Permissions, Privileges, and Access Controls in firefox (Alpine package)

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU48477

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-26964

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a local application to escalate privileges on the system.

The vulnerability exists due to the way Remote Debugging via USB feature behaves on older versions of Android OS. If the Remote Debugging via USB feature was enabled in Firefox for Android on an Android version prior to Android 6.0, untrusted apps could have connected to the feature and operated with the privileges of the browser to read and interact with web content. The feature was implemented as a unix domain socket, protected by the Android SELinux policy; however, SELinux was not enforced for versions prior to 6.0.

Mitigation

Install update from vendor's website.

Vulnerable software versions

firefox (Alpine package): 76.0.1-r1 - 77.0.1-r4

External links

http://git.alpinelinux.org/aports/commit/?id=13a8f0d1284680f721e935cc6d3cb2649cf25093

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.