#VU62757 Permissions, Privileges, and Access Controls in Mozilla Firefox and Firefox ESR - CVE-2022-29909

Vulnerability identifier: #VU62757

Vulnerability risk: High

CVSSv4.0: 6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber]

CVE-ID: CVE-2022-29909

CWE-ID: CWE-264

Exploitation vector: Network

Exploit availability: No

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

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due improper management of permissions within the application. Documents in deeply-nested cross-origin browsing contexts can obtain permissions granted to the top-level origin. A remote attacker can create a web page that bypasses the existing browser prompt and wrongfully inherits the top-level permissions.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 70.0 - 99.0.1

Firefox ESR: 78.0 - 78.15.0, 91.0 - 91.8.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2022-16/
https://www.mozilla.org/en-US/security/advisories/mfsa2022-17/

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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.