#VU49300 Use-after-free

Published: 2021-01-06 | Updated: 2021-01-19

Vulnerability identifier: #VU49300

Vulnerability risk: High


CVE-ID: CVE-2020-16044


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


The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error when processing COOKIE-ECHO chunk in a SCTP packet. A remote attacker can pass specially crafted data to the browser, trigger a use-after-free error and execute arbitrary code on the system.

Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.

Install updates from vendor's website.

Vulnerable software versions

Mozilla Firefox: 6.0.1 - 84.0.1

Firefox ESR: 78.0 - 78.6.0, 68.0 - 68.12.0, 60.0 - 60.9.0

Firefox for Android: 66.0.4 - 84.1.2


External links

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?

Latest bulletins with this vulnerability