352 lines
10 KiB
Go
352 lines
10 KiB
Go
/* Vuls - Vulnerability Scanner
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Copyright (C) 2016 Future Corporation , Japan.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package oval
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import (
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"fmt"
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"github.com/future-architect/vuls/config"
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"github.com/future-architect/vuls/models"
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"github.com/future-architect/vuls/util"
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"github.com/kotakanbe/goval-dictionary/db"
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ovalmodels "github.com/kotakanbe/goval-dictionary/models"
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)
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// DebianBase is the base struct of Debian and Ubuntu
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type DebianBase struct {
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Base
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}
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func (o DebianBase) update(r *models.ScanResult, defPacks defPacks) {
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ovalContent := *o.convertToModel(&defPacks.def)
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ovalContent.Type = models.NewCveContentType(o.family)
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vinfo, ok := r.ScannedCves[defPacks.def.Debian.CveID]
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if !ok {
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util.Log.Debugf("%s is newly detected by OVAL", defPacks.def.Debian.CveID)
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vinfo = models.VulnInfo{
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CveID: defPacks.def.Debian.CveID,
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Confidences: []models.Confidence{models.OvalMatch},
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CveContents: models.NewCveContents(ovalContent),
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}
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} else {
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cveContents := vinfo.CveContents
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ctype := models.NewCveContentType(o.family)
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if _, ok := vinfo.CveContents[ctype]; ok {
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util.Log.Debugf("%s OVAL will be overwritten",
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defPacks.def.Debian.CveID)
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} else {
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util.Log.Debugf("%s is also detected by OVAL",
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defPacks.def.Debian.CveID)
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cveContents = models.CveContents{}
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}
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vinfo.Confidences.AppendIfMissing(models.OvalMatch)
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cveContents[ctype] = ovalContent
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vinfo.CveContents = cveContents
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}
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// uniq(vinfo.PackNames + defPacks.actuallyAffectedPackNames)
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for _, pack := range vinfo.AffectedPackages {
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defPacks.actuallyAffectedPackNames[pack.Name] = pack.NotFixedYet
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}
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// update notFixedYet of SrcPackage
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for binName := range defPacks.actuallyAffectedPackNames {
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if srcPack, ok := r.SrcPackages.FindByBinName(binName); ok {
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for _, p := range defPacks.def.AffectedPacks {
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if p.Name == srcPack.Name {
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defPacks.actuallyAffectedPackNames[binName] = p.NotFixedYet
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}
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}
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}
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}
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vinfo.AffectedPackages = defPacks.toPackStatuses()
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vinfo.AffectedPackages.Sort()
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r.ScannedCves[defPacks.def.Debian.CveID] = vinfo
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}
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func (o DebianBase) convertToModel(def *ovalmodels.Definition) *models.CveContent {
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var refs []models.Reference
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for _, r := range def.References {
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refs = append(refs, models.Reference{
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Link: r.RefURL,
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Source: r.Source,
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RefID: r.RefID,
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})
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}
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return &models.CveContent{
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CveID: def.Debian.CveID,
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Title: def.Title,
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Summary: def.Description,
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Cvss2Severity: def.Advisory.Severity,
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References: refs,
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}
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}
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// Debian is the interface for Debian OVAL
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type Debian struct {
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DebianBase
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}
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// NewDebian creates OVAL client for Debian
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func NewDebian() Debian {
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return Debian{
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DebianBase{
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Base{
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family: config.Debian,
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},
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},
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}
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}
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// FillWithOval returns scan result after updating CVE info by OVAL
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func (o Debian) FillWithOval(driver db.DB, r *models.ScanResult) (nCVEs int, err error) {
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//Debian's uname gives both of kernel release(uname -r), version(kernel-image version)
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linuxImage := "linux-image-" + r.RunningKernel.Release
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// Add linux and set the version of running kernel to search OVAL.
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if r.Container.ContainerID == "" {
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newVer := ""
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if p, ok := r.Packages[linuxImage]; ok {
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newVer = p.NewVersion
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}
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r.Packages["linux"] = models.Package{
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Name: "linux",
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Version: r.RunningKernel.Version,
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NewVersion: newVer,
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}
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}
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var relatedDefs ovalResult
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if config.Conf.OvalDict.IsFetchViaHTTP() {
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if relatedDefs, err = getDefsByPackNameViaHTTP(r); err != nil {
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return 0, err
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}
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} else {
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if relatedDefs, err = getDefsByPackNameFromOvalDB(driver, r); err != nil {
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return 0, err
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}
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}
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delete(r.Packages, "linux")
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for _, defPacks := range relatedDefs.entries {
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// Remove "linux" added above for oval search
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// linux is not a real package name (key of affected packages in OVAL)
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if notFixedYet, ok := defPacks.actuallyAffectedPackNames["linux"]; ok {
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defPacks.actuallyAffectedPackNames[linuxImage] = notFixedYet
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delete(defPacks.actuallyAffectedPackNames, "linux")
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for i, p := range defPacks.def.AffectedPacks {
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if p.Name == "linux" {
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p.Name = linuxImage
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defPacks.def.AffectedPacks[i] = p
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}
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}
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}
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o.update(r, defPacks)
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}
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for _, vuln := range r.ScannedCves {
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if cont, ok := vuln.CveContents[models.Debian]; ok {
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cont.SourceLink = "https://security-tracker.debian.org/tracker/" + cont.CveID
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vuln.CveContents[models.Debian] = cont
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}
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}
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return len(relatedDefs.entries), nil
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}
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// Ubuntu is the interface for Debian OVAL
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type Ubuntu struct {
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DebianBase
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}
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// NewUbuntu creates OVAL client for Debian
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func NewUbuntu() Ubuntu {
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return Ubuntu{
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DebianBase{
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Base{
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family: config.Ubuntu,
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},
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},
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}
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}
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// FillWithOval returns scan result after updating CVE info by OVAL
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func (o Ubuntu) FillWithOval(driver db.DB, r *models.ScanResult) (nCVEs int, err error) {
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switch major(r.Release) {
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case "14":
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kernelNamesInOval := []string{
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"linux",
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"linux-aws",
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"linux-azure",
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"linux-firmware",
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"linux-lts-utopic",
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"linux-lts-vivid",
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"linux-lts-wily",
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"linux-lts-xenial",
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}
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return o.fillWithOval(driver, r, kernelNamesInOval)
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case "16":
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kernelNamesInOval := []string{
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"linux-image-aws",
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"linux-image-aws-hwe",
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"linux-image-azure",
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"linux-image-extra-virtual",
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"linux-image-extra-virtual-lts-utopic",
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"linux-image-extra-virtual-lts-vivid",
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"linux-image-extra-virtual-lts-wily",
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"linux-image-extra-virtual-lts-xenial",
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"linux-image-gcp",
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"linux-image-generic-lpae",
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"linux-image-generic-lpae-hwe-16.04",
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"linux-image-generic-lpae-lts-utopic",
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"linux-image-generic-lpae-lts-vivid",
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"linux-image-generic-lpae-lts-wily",
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"linux-image-generic-lpae-lts-xenial",
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"linux-image-generic-lts-utopic",
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"linux-image-generic-lts-vivid",
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"linux-image-generic-lts-wily",
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"linux-image-generic-lts-xenial",
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"linux-image-gke",
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"linux-image-hwe-generic-trusty",
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"linux-image-hwe-virtual-trusty",
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"linux-image-kvm",
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"linux-image-lowlatency",
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"linux-image-lowlatency-lts-utopic",
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"linux-image-lowlatency-lts-vivid",
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"linux-image-lowlatency-lts-wily",
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}
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return o.fillWithOval(driver, r, kernelNamesInOval)
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case "18":
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kernelNamesInOval := []string{
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"linux-image-aws",
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"linux-image-azure",
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"linux-image-extra-virtual",
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"linux-image-gcp",
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"linux-image-generic-lpae",
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"linux-image-kvm",
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"linux-image-lowlatency",
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"linux-image-oem",
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"linux-image-oracle",
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"linux-image-raspi2",
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"linux-image-snapdragon",
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"linux-image-virtual",
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}
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return o.fillWithOval(driver, r, kernelNamesInOval)
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}
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return 0, fmt.Errorf("Ubuntu %s is not support for now", r.Release)
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}
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func (o Ubuntu) fillWithOval(driver db.DB, r *models.ScanResult, kernelNamesInOval []string) (nCVEs int, err error) {
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// kernel names in OVAL except for linux-image-generic
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linuxImage := "linux-image-" + r.RunningKernel.Release
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runningKernelVersion := ""
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kernelPkgInOVAL := ""
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isOVALKernelPkgAdded := true
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unusedKernels := []models.Package{}
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if r.Container.ContainerID == "" {
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if v, ok := r.Packages[linuxImage]; ok {
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runningKernelVersion = v.Version
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}
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util.Log.Warnf("Unable to detect vulns of running kernel because the version of the runnning kernel is unknown. server: %s",
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r.ServerName)
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// if runningKernelVersion is "", can't detect the vulns of running Kernel
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for _, n := range kernelNamesInOval {
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if p, ok := r.Packages[n]; ok {
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kernelPkgInOVAL = p.Name
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break
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}
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}
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// remove unused kernels from packages to prevent detecting vulns of unused kernel
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for _, n := range kernelNamesInOval {
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if v, ok := r.Packages[n]; ok {
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unusedKernels = append(unusedKernels, v)
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delete(r.Packages, n)
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}
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}
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if kernelPkgInOVAL == "" {
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if r.Release == "14" {
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kernelPkgInOVAL = "linux"
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} else if _, ok := r.Packages["linux-image-generic"]; !ok {
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util.Log.Warnf("The OVAL name of the running kernel image %s is not found. So vulns of linux-image-generic wll be detected. server: %s",
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r.RunningKernel.Version, r.ServerName)
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kernelPkgInOVAL = "linux-image-generic"
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} else {
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isOVALKernelPkgAdded = false
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}
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}
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if runningKernelVersion != "" {
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r.Packages[kernelPkgInOVAL] = models.Package{
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Name: kernelPkgInOVAL,
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Version: runningKernelVersion,
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}
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}
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}
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var relatedDefs ovalResult
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if config.Conf.OvalDict.IsFetchViaHTTP() {
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if relatedDefs, err = getDefsByPackNameViaHTTP(r); err != nil {
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return 0, err
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}
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} else {
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if relatedDefs, err = getDefsByPackNameFromOvalDB(driver, r); err != nil {
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return 0, err
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}
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}
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if isOVALKernelPkgAdded {
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delete(r.Packages, kernelPkgInOVAL)
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}
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for _, p := range unusedKernels {
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r.Packages[p.Name] = p
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}
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for _, defPacks := range relatedDefs.entries {
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// Remove "linux" added above to search for oval
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// "linux" is not a real package name (key of affected packages in OVAL)
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if nfy, ok := defPacks.actuallyAffectedPackNames[kernelPkgInOVAL]; isOVALKernelPkgAdded && ok {
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defPacks.actuallyAffectedPackNames[linuxImage] = nfy
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delete(defPacks.actuallyAffectedPackNames, kernelPkgInOVAL)
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for i, p := range defPacks.def.AffectedPacks {
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if p.Name == kernelPkgInOVAL {
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p.Name = linuxImage
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defPacks.def.AffectedPacks[i] = p
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}
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}
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}
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o.update(r, defPacks)
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}
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for _, vuln := range r.ScannedCves {
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if cont, ok := vuln.CveContents[models.Ubuntu]; ok {
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cont.SourceLink = "http://people.ubuntu.com/~ubuntu-security/cve/" + cont.CveID
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vuln.CveContents[models.Ubuntu] = cont
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}
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}
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return len(relatedDefs.entries), nil
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}
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