Vulnerability identifier: #VU88655

Vulnerability risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-3855

CWE-ID: CWE-1037

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Mozilla Firefox
Client/Desktop applications / Web browsers
Firefox for Android
Mobile applications / Apps for mobile phones

Vendor: Mozilla

Description

The vulnerability allows a remote attacker to compromise the affected system.

The vulnerability exists due to JIT incorrectly optimized MSubstr operations. A remote attacker can trick the victim to visit a specially crafted website, trigger an out-of-bounds read and potentially compromise the affected system.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 116.0 - 124.0.2

Firefox for Android: 116.0 - 124.2.0

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

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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.