KLA12052 Multiple vulnerabilities in Mozilla Thunderbird

Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to bypass security restrictions, cause denial of service, execute arbitrary code, obtain sensitive information.

Below is a complete list of vulnerabilities:

1. A security bypass vulnerability can be exploited to bypass security restrictions.
2. A use-after-free vulnerability can be exploited to potentially cause denial of service.
3. A memory safety vulnerability can be exploited to to cause denial of service and execute arbitrary code.
4. OSI vulnerability can be exploited via special crafted PDF file to obtain sensitive information.
5. A security vulnerability in STARTTLS connection can be exploited to bypass security restrictions.
6. A type cinfusion vulnerability in JavaScript can be exploited to cause denial of service.

Original advisories

MFSA2021-05

Related products

Mozilla-Thunderbird

CVE list

CVE-2020-26976 high

CVE-2021-23960 critical

CVE-2021-23964 critical

CVE-2021-23953 warning

CVE-2021-23954 critical

CVE-2020-15685 critical

Solution

Update to the latest version

Download Thunderbird

Impacts

• ACE

Arbitrary code execution. Exploitation of vulnerabilities with this impact can lead to executing by abuser any code or commands at vulnerable machine or process.

• OSI

Obtain sensitive information. Exploitation of vulnerabilities with this impact can lead to capturing by abuser information, critical for user or system.

• DoS

Denial of service. Exploitation of vulnerabilities with this impact can lead to loss of system availability or critical functional fault.

• SB

Security bypass. Exploitation of vulnerabilities with this impact can lead to performing actions restricted by current security settings.

• SUI

Spoof user interface. Exploitation of vulnerabilities with this impact can lead to changes in user interface to beguile user into inaccurate behavior.

Affected Products

• Mozilla Thunderbird earlier than 78.7