Serv-U FTP Server before 6.1.0.4 allows attackers to cause a denial of service (crash) via (1) malformed packets and possibly other unspecified issues with unknown impact and attack vectors including (2) use of "~" in a pathname, and (3) memory consumption of the daemon. NOTE: it is not clear whether items (2) and above are vulnerabilities.

Serv-U FTP Server 4.1 (possibly 4.0) allows remote attackers to cause a denial of service (application crash) via a SITE CHMOD command with a "\\...\" followed by a short string, causing partial memory corruption, a different vulnerability than CVE-2004-2111.

Serv-U FTP server before 5.1.0.0 has a default account and password for local administration, which allows local users to execute arbitrary commands by connecting to the server using the default administrator account, creating a new user, logging in as that new user, and then using the SITE EXEC command.

Stack-based buffer overflow in the site chmod command in Serv-U FTP Server before 4.2 allows remote attackers to execute arbitrary code via a long filename.

Buffer overflow in Serv-U ftp before 5.0.0.4 allows remote authenticated users to execute arbitrary code via a long time zone argument to the MDTM command.

Serv-U FTP server 4.x and 5.x allows remote attackers to cause a denial of service (application crash) via a STORE UNIQUE (STOU) command with an MS-DOS device name argument such as (1) COM1, (2) LPT1, (3) PRN, or (4) AUX.

Buffer overflow in Serv-U FTP server before 5.0.0.6 allows remote attackers to cause a denial of service (crash) via a long -l parameter, which triggers an out-of-bounds read.

Serv-U FTP server 3.0, 3.1 and 4.0.0.4 does not accept new connections while validating user folder access rights, which allows remote attackers to cause a denial of service (no new connections) via a series of MKD commands.

The remote administration client for RhinoSoft Serv-U 3.0 sends the user password in plaintext even when S/KEY One-Time Password (OTP) authentication is enabled, which allows remote attackers to sniff passwords.

Directory traversal vulnerability in FTP Serv-U before 2.5i allows remote attackers to escape the FTP root and read arbitrary files by appending a string such as "/..%20." to a CD command, a variant of a .. (dot dot) attack.