fix: Support zlib versions with major.minor version number only

zlib has a version 1.3 (without a revision), so make the third digit in the version number optional.

Author: qmfrederik

cve_bin_tool/checkers/zlib.py

@@ -26,9 +26,9 @@ class ZlibChecker(Checker):
     ]
     FILENAME_PATTERNS = [r"libz.so."]
     VERSION_PATTERNS = [
-        r"deflate ([01]+\.[0-9]+\.[0-9]+) ",
-        r"inflate ([01]+\.[0-9]+\.[0-9]+) ",
-        r"libz.so.([01]+\.[0-9]+\.[0-9]+)",  # patterns like this aren't ideal
+        r"deflate ([01]+\.[0-9]+(?:\.[0-9])?) ",
+        r"inflate ([01]+\.[0-9]+(?:\.[0-9])?) ",
+        r"libz.so.([01]+\.[0-9]+(?:\.[0-9])?)",  # patterns like this aren't ideal
     ]
     VENDOR_PRODUCT = [("gnu", "zlib"), ("zlib", "zlib")]
 

test/test_data/zlib.py

@@ -6,6 +6,11 @@
         "product": "zlib",
         "version": "1.2.2",
         "version_strings": ["deflate 1.2.2 Copyright 1995-2005 Jean-loup Gailly"],
+    },
+    {
+        "product": "zlib",
+        "version": "1.3",
+        "version_strings": ["deflate 1.3 Copyright 1995-2023 Jean-loup Gailly and Mark Adler"],
     }
 ]
 package_test_data = [
@@ -27,4 +32,10 @@
         "product": "zlib",
         "version": "1.2.8",
     },
+    {
+        "url": "https://ftp.nluug.nl/pub/os/windows/msys2/builds/mingw/mingw64/",
+        "package_name": "mingw-w64-x86_64-zlib-1.3-1-any.pkg.tar.zst",
+        "product": "zlib",
+        "version": "1.3",
+    },
 ]