Remote code execution in Mozilla Firefox and Firefox ESR

1) Use-after-free

EUVDB-ID: #VU98333

Risk: Critical

CVSSv4.0: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red]

CVE-ID: CVE-2024-9680

CWE-ID: CWE-416 - Use After Free

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in Animation timeline. A remote attacker can trick the victim into visiting a specially crafted website, trigger a use-after-free error and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited in the wild.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 100.0 - 131.0

Firefox ESR: 102.0 - 128.3.0

Firefox for Android: 100.1.0 - 131.0

CPE2.3

• cpe:2.3:a:mozilla:mozilla_firefox:100.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:100.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:mozilla_firefox:100.0.2:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.0.1:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.1.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.2.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.3.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.4.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_esr:102.5.0:*:*:*:*:*:*:*
• cpe:2.3:a:mozilla:firefox_for_android:100.1.0:*:*:*:*:*:*:*

External links

https://bugzilla.mozilla.org/show_bug.cgi?id=1923344
https://www.mozilla.org/security/advisories/mfsa2024-51/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to visit a specially crafted website.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.