SB2020051204 - Red Hat Enterprise Linux 8 update for thunderbird
Published: May 12, 2020 Updated: July 1, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Buffer overflow (CVE-ID: CVE-2020-6831)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing SCTP chunks in WebRTC. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
2) Use-after-free (CVE-ID: CVE-2020-12387)
The vulnerability allows a remote attacker to compromise vulnerable system.
The vulnerability exists due to a use-after-free error caused by the race condition when running shutdown code for Web Worker. A remote attacker can create a specially crafted website, trick the victim into visiting it, trigger a use-after-free error and execute arbitrary code on the target system.
Successful exploitation of the vulnerability may allow an attacker to compromise vulnerable system.
3) Input validation error (CVE-ID: CVE-2020-12392)
The vulnerability allows a remote attacker to bypass implemented security restrictions.
The vulnerability exists due to the "Copy as cURL" feature of Devtools network tab did not properly escape the HTTP POST data of a request, which can be controlled by the website. If a user used the 'Copy as cURL' feature and pasted the command into a terminal, it could have resulted in the disclosure of local files.
4) Buffer overflow (CVE-ID: CVE-2020-12395)
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error when processing HTML content. A remote attacker can create a specially crafted web page, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
5) Spoofing attack (CVE-ID: CVE-2020-12397)
The vulnerability allows a remote attacker to perform spoofing attack.
The vulnerability exists due to incorrect processing of sender email addresses. A remote attacker can spoof an email address using encoded Unicode characters.
Remediation
Install update from vendor's website.