David Justamante created PDFBOX-6045:
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Summary: Potential Console Corruption
Key: PDFBOX-6045
URL: https://issues.apache.org/jira/browse/PDFBOX-6045
Project: PDFBox
Issue Type: Bug
Affects Versions: 4.0.0
Reporter: David Justamante
This issue is being *manually* filed by the competition organizers. We
recognize there is a number of AI generated submissions as of late. We have
gone through the manual process of bug/patch validation to prevent unnecessary
"noise", respecting maintainers' time.
This submission is being sent as part of DARPA's AIxCC competition.
(https://aicyberchallenge.com) This issue was discovered and validated by
competition engineers during challenge development. The patch was manually
constructed by the competition engineers.
We found via fuzzing that our console would occasionally get corrupted. This is
caused from not filtering user-generated data during logging (and our choice to
log to the console).
In the first screenshot, you can see the point when the corruption happens. In
the second, you can see the overall outcome.
!https://uploads.linear.app/d7cdd4d4-7aba-4d9d-aa0b-c26b540340f9/1bdf3cc5-031b-465e-bcdd-8bb574ddd4c3/afdd8be8-d6b5-4a5d-bb42-86644b5a387a|width=720,height=77!!https://uploads.linear.app/d7cdd4d4-7aba-4d9d-aa0b-c26b540340f9/48b4d8c4-7072-49dd-af1c-b9f8d9ff6755/f4a75aaa-bcb1-4ad2-ab0b-1586863731c1|width=2009,height=664!
We think the fix is to prevent {{\u001b}} from being written to logs. There may
be other solutions.
The above shows corruption via the font or maybe encoding, but it would be
possible to do other things that could be problematic for users logging to the
console — like turning the text invisible or other things.
Some relevant links:
* [https://gist.github.com/fnky/458719343aabd01cfb17a3a4f7296797]
* [https://www.youtube.com/watch?v=3T2Al3jdY38]
(AIxCC Internal: CHA-1733)
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