![]() Applications patched by IntPatch have a negligible runtime performance loss which is averaging about 1%. ![]() It has caught all 46 previously known IO2BO vulnerabilities in our test suite and found 21 new bugs. We evaluate IntPatch on a number of real-world applications. Moreover, IntPatch provides an interface for programmers to facilitate checking integer overflows. ![]() IntPatch utilizes classic type theory and dataflow analysis framework to identify potential IO2BO vulnerabilities, and then instruments programs with runtime checks. This class of attacks makes use of unsafe functions (usually in C or C++) that allow writing of arbitrary content outside a designated area of memory. However, in some scenarios, an integer overflow. Prelim buffer overflows Before we discuss stack canaries, we must first introduce buffer overflows. In this paper, we present the design and implementation of IntPatch, a compiler extension for automatically fixing IO2BO vulnerabilities in C/C++ programs at compile time. Most integer overflow conditions can lead to inaccurate program behavior without causing any vulnerabilities. Automatically identifying and fixing this kind of vulnerability are critical for software security. The Integer-Overflow-to-Buffer-Overflow (IO2BO) vulnerability is an underestimated threat. A buffer overflow is dangerous when the vulnerable binary or program is a setuid binary, If you don’t know what setuid binaries are, read the provided link, but in general They are programs that run with capabilities of another user (usually root), But when that program is vulnerable to a buffer overflow it’s not a good thing anymore. A successful buffer overflow, innocuous or not, damages a computer’s permanent memory. Technically, when an adder/subtractor circuit is utilizing signed (+/-) arithmetic &, if there’s arithmetic overflow, the most significant magnitude bit into the sign bit will be overflowed. Chao Zhang, Tielei Wang, Tao Wei, Yu Chen, and Wei Zou Buffer overflows and SQL Injection have plagued programmers for many years.
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