Ubuntu Security Notice 4566-1 - It was discovered that Cyrus IMAP Server could execute arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name. An attacker could use this vulnerability to cause a crash or possibly execute arbitrary code. It was discovered that the Cyrus IMAP Server allow users to create any mailbox with administrative privileges. A local attacker could use this to obtain sensitive information. Various other issues were also addressed.
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Red Hat Security Advisory 2019-1771-01 - The cyrus-imapd packages contain a high-performance mail server with IMAP, POP3, NNTP, and SIEVE support. Issues addressed include a buffer overflow vulnerability.
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Debian Linux Security Advisory 4458-1 - A flaw was discovered in the CalDAV feature in httpd of the Cyrus IMAP server, leading to denial of service or potentially the execution of arbitrary code via a crafted HTTP PUT operation for an event with a long iCalendar property name.
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