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David A. Wheeler: Secure Programming for Linux HOWTO

Jan 09, 2000, 16:05 (1 Talkback[s])
(Other stories by David A. Wheeler)

"This paper provides a set of design and implementation guidelines for writing secure programs for Linux systems. Such programs include application programs used as viewers of remote data, CGI scripts, network servers, and setuid/setgid programs...."

"This paper assumes that the reader understands computer security issues in general, the general security model of Unix-like systems, and the C programming language. This paper does include some information about the Linux programming model for security...."

"This paper first discusses the background of Linux and security. The next section describes the general Linux security model, giving an overview of the security attributes and operations of processes, filesystem objects, and so on. This is followed by the meat of this paper, a set of design and implementation guidelines for developing applications on Linux systems. This is broken into validating all input, avoiding buffer overflows, structuring program internals and approach, carefully calling out to other resources, judiciously sending information back, and finally information on special topics (such as how to acquire random numbers). The paper ends with conclusions and references."

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