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When using the Client FS APIs, we check to ensure that reads don't traverse into the allocation's secret dir and private dir. But this check can be bypassed on case-insensitive file systems (ex. Windows, macOS, and Linux with obscure ext4 options enabled). This allows a user with `read-fs` permissions but not `alloc-exec` permissions to read from the secrets dir. This changeset updates the check so that it's case-insensitive. This risks false positives for escape (see linked Go issue), but only if a task without filesystem isolation deliberately writes into the task working directory to do so, which is a fail-safe failure mode. Ref: https://github.com/golang/go/issues/18358 Co-authored-by: dduzgun-security <deniz.duzgun@hashicorp.com>
4 lines
173 B
Plaintext
4 lines
173 B
Plaintext
```release-note:security
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security: Fixed a bug in client FS API where the check to prevent reads from the secrets dir could be bypassed on case-insensitive file systems
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```
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