Multiple integer signedness errors in the NTLM implementation in Atrium MERCUR IMAPD (mcrimap4.exe) 5.00.14, with SP4, allow remote attackers to execute arbitrary code via a long NTLMSSP argument that triggers a stack-based buffer overflow.
Multiple buffer overflows in MERCUR Messaging 2005 before Service Pack 4 allow remote attackers to cause a denial of service (crash) via (1) "long command lines at port 32000" and (2) certain name service queries that are not properly handled by the SMTP service.
The IMAP4 service in MERCUR Messaging 2005 before Service Pack 4 allows remote attackers to cause a denial of service (crash) via a message with a long subject field.
Unspecified vulnerability in MERCUR Messaging 2005 before Service Pack 4 allows remote attackers to cause a denial of service (crash) via a TOP command to the POP3 service.
The SMTP service in MERCUR Messaging 2005 before Service Pack 4 allows remote attackers to cause a denial of service (infinite loop) via a message in which neither the originator nor recipient address is known.
Buffer overflow in the base64 decoder in MERCUR Mailserver 4.2 before SP3a allows remote attackers to cause a denial of service and possibly execute arbitrary code via a long (1) AUTH command to the POP3 server or (2) AUTHENTICATE command to the IMAP server.