ROS-2-525

2.525 Vulnerability in Mozilla Thunderbird email client (CVE-2021-29970, CVE-2021-30547, CVE-2021-29976, CVE-2021-29969).

1. Vulnerability Description:

CVE-2021-29970 Vulnerability in Mozilla Thunderbird email client, related to HTML content processing error. Exploitation of the vulnerability could allow a remote attacker to cause a post-release exploit error and execute arbitrary code on the system.
CVE-2021-30547 Vulnerability in Mozilla Thunderbird email client, related to a boundary error in processing unreliable HTML content in ANGLE. Exploitation of the vulnerability could allow a remote attacker to create a customized web page, trick the victim into opening it, initiate an out-of-range write, and execute arbitrary code on the target system.
CVE-2021-29976 Vulnerability in Mozilla Thunderbird email client, related to a boundary error in HTML processing. Exploitation of the vulnerability could allow a remote attacker to create a customized web page, trick the victim into opening it, cause memory corruption and execute arbitrary code on the target system.
CVE-2021-29969 Vulnerability in Mozilla Thunderbird email client, related to the way IMAP server responses sent before the STARTTLS process are handled. Exploitation of the vulnerability could allow a remote attacker to perform a MitM attack and send arbitrary IMAP commands before STARTTLS confirmation and execute them after the confirmation is complete.
FSTEC Information Security Threat Data Bank Identifier: BDU:2021-03659, BDU:2021-03660, BDU:2021-03661, BDU:2021-03662OS version: 7.2

2. Possible remedial measures to address the vulnerability

Do not use Mozilla Thunderbird
or

• install security updates for the package:
  thunderbird
  **Installing updates is possible in the following ways:****a)**if the computer with the installed OS version has access to the vendor’s official repository, you need to run the update as administrator with the command:
  # yum update.
  After the list of updated packages is displayed, agree to apply the updates by pressing the Y key on the keyboard. Wait for the updates to finish installing and make sure that there are no errors during their installation.
  b) if the computer with the installed OS version does not have access to the vendor’s official repository, you should perform the following actions:
• download the updated package (with dependencies if necessary):
  http://repo.red-soft.ru/redos/7.2c/x86_64/updates/thunderbird-78.12.0-1.el7.2.x86_64.rpm
  Check the integrity and authenticity of the package according to instructions
  Install the downloaded package(s) with the command:
  # yum localinstall *.rpm.
  After the list of packages to be updated is displayed, agree to apply the updates by pressing the Y key on your keyboard. Wait for the updates to finish installing and make sure there are no errors during the installation.

Date of last modification: 26.02.2022