Callback-url-file-3a-2f-2f-2fhome-2f-2a-2f.aws-2fcredentials 'link' Here
Title: The Danger in Your Debug Log: Why file:///home/*/.aws/credentials is a Red Flag
Section 2: What the attacker gets
- Auth response written directly to well-known credentials file.
- Explicitly block the
file protocol. Your redirect URI validation should only allow https (and http only for localhost debugging).
- Never use wildcards in file paths for callbacks. Whitelists should be exact strings, not glob patterns.
- Update your OAuth library. Many older libraries had default "open redirect" vulnerabilities that allowed
file:// tricks. Modern versions strip non-HTTP schemes by default.
- Rotate your AWS keys. If this log entry appeared from an external source (not your own testing), assume the attacker already tried to read that file. Rotate your
~/.aws/credentials immediately.
Encoded URL: callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials callback-url-file-3A-2F-2F-2Fhome-2F-2A-2F.aws-2Fcredentials
For security best practices, ensure that your .aws/credentials file is not accessible by others (e.g., by setting appropriate file permissions). On Unix-like systems, you can do this by running: Title: The Danger in Your Debug Log: Why file:///home/*/
- Reject callback URLs where scheme != http and scheme != https.
- If allowing localhost or internal callbacks, require explicit admin allowlist entries and tokenized authentication.
- Normalize and decode incoming URL inputs before validation to avoid bypass via percent-encoding.
- Revoke and rotate exposed AWS credentials immediately if compromise is suspected.
- Block outbound traffic to known malicious endpoints at the network perimeter and via egress filtering.
- Disable or remove any untrusted callback URLs or webhooks that accept user-supplied URLs.
- Inspect application logs for occurrences of the encoded string and other file:/// callbacks; isolate affected hosts.
As she navigated through the Eclipse dashboard, her eyes landed on a peculiar entry: file:///home/*/.aws/credentials. Rachel's curiosity was piqued. What could this URL be used for? The file:/// protocol hinted that it was accessing a local file, but the path seemed... unusual. Explicitly block the file protocol