Vulnerability identifier: #VU47430

Vulnerability risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-0246

CWE-ID: CWE-284

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Google Android
Operating systems & Components / Operating system

Vendor: Google

Description

The vulnerability allows a local application to gain unauthorized access to otherwise restricted functionality.

The vulnerability exists due to EuiccController in Android Framework does not validate the calling package name to ensure that it is owned by the calling UID. A local application can abuse this behavior to gain carrier  privileges in the call to EuiccController#getEid by passing the package name of another app that does have carrier privileges to one or more subscriptions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Google Android: 11, 10

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External links
http://source.android.com/security/bulletin/2020-10-01
http://android.googlesource.com/platform/frameworks/opt/telephony/+/cfaf9f980aa8d3ca51cd8555ca27cd0ef561cb02

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.