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Tag: User Datagram Protocol (UDP)

The User Datagram Protocol (UDP) is one of the core members of the Internet protocol suite. The protocol was designed by David P. Reed in 1980 and formally defined in RFC 768.

UDP uses a simple connectionless transmission model with a minimum of protocol mechanism. It has no handshaking dialogues, and thus exposes the user’s program to any unreliability of the underlying network protocol. There is no guarantee of delivery, ordering, or duplicate protection. UDP provides checksums for data integrity, and port numbers for addressing different functions at the source and destination of the datagram.

With UDP, computer applications can send messages, in this case referred to as datagrams, to other hosts on an Internet Protocol (IP) network without prior communications to set up special transmission channels or data paths. UDP is suitable for purposes where error checking and correction is either not necessary or is performed in the application, avoiding the overhead of such processing at the network interface level. Time-sensitive applications often use UDP because dropping packets is preferable to waiting for delayed packets, which may not be an option in a real-time system. If error correction facilities are needed at the network interface level, an application may use the Transmission Control Protocol (TCP) or Stream Control Transmission Protocol (SCTP) which are designed for this purpose.

The malware behind the largest mobile botnet to date has evolved.
A vulnerability in the UDP processing code of Cisconbsp;IOS and Cisconbsp;IOS XE Software could allow an unauthenticated, remote attacker to cause the input queue of an affected system to hold UDP packets, causing an interface qu...
F5 Labs has detected a WireX variant capable of launching UDP flood DDoS attacks.
Microsoft Windows automatically executes code specified in shortcut(LNK)files.
Sigh ... people just leave it on without blocking the port world+dog knows it uses.
So patch it or close it, people A 60 byte payload sent to a UDP socket to the rpcbind service can crash its host by filling up the target's memory.…
A vulnerability in the Session Initiation Protocol (SIP) UDP throttling process of Cisco Unified Communications Manager (Cisco Unified CM) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) cond...
A long-fixed bug in how Android and Linux handles UDP network connections has caused a lot of unnecessary worry.
Ping of pwn: Malicious UDP packets may take over gear A Linux kernel flaw that potentially allows miscreants to remotely control vulnerable servers, desktops, IoT gear, Android handhelds, and more, has been quietly patched.…
Almost anyone can fall victim to a DDoS attack.

They are relatively cheap and easy to organize, and can be highly effective if reliable protection is not in place.

Based on analysis of the data obtained from open sources, we managed to find out the current cost of a DDoS attack on the black market. We also established what exactly the cybercriminals behind DDoS attacks offer their customers.
Nginx has upgraded its web server and load balancer to take advantage of its JavaScript implementation. The company on Tuesday debuts Nginx Plus R12, the commercially supported version of its technology.

This release moves NginScript, a JavaScript-...
Microsoft Windows contains a memory corruption bug in the handling of SMB traffic,which may allow a remote,unauthenticated attacker to cause a denial of service on a vulnerable system.