vulnsrc_rhel: one vulnerability by CVE

Get one vulnerability by CVE_ID for RHEL instead of one by RHSA_ID so we can have NVD metadata added to the vulnerabilities.

Fixes #495

ext/vulnsrc/rhel/rhel.go

@@ -70,6 +70,7 @@ type definition struct {
 type reference struct {
 	Source string `xml:"source,attr"`
 	URI    string `xml:"ref_url,attr"`
+	ID     string `xml:"ref_id,attr"`
 }
 
 type criteria struct {
@@ -198,8 +199,6 @@ func parseRHSA(ovalReader io.Reader) (vulnerabilities []database.VulnerabilityWi
 		if len(pkgs) > 0 {
 			vulnerability := database.VulnerabilityWithAffected{
 				Vulnerability: database.Vulnerability{
-					Name:        name(definition),
-					Link:        link(definition),
 					Severity:    severity(definition),
 					Description: description(definition),
 				},
@@ -207,7 +206,15 @@ func parseRHSA(ovalReader io.Reader) (vulnerabilities []database.VulnerabilityWi
 			for _, p := range pkgs {
 				vulnerability.Affected = append(vulnerability.Affected, p)
 			}
-			vulnerabilities = append(vulnerabilities, vulnerability)
+
+			// One vulnerability by CVE
+			for _, reference := range definition.References {
+				if reference.Source == "CVE" {
+					vulnerability.Name = reference.ID
+					vulnerability.Link = reference.URI
+					vulnerabilities = append(vulnerabilities, vulnerability)
+				}
+			}
 		}
 	}
 
@@ -358,21 +365,6 @@ func description(def definition) (desc string) {
 	return
 }
 
-func name(def definition) string {
-	return strings.TrimSpace(def.Title[:strings.Index(def.Title, ": ")])
-}
-
-func link(def definition) (link string) {
-	for _, reference := range def.References {
-		if reference.Source == "RHSA" {
-			link = reference.URI
-			break
-		}
-	}
-
-	return
-}
-
 func severity(def definition) database.Severity {
 	switch strings.TrimSpace(def.Title[strings.LastIndex(def.Title, "(")+1 : len(def.Title)-1]) {
 	case "Low":

ext/vulnsrc/rhel/rhel_test.go

@@ -33,8 +33,8 @@ func TestRHELParser(t *testing.T) {
 	testFile, _ := os.Open(path + "/testdata/fetcher_rhel_test.1.xml")
 	vulnerabilities, err := parseRHSA(testFile)
 	if assert.Nil(t, err) && assert.Len(t, vulnerabilities, 1) {
-		assert.Equal(t, "RHSA-2015:1193", vulnerabilities[0].Name)
-		assert.Equal(t, "https://rhn.redhat.com/errata/RHSA-2015-1193.html", vulnerabilities[0].Link)
+		assert.Equal(t, "CVE-2015-0252", vulnerabilities[0].Name)
+		assert.Equal(t, "https://access.redhat.com/security/cve/CVE-2015-0252", vulnerabilities[0].Link)
 		assert.Equal(t, database.MediumSeverity, vulnerabilities[0].Severity)
 		assert.Equal(t, `Xerces-C is a validating XML parser written in a portable subset of C++. A flaw was found in the way the Xerces-C XML parser processed certain XML documents. A remote attacker could provide specially crafted XML input that, when parsed by an application using Xerces-C, would cause that application to crash.`, vulnerabilities[0].Description)
 
@@ -76,9 +76,9 @@ func TestRHELParser(t *testing.T) {
 	// Test parsing testdata/fetcher_rhel_test.2.xml
 	testFile, _ = os.Open(path + "/testdata/fetcher_rhel_test.2.xml")
 	vulnerabilities, err = parseRHSA(testFile)
-	if assert.Nil(t, err) && assert.Len(t, vulnerabilities, 1) {
-		assert.Equal(t, "RHSA-2015:1207", vulnerabilities[0].Name)
-		assert.Equal(t, "https://rhn.redhat.com/errata/RHSA-2015-1207.html", vulnerabilities[0].Link)
+	if assert.Nil(t, err) && assert.Len(t, vulnerabilities, 17) {
+		assert.Equal(t, "CVE-2015-2722", vulnerabilities[0].Name)
+		assert.Equal(t, "https://access.redhat.com/security/cve/CVE-2015-2722", vulnerabilities[0].Link)
 		assert.Equal(t, database.CriticalSeverity, vulnerabilities[0].Severity)
 		assert.Equal(t, `Mozilla Firefox is an open source web browser. XULRunner provides the XUL Runtime environment for Mozilla Firefox. Several flaws were found in the processing of malformed web content. A web page containing malicious content could cause Firefox to crash or, potentially, execute arbitrary code with the privileges of the user running Firefox.`, vulnerabilities[0].Description)