fix: validate session replay IDs - #2071
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Prevent path traversal through replay IDs. Replay flushing interpolated contexts.replay.replay_id from the stored crash event into JSON and MP4 paths after only checking for a nonempty string. A crafted ID containing path separators and parent-directory components could select files outside the replay staging directory. Matching JSON/MP4 files could be read, the video uploaded to the configured DSN, and both files deleted. Require a complete 32-digit hexadecimal UUID or its standard hyphenated form before constructing either path. Preserve casing and hyphenation to keep matching staged filenames. The existing UUID parser is unsuitable for validation because it accepts partial IDs and ignores trailing input once it has decoded 16 bytes. The related videoFilename issue allowed an on-disk JSON sidecar to redirect video uploads to arbitrary readable files using absolute paths or traversal components. Current code already derives video filenames from replay_id; document that videoFilename is ignored. Add UUID unit coverage for valid forms, invalid lengths and characters, misplaced hyphens, embedded NULs, and trailing data.
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Codecov Report❌ Patch coverage is Additional details and impacted files@@ Coverage Diff @@
## master #2071 +/- ##
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- Coverage 74.41% 74.22% -0.19%
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Files 103 103
Lines 26746 26761 +15
Branches 4873 4878 +5
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- Hits 19903 19864 -39
- Misses 5487 5556 +69
+ Partials 1356 1341 -15 🚀 New features to boost your workflow:
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Prevent path traversal through replay IDs.
Replay flushing interpolated
contexts.replay.replay_idfrom the stored crash event into JSON and MP4 paths after only checking for a non-empty string. A crafted ID containing path separators and parent-directory components could select files outside the replay staging directory. Matching JSON/MP4 files could be read, the video uploaded to the configured DSN, and both files deleted.Require a complete 32-digit hexadecimal UUID or its standard hyphenated form before constructing either path. Preserve casing and hyphenation to keep matching staged filenames. The existing UUID parser (
sentry__value_as_uuid/sentry_uuid_from_string) is unsuitable for validation because it accepts partial IDs and ignores trailing input once it has decoded 16 bytes.