
- https://www.allwinnertech.com/index.php?c=product&a=index&id=92Product, Vendor Advisory
- https://www.cnvd.org.cn/flaw/show/CNVD-2021-46928Third Party Advisory
- https://github.com/pokerfacett/MY_CVE_CREDIT/blob/master/Allwinner%20R818%20SoC%EF%BC%9Abackground%20service%20has%20EoP%20Vulnerability.mdBroken Link, Third Party Advisory
- https://vul.wangan.com/a/CNVD-2021-46928Third Party Advisory
- https://www.allwinnertech.com/index.php?c=product&a=index&id=92Product, Vendor Advisory
- https://www.cnvd.org.cn/flaw/show/CNVD-2021-46928Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.