#VU88631 Use-after-free in Mozilla products - CVE-2024-3861

Vulnerability identifier: #VU88631

Vulnerability risk: Low

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

CVE-ID: CVE-2024-3861

CWE-ID: CWE-416

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 crash the browser.

The vulnerability exists due to a use-after-free error. If an AlignedBuffer were assigned to itself, the subsequent self-move could result in an incorrect reference count and later use-after-free.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 124.0.2

Firefox ESR: 102.0 - 102.15.1, 115.0 - 115.9.1

Firefox for Android: 100.1.0 - 124.2.0

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External links
https://www.mozilla.org/en-US/security/advisories/mfsa2024-18/
https://www.mozilla.org/en-US/security/advisories/mfsa2024-19/

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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.