The IMAP Client for Eudora 5.2.1 allows remote malicious IMAP servers to cause a denial of service and possibly execute arbitrary code via certain large literal size values that cause either integer signedness errors or integer overflow errors.

The IMAP Client for Sylpheed 0.8.11 allows remote malicious IMAP servers to cause a denial of service (crash) via certain large literal size values that cause either integer signedness errors or integer overflow errors.

Buffer overflow in Eudora 5.2.1 allows remote attackers to cause a denial of service (crash and failed restart) and possibly execute arbitrary code via an Attachment Converted argument with a large number of . (dot) characters.

Qualcomm Eudora 5.2.1 allows remote attackers to read arbitrary files via an email message with a carriage return (CR) character in a spoofed "Attachment Converted:" string, which is not properly handled by Eudora.

Eudora 5.1 allows remote attackers to bypass security warnings and possibly execute arbitrary code via attachments with names containing a trailing "." (dot).

Qualcomm Eudora 5.1 allows remote attackers to execute arbitrary code via an HTML e-mail message that uses a file:// URL in a t:video tag to reference an attached Windows Media Player file containing JavaScript code, which is launched and executed in the My Computer zone by Internet Explorer.

Eudora email client 5.1.1, with "use Microsoft viewer" enabled, allows remote attackers to execute arbitrary programs via an HTML email message containing a META refresh tag that references an embedded .mhtml file with ActiveX controls that execute a second embedded program, which is processed by Internet Explorer.

Qualcomm Eudora 5.1.1, 5.2, and possibly other versions stores email attachments in a predictable location, which allows remote attackers to read arbitrary files via a link that loads an attachment with malicious script into a frame, which then executes the script in the local browser context.

Eudora 5.1 and earlier versions stores attachments in a directory with a fixed name, which could make it easier for attackers to exploit vulnerabilities in other software that rely on installing and reading files from directories with known pathnames.

Buffer overflow in Eudora 5.1.1 and 5.0-J for Windows, and possibly other versions, allows remote attackers to execute arbitrary code via a multi-part message with a long boundary string.