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libEpollFuzzer @ b9bbd2d
libEpollFuzzer @ b9bbd2d
 
 
seed-corpus @ 69f5fd3
seed-corpus @ 69f5fd3
 
 
AsyncEpollHelloWorld.cpp
AsyncEpollHelloWorld.cpp
 
 
AsyncEpollHelloWorld.dict
AsyncEpollHelloWorld.dict
 
 
EpollEchoServer.cpp
EpollEchoServer.cpp
 
 
EpollEchoServer.dict
EpollEchoServer.dict
 
 
EpollEchoServerPubSub.cpp
EpollEchoServerPubSub.cpp
 
 
EpollEchoServerPubSub.dict
EpollEchoServerPubSub.dict
 
 
EpollHelloWorld.cpp
EpollHelloWorld.cpp
 
 
EpollHelloWorld.dict
EpollHelloWorld.dict
 
 
Extensions.cpp
Extensions.cpp
 
 
Http.cpp
Http.cpp
 
 
Makefile
Makefile
 
 
MultipartParser.cpp
MultipartParser.cpp
 
 
PerMessageDeflate.cpp
PerMessageDeflate.cpp
 
 
QueryParser.cpp
QueryParser.cpp
 
 
QueryParser.dict
QueryParser.dict
 
 
README.md
README.md
 
 
TopicTree.cpp
TopicTree.cpp
 
 
TopicTree.dict
TopicTree.dict
 
 
WebSocket.cpp
WebSocket.cpp
 
 
helpers.h
helpers.h
 
 

README.md

Fuzz-testing of various parsers, mocked examples and system libraries

A secure web server must be capable of receiving mass amount of malicious input without misbehaving or performing illegal actions, such as stepping outside of a memory block or otherwise spilling the beans.

Continuous fuzzing under various sanitizers is done as part of the Google OSS-Fuzz project:

  • UndefinedBehaviorSanitizer
  • AddressSanitizer
  • MemorySanitizer

Overall coverage is about 95% for both uSockets and uWebSockets, all source code included

Currently the following parts are individually fuzzed:

  • WebSocket handshake generator
  • WebSocket message parser
  • WebSocket extensions parser & negotiator
  • WebSocket permessage-deflate compression/inflation helper
  • Http parser (with and without Proxy Protocol v2)
  • Http method/url router
  • Pub/sub "topic tree"

While some targets are entire (mocked) example apps

  • libEpollFuzzer mocks the kernel syscalls and allows to cover a lot of uSockets source code.
  • A mock implementation of uSockets allows to cover a lot of the inbetween logic of uWebSockets.