Vulnerability identifier: #VU48781

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8913

CWE-ID: CWE-22

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Play Core Library
Mobile applications / Libraries for mobile applications

Vendor: Google

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to input validation error when processing directory traversal sequences inside apk files in Android's Play Core Library within the SplitCompat.install endpoint. A remote attacker can create a specially crafted APK file that targets a specific application, trick the victim into installing that APK and gain full access to the targeted application.

Successful exploitation of the vulnerability may allow an attacker to compromise the affected system but requires that the victim willingly installs a malicious application.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Play Core Library: 1.3.6 - 1.7.1

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External links
http://blog.oversecured.com/Oversecured-automatically-discovers-persistent-code-execution-in-the-Google-Play-Core-Library/
http://developer.android.com/reference/com/google/android/play/core/release-notes#1-7-2

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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