fix(ghsa): add support of last_known_affected_version_range field

pkg/vulnsrc/ghsa/ghsa.go

@@ -40,7 +40,8 @@ var (
 )
 
 type DatabaseSpecific struct {
-	Severity string `json:"severity"`
+	Severity                      string `json:"severity"`
+	LastKnownAffectedVersionRange string `json:"last_known_affected_version_range"`
 }
 
 type GHSA struct{}
@@ -95,6 +96,12 @@ func (t *transformer) TransformAdvisories(advisories []osv.Advisory, entry osv.E
 
 	severity := convertSeverity(specific.Severity)
 	for i, adv := range advisories {
+		// Parse database_specific
+		if err := parseDatabaseSpecific(adv); err != nil {
+			return nil, xerrors.Errorf("failed to parse database specific: %w", err)
+		}
+
+		// Fill severity from GHSA
 		advisories[i].Severity = severity
 
 		// Replace a git URL with a CocoaPods package name in a Swift vulnerability
@@ -112,6 +119,33 @@ func (t *transformer) TransformAdvisories(advisories []osv.Advisory, entry osv.E
 	return advisories, nil
 }
 
+// parseDatabaseSpecific adds a version from the last_known_affected_version_range field
+// cf. https://github.com/github/advisory-database/issues/470#issuecomment-1998604377
+func parseDatabaseSpecific(advisory osv.Advisory) error {
+	// Skip if the `affected[].database_specific` field doesn't exist
+	if advisory.DatabaseSpecific == nil {
+		return nil
+	}
+
+	var affectedSpecific DatabaseSpecific
+	if err := json.Unmarshal(advisory.DatabaseSpecific, &affectedSpecific); err != nil {
+		return xerrors.Errorf("JSON decode error: %w", err)
+	}
+
+	for i, vulnVersion := range advisory.VulnerableVersions {
+		// The fixed and last_affected fields (which use <, <=, or =) take precedence over
+		// the last_known_affected_version_range field.
+		if strings.Contains(vulnVersion, "<") || strings.HasPrefix(vulnVersion, "=") {
+			continue
+		}
+		// `last_known_affected_version_range` uses `< version` or `<= version` formats (e.g. `< 1.2.3` or `<= 1.2.3`).
+		// Remove spaces to match our format
+		verRange := strings.ReplaceAll(affectedSpecific.LastKnownAffectedVersionRange, " ", "")
+		advisory.VulnerableVersions[i] = fmt.Sprintf("%s, %s", vulnVersion, verRange)
+	}
+	return nil
+}
+
 func convertSeverity(severity string) types.Severity {
 	switch severity {
 	case "LOW":

pkg/vulnsrc/ghsa/ghsa_test.go

@@ -73,6 +73,72 @@ func TestVulnSrc_Update(t *testing.T) {
 					},
 					Value: map[string]interface{}{},
 				},
+				{
+					Key: []string{
+						"data-source",
+						"maven::GitHub Security Advisory Maven",
+					},
+					Value: types.DataSource{
+						ID:   vulnerability.GHSA,
+						Name: "GitHub Security Advisory Maven",
+						URL:  "https://github.com/advisories?query=type%3Areviewed+ecosystem%3Amaven",
+					},
+				},
+				{
+					Key: []string{
+						"advisory-detail",
+						"CVE-2023-25330",
+						"maven::GitHub Security Advisory Maven",
+						"com.baomidou:mybatis-plus",
+					},
+					Value: types.Advisory{
+						VendorIDs: []string{
+							"GHSA-32qq-m9fh-f74w",
+						},
+						VulnerableVersions: []string{">=0, <3.5.3.1"},
+					},
+				},
+				{
+					Key: []string{
+						"advisory-detail",
+						"CVE-2023-25330",
+						"maven::GitHub Security Advisory Maven",
+						"com.baomidou:mybatis-plus-copy",
+					},
+					Value: types.Advisory{
+						VendorIDs: []string{
+							"GHSA-32qq-m9fh-f74w",
+						},
+						PatchedVersions:    []string{"3.5.0"},
+						VulnerableVersions: []string{"<3.5.0"},
+					},
+				},
+				{
+					Key: []string{
+						"vulnerability-detail",
+						"CVE-2023-25330",
+						"ghsa",
+					},
+					Value: types.VulnerabilityDetail{
+						Title:       "MyBatis-Plus vulnerable to SQL injection via TenantPlugin",
+						Description: "MyBatis-Plus below 3.5.3.1 is vulnerable to SQL injection via the tenant ID value. This may allow remote attackers to execute arbitrary SQL commands.",
+						References: []string{
+							"https://nvd.nist.gov/vuln/detail/CVE-2023-25330",
+							"https://github.com/FCncdn/MybatisPlusTenantPluginSQLInjection-POC/blob/master/Readme.en.md",
+							"https://github.com/baomidou/mybatis-plus",
+						},
+						Severity:     types.SeverityCritical,
+						CvssVectorV3: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
+						CvssScoreV3:  9.8,
+					},
+				},
+				{
+					Key: []string{
+						"vulnerability-id",
+						"CVE-2023-25330",
+					},
+					Value: map[string]interface{}{},
+				},
 				{
 					Key: []string{
 						"data-source",

pkg/vulnsrc/ghsa/testdata/happy/ghsa/advisories/github-reviewed/2023/04/GHSA-32qq-m9fh-f74w/GHSA-32qq-m9fh-f74w.json

@@ -0,0 +1,83 @@
+{
+  "schema_version": "1.4.0",
+  "id": "GHSA-32qq-m9fh-f74w",
+  "modified": "2023-04-14T20:31:15Z",
+  "published": "2023-04-05T15:30:24Z",
+  "aliases": [
+    "CVE-2023-25330"
+  ],
+  "summary": "MyBatis-Plus vulnerable to SQL injection via TenantPlugin",
+  "details": "MyBatis-Plus below 3.5.3.1 is vulnerable to SQL injection via the tenant ID value. This may allow remote attackers to execute arbitrary SQL commands.",
+  "severity": [
+    {
+      "type": "CVSS_V3",
+      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
+    }
+  ],
+  "affected": [
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "com.baomidou:mybatis-plus"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "< 3.5.3.1"
+      }
+    },
+    {
+      "package": {
+        "ecosystem": "Maven",
+        "name": "com.baomidou:mybatis-plus-copy"
+      },
+      "ranges": [
+        {
+          "type": "ECOSYSTEM",
+          "events": [
+            {
+              "introduced": "0"
+            },
+            {
+              "fixed": "3.5.0"
+            }
+          ]
+        }
+      ],
+      "database_specific": {
+        "last_known_affected_version_range": "< 3.5.3.1"
+      }
+    }
+  ],
+  "references": [
+    {
+      "type": "ADVISORY",
+      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-25330"
+    },
+    {
+      "type": "WEB",
+      "url": "https://github.com/FCncdn/MybatisPlusTenantPluginSQLInjection-POC/blob/master/Readme.en.md"
+    },
+    {
+      "type": "PACKAGE",
+      "url": "https://github.com/baomidou/mybatis-plus"
+    }
+  ],
+  "database_specific": {
+    "cwe_ids": [
+      "CWE-89"
+    ],
+    "severity": "CRITICAL",
+    "github_reviewed": true,
+    "github_reviewed_at": "2023-04-05T21:13:04Z",
+    "nvd_published_at": "2023-04-05T14:15:00Z"
+  }
+}

pkg/vulnsrc/osv/osv.go

@@ -40,6 +40,9 @@ type Advisory struct {
 	References   []string
 	CVSSScoreV3  float64
 	CVSSVectorV3 string
+
+	// From affected[].database_specific
+	DatabaseSpecific json.RawMessage
 }
 
 type OSV struct {
@@ -252,6 +255,7 @@ func parseAffected(entry Entry, vulnIDs, aliases, references []string) ([]Adviso
 					References:         references,
 					CVSSVectorV3:       cvssVectorV3,
 					CVSSScoreV3:        cvssScoreV3,
+					DatabaseSpecific:   affected.DatabaseSpecific,
 				}
 			}
 		}

pkg/vulnsrc/osv/types.go

@@ -55,6 +55,7 @@ type Affected struct {
 	Ranges            []Range           `json:"ranges,omitempty"`
 	Versions          []string          `json:"versions,omitempty"`
 	EcosystemSpecific EcosystemSpecific `json:"ecosystem_specific"`
+	DatabaseSpecific  json.RawMessage   `json:"database_specific,omitempty"`
 }
 
 type Import struct {