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Book Overview & Buying
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Table Of Contents
CEH v10 Certified Ethical Hacker Study Guide
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Simple Network Management Protocol
The Simple Network Management Protocol (SNMP) has been around since the late ’80s, though it has gone through several iterations. The first iteration, version 1(SNMPv1), was introduced in 1988. It continues to be used in spite of being superseded by other versions in the intervening years. SNMPv1 also includes a number of flaws that make it problematic from a security perspective. It is a binary protocol, but there is no encryption supported with it. This means anyone who can obtain the packets being transmitted can decode it easily enough. A second problem is there is very weak authentication. SNMPv1 uses community strings to gain access. You either get read-only access or you get read-write access. There is no granularity beyond that. There is also no concept of users. You provide the appropriate string and you get that level of access. Perhaps worse, though, is the fact that the community strings commonly used are so well known. The string...
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