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bulletin.go
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bulletin.go
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package bulletin
import (
"fmt"
"io"
"log"
"net/http"
"github.com/pkg/errors"
"github.com/tealeg/xlsx"
"golang.org/x/exp/maps"
"github.com/vulsio/windows-vuln-feed/pkg/supercedence/model"
"github.com/vulsio/windows-vuln-feed/pkg/supercedence/util"
winkb "github.com/vulsio/windows-vuln-feed/pkg/windows/kb"
winpro "github.com/vulsio/windows-vuln-feed/pkg/windows/product"
)
var (
bulletinURLs = []string{
"https://download.microsoft.com/download/6/7/3/673E4349-1CA5-40B9-8879-095C72D5B49D/BulletinSearch.xlsx",
"https://download.microsoft.com/download/6/7/3/673E4349-1CA5-40B9-8879-095C72D5B49D/BulletinSearch2001-2008.xlsx",
}
)
// FetchandParse ...
func FetchandParse() ([]model.Supercedence, error) {
log.Printf("INFO: fetch Bulletin data feeds. URL: %s", bulletinURLs)
bulletins, err := fetch()
if err != nil {
return nil, errors.Wrap(err, "failed to fetch Bulletin data feeds")
}
supercedences := Parse(bulletins)
log.Printf("INFO: %d Supercedences found", len(supercedences))
return supercedences, nil
}
func fetch() ([]Bulletin, error) {
bulletins := []Bulletin{}
for _, bulletinURL := range bulletinURLs {
req, err := http.NewRequest(http.MethodGet, bulletinURL, nil)
if err != nil {
return nil, errors.Wrap(err, "failed to build request")
}
client := new(http.Client)
resp, err := client.Do(req)
if err != nil {
return nil, errors.Wrap(err, "failed to do request")
}
defer resp.Body.Close()
bs, err := io.ReadAll(resp.Body)
if err != nil {
return nil, errors.Wrap(err, "failed to read response body")
}
f, err := xlsx.OpenBinary(bs)
if err != nil {
return nil, errors.Wrap(err, "failed to open xlsx binary")
}
for _, sheet := range f.Sheets {
for i, row := range sheet.Rows {
// skip header
if i == 0 {
continue
}
var line Bulletin
if err := row.ReadStruct(&line); err != nil {
return nil, errors.Wrap(err, "failed to read xlsx line")
}
bulletins = append(bulletins, line)
}
}
}
return bulletins, nil
}
// Parse ...
func Parse(bulletins []Bulletin) []model.Supercedence {
supercedenceMap := map[string]model.Supercedence{}
for _, bulletin := range bulletins {
if bulletin.Supersedes == "" {
continue
}
name := bulletin.AffectedProduct
if bulletin.AffectedComponent != "" {
if winpro.WinDesktopPattern.MatchString(bulletin.AffectedComponent) || winpro.WinServerPattern.MatchString(bulletin.AffectedComponent) {
name = fmt.Sprintf("%s on %s", bulletin.AffectedProduct, bulletin.AffectedComponent)
} else {
name = fmt.Sprintf("%s on %s", bulletin.AffectedComponent, bulletin.AffectedProduct)
}
}
for _, kbid := range winkb.KBIDPattern.FindAllString(bulletin.Supersedes, -1) {
s := model.Supercedence{
KBID: kbid,
Product: winpro.Format(name),
Supersededby: &model.Supersededby{
KBIDs: []string{bulletin.ComponentKB},
},
}
key := s.Key()
if base, ok := supercedenceMap[key]; ok {
delete(supercedenceMap, key)
s.Supersededby.KBIDs = util.Unique(append(s.Supersededby.KBIDs, base.Supersededby.KBIDs...))
}
supercedenceMap[s.Key()] = s
}
}
return maps.Values(supercedenceMap)
}