/
redhat.go
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/
redhat.go
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package redhat
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"log"
"path/filepath"
"strconv"
"strings"
"github.com/sizocompany/sizo-db/pkg/types"
bolt "go.etcd.io/bbolt"
"golang.org/x/xerrors"
"github.com/sizocompany/sizo-db/pkg/db"
"github.com/sizocompany/sizo-db/pkg/utils"
"github.com/sizocompany/sizo-db/pkg/vulnsrc/vulnerability"
)
const (
redhatDir = "redhat"
platformFormat = "Red Hat Enterprise Linux %s"
)
var (
targetPlatforms = []string{"Red Hat Enterprise Linux 5", "Red Hat Enterprise Linux 6",
"Red Hat Enterprise Linux 7", "Red Hat Enterprise Linux 8"}
targetStatus = []string{"Affected", "Fix deferred", "Will not fix", "Out of support scope"}
)
type VulnSrc struct {
dbc db.Operation
}
func NewVulnSrc() VulnSrc {
return VulnSrc{
dbc: db.Config{},
}
}
func (vs VulnSrc) Name() string {
return vulnerability.RedHat
}
func (vs VulnSrc) Update(dir string) error {
rootDir := filepath.Join(dir, "vuln-list", redhatDir)
var cves []RedhatCVE
err := utils.FileWalk(rootDir, func(r io.Reader, _ string) error {
content, err := ioutil.ReadAll(r)
if err != nil {
return err
}
cve := RedhatCVE{}
if err = json.Unmarshal(content, &cve); err != nil {
return xerrors.Errorf("failed to decode RedHat JSON: %w", err)
}
switch cve.TempAffectedRelease.(type) {
case []interface{}:
var ar RedhatCVEAffectedReleaseArray
if err = json.Unmarshal(content, &ar); err != nil {
return xerrors.Errorf("unknown affected_release type: %w", err)
}
cve.AffectedRelease = ar.AffectedRelease
case map[string]interface{}:
var ar RedhatCVEAffectedReleaseObject
if err = json.Unmarshal(content, &ar); err != nil {
return xerrors.Errorf("unknown affected_release type: %w", err)
}
cve.AffectedRelease = []RedhatAffectedRelease{ar.AffectedRelease}
case nil:
default:
return xerrors.New("unknown affected_release type")
}
switch cve.TempPackageState.(type) {
case []interface{}:
var ps RedhatCVEPackageStateArray
if err = json.Unmarshal(content, &ps); err != nil {
return xerrors.Errorf("unknown package_state type: %w", err)
}
cve.PackageState = ps.PackageState
case map[string]interface{}:
var ps RedhatCVEPackageStateObject
if err = json.Unmarshal(content, &ps); err != nil {
return xerrors.Errorf("unknown package_state type: %w", err)
}
cve.PackageState = []RedhatPackageState{ps.PackageState}
case nil:
default:
return xerrors.New("unknown package_state type")
}
cves = append(cves, cve)
return nil
})
if err != nil {
return xerrors.Errorf("error in Red Hat walk: %w", err)
}
if err = vs.save(cves); err != nil {
return xerrors.Errorf("error in Red Hat save: %w", err)
}
return nil
}
func (vs VulnSrc) save(cves []RedhatCVE) error {
log.Println("Saving Red Hat DB")
err := vs.dbc.BatchUpdate(func(tx *bolt.Tx) error {
return vs.commit(tx, cves)
})
if err != nil {
return xerrors.Errorf("failed batch update: %w", err)
}
return nil
}
func (vs VulnSrc) commit(tx *bolt.Tx, cves []RedhatCVE) error {
for _, cve := range cves {
if err := vs.putAdvisoryDetail(tx, cve); err != nil {
return err
}
if err := vs.putVulnerabilityDetail(tx, cve); err != nil {
return err
}
}
return nil
}
func (vs VulnSrc) putAdvisoryDetail(tx *bolt.Tx, cve RedhatCVE) error {
// OVAL v2 contains unpatched vulnerabilities as well, so this process is usually unnecessary.
// But OVAL v2 is missing some unpatched vulnerabilities and Security Data API should be used for now.
for _, pkgState := range cve.PackageState {
// Add modular namespace: nodejs:12/npm => nodejs:12::npm
pkgName := strings.ReplaceAll(pkgState.PackageName, "/", "::")
if pkgName == "" {
continue
}
// e.g. Red Hat Enterprise Linux 7
platformName := pkgState.ProductName
if !utils.StringInSlice(platformName, targetPlatforms) {
continue
}
if !utils.StringInSlice(pkgState.FixState, targetStatus) {
continue
}
advisory := types.Advisory{
// It means this vulnerability affects all versions
FixedVersion: "",
}
if err := vs.dbc.PutAdvisoryDetail(tx, cve.Name, platformName, pkgName, advisory); err != nil {
return xerrors.Errorf("failed to save Red Hat advisory: %w", err)
}
}
return nil
}
func (vs VulnSrc) putVulnerabilityDetail(tx *bolt.Tx, cve RedhatCVE) error {
cvssScore, _ := strconv.ParseFloat(cve.Cvss.CvssBaseScore, 64)
cvss3Score, _ := strconv.ParseFloat(cve.Cvss3.Cvss3BaseScore, 64)
title := strings.TrimPrefix(strings.TrimSpace(cve.Bugzilla.Description), cve.Name)
vuln := types.VulnerabilityDetail{
CvssScore: cvssScore,
CvssVector: cve.Cvss.CvssScoringVector,
CvssScoreV3: cvss3Score,
CvssVectorV3: cve.Cvss3.Cvss3ScoringVector,
Severity: severityFromThreat(cve.ThreatSeverity),
References: cve.References,
Title: strings.TrimSpace(title),
Description: strings.TrimSpace(strings.Join(cve.Details, "")),
}
if err := vs.dbc.PutVulnerabilityDetail(tx, cve.Name, vulnerability.RedHat, vuln); err != nil {
return xerrors.Errorf("failed to save Red Hat vulnerability: %w", err)
}
// for light DB
if err := vs.dbc.PutSeverity(tx, cve.Name, types.SeverityUnknown); err != nil {
return xerrors.Errorf("failed to save Red Hat vulnerability severity: %w", err)
}
return nil
}
func (vs VulnSrc) Get(majorVersion string, pkgName string) ([]types.Advisory, error) {
bucket := fmt.Sprintf(platformFormat, majorVersion)
advisories, err := vs.dbc.GetAdvisories(bucket, pkgName)
if err != nil {
return nil, xerrors.Errorf("failed to get Red Hat advisories: %w", err)
}
return advisories, nil
}
func severityFromThreat(sev string) types.Severity {
switch strings.Title(sev) {
case "Low":
return types.SeverityLow
case "Moderate":
return types.SeverityMedium
case "Important":
return types.SeverityHigh
case "Critical":
return types.SeverityCritical
}
return types.SeverityUnknown
}