This security advisory describes one medium risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to perform a spoofing attack.
The vulnerability exists due to insecure implementation of the STARTTLS buffering for IMAP, SMTP, and POP3 protocols. A remote attacker can inject arbitrary data into the TLS context during MitM attack, e.g. perform a response injection attack.
Install updates from vendor's website.Vulnerable software versions
Mutt: 1.14, 1.14.1, 1.14.2, 1.14.3CPE
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.
How the attacker can exploit this vulnerability?
The attacker would have to trick the victim to visit a specially crafted website or open an attachment in an e-mail message.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.