An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.

Security update for cyrus-imapd

Affected: Ubuntu:Pro:18.04:LTS: cyrus-imapd, Ubuntu:Pro:20.04:LTS: cyrus-imapd, Ubuntu:Pro:22.04:LTS: cyrus-imapd, Ubuntu:Pro:24.04:LTS: cyrus-imapd, Ubuntu:26.04:LTS: cyrus-imapd

An issue was discovered in cyrus-imapd in Cyrus IMAP through 3.12.2. There is heap exposure in nested MIME comment parsing. An authenticated IMAP user could craft an email message containing an RFC 822 comment ending with a backslash. When parsing the message, the server would read past the message's end in memory, and read into the heap, returning the read content to the user.

Ein Angreifer kann mehrere Schwachstellen in cyrus imap ausnutzen, um Sicherheitsvorkehrungen zu umgehen und Daten offenzulegen oder zu manipulieren.