CAPEC-295 - ICMP Timestamp Request

An attacker sends an ICMP type 13 Timestamp Request to determine the time as recorded by a remote target. Timestamp Replies, ICMP Type 14, usually return a value in Greenwich Mean Time. An attacker can attempt to use an ICMP Timestamp requests to 'ping' a remote system to see if is alive. An attacker may be able to use the timestamp returned from the target to attack time-based security algorithms, such as random number generators, or time-based authentication mechanisms. Additionally, because these types of messages are rare they are easily spotted by intrusion detection systems. Many ICMP scanning tools support IP spoofing to help conceal the origin of the actual request among a storm of similar ICMP messages. It is a common practice for border firewalls and gateways to be configured to block ingress ICMP type 13 and egress ICMP type 14 messages.






  • Scopes 1
  • "Varies by context"
  • Confidentiality

The ability to send an ICMP type 13 query (Timestamp Request) to a remote target and receive an ICMP type 14 message (Timestamp Reply) in response.

The ability to send custom ICMP queries. This can be accomplished via the use of various scanners or utilities.