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🛡️ Sentinel: [HIGH] Fix path traversal in SetPortrait #229

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🛡️ Sentinel: [HIGH] Fix path traversal in SetPortrait #229

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16 changes: 12 additions & 4 deletions src/API/CustomEmployeeManager.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -889,12 +889,20 @@ private static void SetPortrait(Transform card, string employeeId)
var portraitTransform = card.Find("Image");
if (portraitTransform == null) return;

string assetsDir = Path.Combine(MelonEnvironment.UserDataDirectory, "ModAssets");
string? imagePath = null;
foreach (var ext in new[] { ".jpg", ".png" })
// [Security] Prevent path traversal bypasses by validating employeeId before file system operations
if (employeeId.IndexOfAny(Path.GetInvalidFileNameChars()) >= 0 || employeeId.Contains(".."))
{
string candidate = Path.Combine(assetsDir, employeeId + ext);
if (File.Exists(candidate)) { imagePath = candidate; break; }
CrashLog.Log($"[Security] SetPortrait: Path traversal detected in employeeId={employeeId}");
}
else
{
string assetsDir = Path.Combine(MelonEnvironment.UserDataDirectory, "ModAssets");
foreach (var ext in new[] { ".jpg", ".png" })
{
string candidate = Path.Combine(assetsDir, employeeId + ext);
if (File.Exists(candidate)) { imagePath = candidate; break; }
}
}

if (imagePath != null)
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