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/* Vuls - Vulnerability Scanner
Copyright (C) 2018 Future Corporation , Japan.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package report
import (
"fmt"
"strings"
syslog "github.com/RackSec/srslog"
"golang.org/x/xerrors"
"github.com/future-architect/vuls/config"
"github.com/future-architect/vuls/models"
)
// SyslogWriter send report to syslog
type SyslogWriter struct{}
func (w SyslogWriter) Write(rs ...models.ScanResult) (err error) {
conf := config.Conf.Syslog
facility, _ := conf.GetFacility()
severity, _ := conf.GetSeverity()
raddr := fmt.Sprintf("%s:%s", conf.Host, conf.Port)
sysLog, err := syslog.Dial(conf.Protocol, raddr, severity|facility, conf.Tag)
if err != nil {
return xerrors.Errorf("Failed to initialize syslog client: %w", err)
}
for _, r := range rs {
messages := w.encodeSyslog(r)
for _, m := range messages {
if _, err = fmt.Fprintf(sysLog, m); err != nil {
return err
}
}
}
return nil
}
func (w SyslogWriter) encodeSyslog(result models.ScanResult) (messages []string) {
ipv4Addrs := strings.Join(result.IPv4Addrs, ",")
ipv6Addrs := strings.Join(result.IPv6Addrs, ",")
var commonKvPairs []string
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`scanned_at="%s"`, result.ScannedAt))
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`server_name="%s"`, result.ServerName))
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`os_family="%s"`, result.Family))
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`os_release="%s"`, result.Release))
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`ipv4_addr="%s"`, ipv4Addrs))
commonKvPairs = append(commonKvPairs, fmt.Sprintf(`ipv6_addr="%s"`, ipv6Addrs))
for cveID, vinfo := range result.ScannedCves {
kvPairs := commonKvPairs
var pkgNames []string
for _, pkg := range vinfo.AffectedPackages {
pkgNames = append(pkgNames, pkg.Name)
}
pkgs := strings.Join(pkgNames, ",")
kvPairs = append(kvPairs, fmt.Sprintf(`packages="%s"`, pkgs))
kvPairs = append(kvPairs, fmt.Sprintf(`cve_id="%s"`, cveID))
for _, cvss := range vinfo.Cvss2Scores(result.Family) {
kvPairs = append(kvPairs, fmt.Sprintf(`cvss_score_%s_v2="%.2f"`, cvss.Type, cvss.Value.Score))
kvPairs = append(kvPairs, fmt.Sprintf(`cvss_vector_%s_v2="%s"`, cvss.Type, cvss.Value.Vector))
}
for _, cvss := range vinfo.Cvss3Scores() {
kvPairs = append(kvPairs, fmt.Sprintf(`cvss_score_%s_v3="%.2f"`, cvss.Type, cvss.Value.Score))
kvPairs = append(kvPairs, fmt.Sprintf(`cvss_vector_%s_v3="%s"`, cvss.Type, cvss.Value.Vector))
}
if content, ok := vinfo.CveContents[models.NvdXML]; ok {
cwes := strings.Join(content.CweIDs, ",")
kvPairs = append(kvPairs, fmt.Sprintf(`cwe_ids="%s"`, cwes))
if config.Conf.Syslog.Verbose {
kvPairs = append(kvPairs, fmt.Sprintf(`source_link="%s"`, content.SourceLink))
kvPairs = append(kvPairs, fmt.Sprintf(`summary="%s"`, content.Summary))
}
}
if content, ok := vinfo.CveContents[models.RedHat]; ok {
kvPairs = append(kvPairs, fmt.Sprintf(`title="%s"`, content.Title))
}
// message: key1="value1" key2="value2"...
messages = append(messages, strings.Join(kvPairs, " "))
}
if len(messages) == 0 {
commonKvPairs = append(commonKvPairs, `message="No CVE-IDs are found"`)
messages = append(messages, strings.Join(commonKvPairs, " "))
}
return messages
}
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