Diaphora
Open source program diffing tool that compares binary function sets to find patched vulnerabilities.
Technical Architecture & Overview
Diaphora diffs two versions of a compiled program by comparing function-level features such as structure, call patterns, and pseudo-code. It runs as an IDA plugin and can also consume BinExport databases produced from Ghidra. Analysts use it for patch diffing, where the changed functions in a vendor update point at the vulnerability being fixed. The project has been maintained since 2015 and is actively developed.
Targeted Technical Use Cases
Identifying which functions changed between two firmware or software versions during patch analysis.
Evaluation & Trade-offs
Core Strengths
- +Free alternative to commercial bindiffing workflows.
- +Works with both IDA and Ghidra exports.
- +Best-match heuristics handle recompiled and reordered functions.
Trade-Offs & Limitations
- -Analysis of large binaries can take hours.
- -Result quality depends on the disassembler databases it is given.
Defensive Security Application
Patch analysis to understand exploited vulnerabilities quickly and build targeted detections before vendors publish details.
Frequently Asked Questions
What is Diaphora?→
Diaphora diffs two versions of a compiled program by comparing function-level features such as structure, call patterns, and pseudo-code. It runs as an IDA plugin and can also consume BinExport databases produced from Ghidra. Analysts use it for patch diffing, where the changed functions in a vendor update point at the vulnerability being fixed. The project has been maintained since 2015 and is actively developed.
What is Diaphora used for?→
Identifying which functions changed between two firmware or software versions during patch analysis.
What are the strengths of Diaphora?→
- +Free alternative to commercial bindiffing workflows.
- +Works with both IDA and Ghidra exports.
- +Best-match heuristics handle recompiled and reordered functions.
What are the limitations of Diaphora?→
- +Analysis of large binaries can take hours.
- +Result quality depends on the disassembler databases it is given.
How is Diaphora used defensively?→
Patch analysis to understand exploited vulnerabilities quickly and build targeted detections before vendors publish details.