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Create ~/.aws/credentials at 0o600 (CWE-732 hardening) #944

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Create ~/.aws/credentials at 0o600 (CWE-732 hardening) #944

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7 changes: 6 additions & 1 deletion pkg/cfaws/cred_exporter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -19,7 +19,12 @@ func ExportCredsToProfile(profileName string, creds aws.Credentials) error {
// create it if it doesn't exist
if _, err := os.Stat(credPath); os.IsNotExist(err) {

f, err := os.Create(credPath)
// CWE-732 hardening: create the AWS credentials file with mode
// 0o600 (owner read/write only). os.Create uses umask-default
// (0o644 on standard Linux / macOS installs), which leaves the
// file world-readable. AWS credentials must be 0o600 minimum —
// aws-cli itself creates this file at 0o600.
f, err := os.OpenFile(credPath, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o600)
if err != nil {
return err
}
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