KLA12261 Multiple vulnerabilities in Mozilla Thunderbird

Multiple vulnerabilities were found in Mozilla Thunderbird. Malicious users can exploit these vulnerabilities to obtain sensitive information, cause denial of service, gain privileges, spoof user interface.

Below is a complete list of vulnerabilities:

1. A type confusion vulnerability in JIT optimization can be exploited to obtain sensitive information.
2. A denial of service vulnerability in JIT can be exploited to cause denial of service.
3. A security UI vulnerability on Linux can be exploited to spoof user interface and gain privileges.

Original advisories

MFSA2021-36

Related products

Mozilla-Thunderbird

CVE list

CVE-2021-29981 unknown

CVE-2021-29982 unknown

CVE-2021-29987 unknown

Solution

Update to the latest version

Download Thunderbird

Impacts

• 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.

• PE

Privilege escalation. Exploitation of vulnerabilities with this impact can lead to performing by abuser actions, which are normally disallowed for current role.

• 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 91