CVE-2021-41848

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Summary

CVECVE-2021-41848
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2022-03-11 23:15:00 UTC
Updated2022-07-12 17:42:00 UTC
DescriptionAn issue was discovered in Luna Simo PPR1.180610.011/202001031830. It mishandles software updates such that local third-party apps can provide a spoofed software update file that contains an arbitrary shell script and arbitrary ARM binary, where both will be executed as the root user with an SELinux domain named osi. To exploit this vulnerability, a local third-party app needs to have write access to external storage to write the spoofed update at the expected path. The vulnerable system binary (i.e., /system/bin/osi_bin) does not perform any authentication of the update file beyond ensuring that it is encrypted with an AES key (that is hard-coded in the vulnerable system binary). Processes executing with the osi SELinux domain can programmatically perform the following actions: install apps, grant runtime permissions to apps (including permissions with protection levels of dangerous and development), access extensive Personally Identifiable Information (PII) using the programmatically grant permissions, uninstall apps, set the default launcher app to a malicious launcher app that spoofs other apps, set a network proxy to intercept network traffic, unload kernel modules, set the default keyboard to a keyboard that has keylogging functionality, examine notification contents, send text messages, and more. The spoofed update can optionally contain an arbitrary ARM binary that will be locally stored in internal storage and executed at system startup to achieve persistent code execution as the root user with the osi SELinux domain. This ARM binary will continue to execute at startup even if the app that provided the spoofed update is uninstalled.

Risk And Classification

Problem Types: CWE-798

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Hardware Bluproducts G9 - All All All
Hardware Bluproducts G90 - All All All
Operating System Bluproducts G90 Firmware - All All All
Operating System Bluproducts G9 Firmware - All All All
Hardware Luna Simo - All All All
Operating System Luna Simo Firmware - All All All
Hardware Wikomobile Tommy 3 - All All All
Operating System Wikomobile Tommy 3 Firmware - All All All
Hardware Wikomobile Tommy 3 Plus - All All All
Operating System Wikomobile Tommy 3 Plus Firmware - All All All

References

ReferenceSourceLinkTags
SIMO - the Ultimate Connectivity App MISC simowireless.com
Virtual SIM (vSIM) Vulnerability Within Simo Android Phones Exposed MISC www.kryptowire.com
Page Not Found | Kryptowire MISC www.kryptowire.com
@Hack | Infosec on the Edge | 28 - 30 November 2021 MISC athack.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis
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