Quarantine bypass and RCE vulnerability in Sketch (proof-of-concept)# CVE-2021-40531

> This proof-of-concept in action.
[Sketch](https://www.sketch.com) is a popular UI/UX design app for macOS. This
post covers a vulnerability in Sketch that I discovered back in July,
CVE-2021-40531. In its simplest form, it is a macOS quarantine bypass, but in
context it can be used for remote code execution.
For more details, see my [blog post](https://jonpalmisc.com/2021/11/22/cve-2021-40531)
for a complete writeup.
## Notes
If you are testing this proof-of-concept locally, be aware that `feed.rss`
expects your web server to be running on port 8080.
[4.0K] /data/pocs/28c69cd000f2a5854bd3bb5815757488015b5c5e
├── [ 627] feed.rss
├── [1.4K] index.html
├── [ 615] payload.terminal
└── [ 657] README.md
0 directories, 4 files