#VU97918 Permissions, Privileges, and Access Controls in Mozilla products - CVE-2024-9394

Vulnerability identifier: #VU97918

Vulnerability risk: Medium

CVSSv4.0: 1.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2024-9394

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
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

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

The vulnerability exists due to application does not properly impose security restrictions. A remote attacker can send a specially crafted multipart response and execute arbitrary JavaScript under the resource://devtools origin. This could allow them to access cross-origin JSON content.

Note, this access is limited to "same site" documents by the Site Isolation feature on desktop clients, however full cross-origin access is possible on Android.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 130.0.1

Firefox for Android: 100.1.0 - 130.0.1

Firefox ESR: 102.0 - 102.15.1, 115.0 - 115.15.0, 128.0 - 128.2.0

---

External links
https://www.mozilla.org/en-US/security/advisories/mfsa2024-46/
https://bugzilla.mozilla.org/show_bug.cgi?id=1918874
https://www.mozilla.org/en-US/security/advisories/mfsa2024-47/
https://www.mozilla.org/en-US/security/advisories/mfsa2024-48/

---

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.