debug: T2426: remove invisible characters when printing

1 files changed, 7 insertions, 0 deletions

diff --git a/python/vyos/debug.py b/python/vyos/debug.py
index 1a042cbb4..91431a7bb 100644
--- a/python/vyos/debug.py
+++ b/python/vyos/debug.py
@@ -81,10 +81,17 @@ def enabled(flag):
     return _fromenv(flag) or _fromfile(flag)
 
 
+def _remove_invisible(string):
+    for char in ('\0', '\a', '\b', '\f', '\v'):
+        string = string.replace(char, '')
+    return string
+
+
 def _format(flag, message):
     """
     format a log message
     """
+    message = _remove_invisible(message)
     return f'DEBUG/{flag.upper():<7} {message}\n'