fix: improve iptables checker

Update iptables checker to avoid returning a false positive with the
following string:

0.0.0.0
iptables -t nat -D

Signed-off-by: Fabrice Fontaine <[email protected]>

Author: ffontaine

cve_bin_tool/checkers/iptables.py

@@ -17,7 +17,7 @@ class IptablesChecker(Checker):
     CONTAINS_PATTERNS: list[str] = []
     FILENAME_PATTERNS: list[str] = []
     VERSION_PATTERNS = [
-        r"\r?\n([0-9]{1,2}\.[0-9]+\.[0-9]+\.?[0-9]*)\r?\niptables",
+        r"\r?\n([1-9]{1,2}\.[0-9]+\.[0-9]+\.?[0-9]*)\r?\niptables",
         r"iptables-([0-9]+\.[0-9]+\.[0-9]+\.?[0-9]*)",
         r"iptables-rules>[a-zA-Z %:\r\n]*([0-9]+\.[0-9]+\.[0-9]+\.?[0-9]*)",
         r"iptables-save v%s on %s\r?\n([0-9]+\.[0-9]+\.[0-9]+\.?[0-9]*)",