php.exe in PHP 3.0 through 4.2.2, when running on Apache, does not terminate properly, which allows remote attackers to cause a denial of service via a direct request without arguments.

Sharman Networks KaZaA Media Desktop 1.7.1 allows remote attackers to cause a denial of service (CPU consumption) by sending several large messages.

Buffer overflow in httpd32.exe in Deerfield VisNetic WebSite before 3.5.15 allows remote attackers to cause a denial of service (crash) via a long HTTP OPTIONS request.

IBM SecureWay Firewall before 4.2.2 performs extra processing before determining that a packet is invalid and dropping it, which allows remote attackers to cause a denial of service (resource exhaustion) via a flood of malformed TCP packets without any flags set.

Cisco IOS 12.0 through 12.2, when supporting SSH, allows remote attackers to cause a denial of service (CPU consumption) via a large packet that was designed to exploit the SSH CRC32 attack detection overflow (CVE-2001-0144).

Memory leak in Cisco Catalyst 4000, 5000, and 6000 series switches allows remote attackers to cause a denial of service via a series of failed telnet authentication attempts.

Windows 95, Windows 98, Windows 2000, Windows NT 4.0, and Terminal Server systems allow a remote attacker to cause a denial of service by sending a large number of identical fragmented IP packets, aka jolt2 or the "IP Fragment Reassembly" vulnerability.