Accession Number:

AD1095001

Title:

Sound Input Filter Generation for Integer Overflow Errors

Descriptive Note:

Conference Paper

Corporate Author:

Massachusetts Institute of Technology, Computer Science and Artificial Intelligence Lab Cambridge United States

Report Date:

2014-01-22

Pagination or Media Count:

14.0

Abstract:

We present a system, SIFT, for generating input filters that nullify integer overflow errors associated with critical program sites such as memory allocation or block copy sites. SIFT uses a static program analysis to generate filters that discard inputs that may trigger integer overflow errors in the computations of the sizes of allocated memory blocks or the number of copied bytes in block copy operations. Unlike all previous techniques of which we are aware, SIFT is sound -- if an input passes the filter, it will not trigger an integer overflow error at any analyzed site. Our results show that SIFT successfully analyzes and therefore generates sound input filters for 56 out of 58 memory allocation and block memory copy sites in analyzed input processing modules from five applications VLC, Dillo, Swfdec, Swftools, and GIMP. These nullified errors include six known integer overflow vulnerabilities. Our results also show that applying these filters to 62895 real-world inputs produces no false positives. The analysis and filter generation times are all less than a second.

Subject Categories:

  • Computer Systems Management and Standards
  • Cybernetics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE