#VU26655 Permissions, Privileges, and Access Controls in Firefox ESR


Published: 2020-04-07

Vulnerability identifier: #VU26655

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-6828

CWE-ID: CWE-264

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Firefox ESR
Client/Desktop applications / Web browsers

Vendor: Mozilla

Description

A malicious Android application could craft an Intent that would have been processed by Firefox for Android and potentially result in a file overwrite in the user's profile directory. One exploitation vector for this would be to supply a user.js file providing arbitrary malicious preference values. Control of arbitrary preferences can lead to sufficient compromise such that it is generally equivalent to arbitrary code execution.

Note: This issue only affects Firefox for Android. Other operating systems are unaffected.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Firefox ESR: 68.0 - 68.6.1, 60.0 - 60.9.0


External links
http://www.mozilla.org/en-US/security/advisories/mfsa2020-13/


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.


Latest bulletins with this vulnerability