fix: support traefik binary from the official Docker image (#2484)

Signed-off-by: Laurent Goderre <laurent.goderre@docker.com>

syft/pkg/cataloger/binary/cataloger_test.go

@@ -133,6 +133,17 @@ func Test_Cataloger_PositiveCases(t *testing.T) {
 				Metadata:  metadata("traefik-binary"),
 			},
 		},
+		{
+			logicalFixture: "traefik/2.10.7/linux-amd64",
+			expected: pkg.Package{
+				Name:      "traefik",
+				Version:   "2.10.7",
+				Type:      "binary",
+				PURL:      "pkg:generic/traefik@2.10.7",
+				Locations: locations("traefik"),
+				Metadata:  metadata("traefik-binary"),
+			},
+		},
 		{
 			logicalFixture: "memcached/1.6.18/linux-amd64",
 			expected: pkg.Package{

syft/pkg/cataloger/binary/default_classifiers.go

@@ -214,7 +214,7 @@ func DefaultClassifiers() []Classifier {
 			EvidenceMatcher: FileContentsVersionMatcher(
 				// [NUL]v1.7.34[NUL]
 				// [NUL]2.9.6[NUL]
-				`(?m)\x00v?(?P<version>[0-9]+\.[0-9]+\.[0-9]+(-alpha[0-9]|-beta[0-9]|-rc[0-9])?)\x00`),
+				`(?m)(\x00|\x{FFFD})v?(?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"),
 		},

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

@@ -329,6 +329,13 @@ from-images:
     paths:
       - /usr/local/bin/traefik
 
+  - version: 2.10.7
+    images:
+      - ref: traefik:2.10.7@sha256:a98415716a91066ef5e442969887ebb3df7d80775b5bfa7b67fcaed989833d84
+        platform: linux/amd64
+    paths:
+      - /usr/local/bin/traefik
+
 
   # from the original dynamic fixtures...