fix: traefik binary classifier (#4499)

Signed-off-by: Rez Moss <hi@rezmoss.com>

syft/pkg/cataloger/binary/classifier_cataloger_test.go

@@ -227,6 +227,17 @@ func Test_Cataloger_PositiveCases(t *testing.T) {
 				Metadata:  metadata("traefik-binary"),
 			},
 		},
+		{
+			logicalFixture: "traefik/3.6.5/linux-amd64",
+			expected: pkg.Package{
+				Name:      "traefik",
+				Version:   "3.6.5",
+				Type:      "binary",
+				PURL:      "pkg:generic/traefik@3.6.5",
+				Locations: locations("traefik"),
+				Metadata:  metadata("traefik-binary"),
+			},
+		},
 		{
 			logicalFixture: "memcached/1.6.18/linux-amd64",
 			expected: pkg.Package{

syft/pkg/cataloger/binary/classifiers.go

@@ -224,7 +224,7 @@ func DefaultClassifiers() []binutils.Classifier {
 				// [NUL]v1.7.34[NUL]
 				// [NUL]2.9.6[NUL]
 				// 3.0.4[NUL]
-				`(?m)(\x00|\x{FFFD})?v?(?P<version>[0-9]+\.[0-9]+\.[0-9]+(-alpha[0-9]|-beta[0-9]|-rc[0-9])?)\x00`),
+				`(?m)(\x00v?|\x{FFFD}.?)(?P<version>[0-9]+\.[0-9]+\.[0-9]+(-alpha[0-9]|-beta[0-9]|-rc[0-9])?)\x00`),
 			Package: "traefik",
 			PURL:    mustPURL("pkg:generic/traefik@version"),
 			CPEs:    singleCPE("cpe:2.3:a:traefik:traefik:*:*:*:*:*:*:*:*", cpe.NVDDictionaryLookupSource),

syft/pkg/cataloger/binary/test-fixtures/config.yaml

@@ -587,6 +587,13 @@ from-images:
     paths:
       - /usr/local/bin/traefik
 
+  - version: 3.6.5
+    images:
+      - ref: traefik:v3.6.5@sha256:d944e3693bbf5a361ddd2e411bb713049cfb4f5ff3da200b30ee7a347dbd6abd
+        platform: linux/amd64
+    paths:
+      - /usr/local/bin/traefik
+
   # from the original dynamic fixtures...
 
   - name: python-rhel-shared-libs