IT Baseline Protection Manual - The Information Warfare Site

Threats Catalogue Deliberate Acts Remarks
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T 5.66 Unauthorised connection of IT systems to a
network
In principle, unauthorised connection of an IT system to an existing network
(by connecting to the existing cables or using the interfaces in the technical
infrastructure rooms or offices) cannot be ruled out. This type of linkage
cannot be prevented with available cable designs, which differ solely in terms
of the time and effort required to connect to the cable and compromise the
data.
The unauthorised integration of a computer into a network is often very
difficult to detect, and usually goes unnoticed. This type of access allows
monitoring of all data communications taking place in the affected segment
and can facilitate the following activities, for example:
- Manipulation of data and software
- Monitoring of lines
- Manipulation of lines
- Replay of messages
- Masquerading
- Analysis of message flow
- Denial of services
- Unauthorised execution of network management functions
- Unauthorised access to active network components
.
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IT-Baseline Protection Manual: Oktober 2000