Download VoIP and PBX Security and Forensics: A Practical Approach by Iosif I. Androulidakis PDF

By Iosif I. Androulidakis

This publication starts with an advent to PBXs (Private department Exchanges) and the scene, records and concerned actors. It discusses confidentiality, integrity and availability threats in PBXs. the writer examines the threats and the technical history in addition to defense and forensics regarding PBXs. the aim of this booklet is to elevate person information with reference to protection and privateness threats found in PBXs, assisting either clients and directors shield their platforms. the hot version encompasses a significant replace and extension to the VoIP sections as well as updates to forensics.

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VoIP and PBX Security and Forensics: A Practical Approach

This publication starts with an creation to PBXs (Private department Exchanges) and the scene, data and concerned actors. It discusses confidentiality, integrity and availability threats in PBXs. the writer examines the threats and the technical history in addition to safety and forensics concerning PBXs.

Additional resources for VoIP and PBX Security and Forensics: A Practical Approach

Example text

15 Console status printout as family call numbers. Given the fact that the more important a person in a company the more advanced a phone she has, the attacker could easily find out what are the numbers of these “important” persons judging by the set’s type. CxO’s would possibly have expensive phone sets with many keys and digital displays, while the rest of the employees could have simple analog phones or low end digital phones. 7 The CPU and the Management Port 37 It must be noted at this point that modern systems save the numbers of the speed dialing entries in the PBXs’ memory and databases rather than the phone itself.

In these attacks the fraudster can reuse another party’s credentials to obtain unauthorized access to the services. Technically, VoIP systems can particularly be abused to spoof the caller ID. This is possible both because of the more decentralized and free nature of Internet (compared to Telephony networks) and because of the lack of cross-checking of information across several messages during call setup and throughout the session. As is the case with traditional PBXs, undocumented commands and features left enabled by default are a serious cause of problems.

These tones can however be disabled, set to a very short duration or to a very high or low, inaudible frequency. The users on the other hand rarely are informed about the meaning of these tones, so they might not get alerted. There is also the obvious threat of making calls if the operator has not logged-out or locked the console before leaving. The status of the console is checked in a given brand using the respective commands as shown in Fig. 15. Other special phones not from a technical point of view but rather based on the importance of the user are the phones of executives.

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