Value-Range Analysis of C Programs - Towards Proving the Absence of Buffer Overflow Vulnerabilities (Hardcover, 2008 ed.)

Abu?erover?owoccurswheninputiswrittenintoamemorybu?erthatisnot large enough to hold the input. Bu?er over?ows may allow a malicious person to gain control over a computer system in that a crafted input can trick the defectiveprogramintoexecutingcodethatisencodedintheinputitself.They are recognised as one of the most widespread forms of security vulnerability, and many workarounds, including new processor features, have been proposed to contain the threat. This book describes a static analysis that aims to prove the absence of bu?er over?ows in C programs. The analysis is conservative in the sense that it locates every possible over?ow. Furthermore, it is fully automatic in that it requires no user annotations in the input program. Thekeyideaoftheanalysisistoinferasymbolicstateforeachp- gram point that describes the possible variable valuations that can arise at that point. The program is correct if the inferred values for array indices and pointer o?sets lie within the bounds of the accessed bu?er. The symbolic state consists of a ?nite set of linear inequalities whose feasible points induce a convex polyhedron that represents an approximation to possible variable valuations. The book formally describes how program operations are mapped to operations on polyhedra and details how to limit the analysis to those p- tionsofstructuresandarraysthatarerelevantforveri?cation.Withrespectto operations on string bu?ers, we demonstrate how to analyse C strings whose length is determined by anul character within the string.

General

Imprint:	Springer London
Country of origin:	United Kingdom
Release date:	June 2008
First published:	2008
Authors:	Axel Simon
Dimensions:	235 x 155 x 19mm (L x W x T)
Format:	Hardcover
Pages:	302
Edition:	2008 ed.
ISBN-13:	978-1-84800-016-2
Categories:	Books > Computing & IT > Computer programming > Programming languages > General Promotions
LSN:	1-84800-016-2
Barcode:	9781848000162

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