Insufficient Control of Network Message Volume (Network Amplification)

Opis

The product does not sufficiently monitor or control transmitted network traffic volume, so that an actor can cause the product to transmit more traffic than should be allowed for that actor.

In the absence of a policy to restrict asymmetric resource consumption, the application or system cannot distinguish between legitimate transmissions and traffic intended to serve as an amplifying attack on target systems. Systems can often be configured to restrict the amount of traffic sent out on behalf of a client, based on the client's origin or access level. This is usually defined in a resource allocation policy. In the absence of a mechanism to keep track of transmissions, the system or application can be easily abused to transmit asymmetrically greater traffic than the request or client should be permitted to.

Skutki

• Availability

  DoS: Amplification; DoS: Crash, Exit, or Restart; DoS: Resource Consumption (CPU); DoS: Resource Consumption (Memory); DoS: Resource Consumption (Other)

  System resources can be quickly consumed leading to poor application performance or system crash. This may affect network performance and could be used to attack other systems and applications relying on network performance.

Zapobieganie

• Architecture and Design · Separation of Privilege

  An application must make network resources available to a client commensurate with the client's access level.

• Policy

  Define a clear policy for network resource allocation and consumption.

• Implementation

  An application must, at all times, keep track of network resources and meter their usage appropriately.

Przykłady podatności

• CVE-1999-0513 Classic "Smurf" attack, using spoofed ICMP packets to broadcast addresses.
• CVE-1999-1379 DNS query with spoofed source address causes more traffic to be returned to spoofed address than was sent by the attacker.
• CVE-2000-0041 Large datagrams are sent in response to malformed datagrams.
• CVE-1999-1066 Game server sends a large amount.
• CVE-2013-5211 composite: NTP feature generates large responses (high amplification factor) with spoofed UDP source addresses.

Słabość nadrzędna

• CWE-405 Asymmetric Resource Consumption (Amplification)

Kiedy powstaje

• Operation
• Architecture and Design — If the application uses UDP, then it could potentially be subject to spoofing attacks that use the inherent weaknesses of UDP to perform traffic amplification, although this problem can exist in other protocols or contexts.
• Implementation

Dotyczy

Not Language-Specific

Uwagi

This can be resultant from weaknesses that simplify spoofing attacks.

Network amplification, when performed with spoofing, is normally a multi-channel attack from attacker (acting as user) to amplifier, and amplifier to victim.