Vulnerability identifier: #VU50038
Vulnerability risk: Medium
Exploitation vector: Network
The vulnerability allows a remote attacker to bypass certain security restrictions.
The vulnerability exists due to improper input validation when processing plaintext phase of the IMAP STARTTLS connection setup. A remote attacker can pass protocol commands, which can be evaluated within the encrypted session.
Install updates from vendor's website.
Vulnerable software versions
Mozilla Thunderbird: 78.0 - 78.6.1, 68.0 - 68.12.1, 60.0 - 60.9.1
Fixed software versions
Can this vulnerability be exploited remotely?
Is there known malware, which exploits this vulnerability?