Make read_version_from_raw() more robust

Ignore the "parsed" Linux kernel version information if there are non-ASCII at the beginning of the selected buffer. Fixes projg2#27. Signed-off-by: Florian Schmaus <[email protected]>
Flowdalic · Oct 12, 2023 · c5824c7 · c5824c7
1 parent 53eadd0
commit c5824c7
Showing 1 changed file with 5 additions and 0 deletions.
diff --git a/ecleankernel/file.py b/ecleankernel/file.py
@@ -213,6 +213,11 @@ def read_version_from_raw(self,
             return None
         pos += len(ver_start)
         sbuf = b[pos:pos + 0x100]
+        # Ignore the version information if there are non-ASCII
+        # characters at the beginning.
+        for byte in sbuf[:7]:
+            if byte < 40 or byte > 176:
+                return None
         return sbuf
 
     def read_version_from_efi(self,