Red Hat Enterprise Linux 8.2 update for thunderbird

Published: 2021-01-14
Risk High
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2020-16044
Exploitation vector Network
Public exploit N/A
Vulnerable software
thunderbird (Red Hat package)
Operating systems & Components / Operating system package or component

Red Hat Enterprise Linux Server - TUS
Operating systems & Components / Operating system

Vendor Red Hat Inc.

Security Advisory

This security advisory describes one high risk vulnerability.

1) Use-after-free

Risk: High

CVSSv3: 7.7 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2020-16044

CWE-ID: CWE-416 - Use After Free

Exploit availability: No


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

thunderbird (Red Hat package): 68.8.0-1.el8_2, 68.9.0-1.el8_2, 68.10.0-1.el8_2, 78.3.1-1.el8_2, 78.4.0-1.el8_2, 78.4.3-1.el8_2, 78.5.0-1.el8_2, 78.5.1-1.el8_2, 78.6.0-1.el8_2

Red Hat Enterprise Linux Server - TUS: 8.2

CPE External links

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.