99 lines
2.8 KiB
Go
99 lines
2.8 KiB
Go
// Copyright 2017 clair authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package nvd
|
|
|
|
import (
|
|
"fmt"
|
|
"strings"
|
|
|
|
log "github.com/sirupsen/logrus"
|
|
)
|
|
|
|
type nvd struct {
|
|
Entries []nvdEntry `xml:"entry"`
|
|
}
|
|
|
|
type nvdEntry struct {
|
|
Name string `xml:"http://scap.nist.gov/schema/vulnerability/0.4 cve-id"`
|
|
CVSS nvdCVSS `xml:"http://scap.nist.gov/schema/vulnerability/0.4 cvss"`
|
|
}
|
|
|
|
type nvdCVSS struct {
|
|
BaseMetrics nvdCVSSBaseMetrics `xml:"http://scap.nist.gov/schema/cvss-v2/0.2 base_metrics"`
|
|
}
|
|
|
|
type nvdCVSSBaseMetrics struct {
|
|
Score float64 `xml:"score"`
|
|
AccessVector string `xml:"access-vector"`
|
|
AccessComplexity string `xml:"access-complexity"`
|
|
Authentication string `xml:"authentication"`
|
|
ConfImpact string `xml:"confidentiality-impact"`
|
|
IntegImpact string `xml:"integrity-impact"`
|
|
AvailImpact string `xml:"avaibility-impact"`
|
|
}
|
|
|
|
var vectorValuesToLetters map[string]string
|
|
|
|
func init() {
|
|
vectorValuesToLetters = make(map[string]string)
|
|
vectorValuesToLetters["NETWORK"] = "N"
|
|
vectorValuesToLetters["ADJACENT_NETWORK"] = "A"
|
|
vectorValuesToLetters["LOCAL"] = "L"
|
|
vectorValuesToLetters["HIGH"] = "H"
|
|
vectorValuesToLetters["MEDIUM"] = "M"
|
|
vectorValuesToLetters["LOW"] = "L"
|
|
vectorValuesToLetters["NONE"] = "N"
|
|
vectorValuesToLetters["SINGLE_INSTANCE"] = "S"
|
|
vectorValuesToLetters["MULTIPLE_INSTANCES"] = "M"
|
|
vectorValuesToLetters["PARTIAL"] = "P"
|
|
vectorValuesToLetters["COMPLETE"] = "C"
|
|
}
|
|
|
|
func (n nvdEntry) Metadata() *NVDMetadata {
|
|
metadata := &NVDMetadata{
|
|
CVSSv2: NVDmetadataCVSSv2{
|
|
Vectors: n.CVSS.BaseMetrics.String(),
|
|
Score: n.CVSS.BaseMetrics.Score,
|
|
},
|
|
}
|
|
|
|
if metadata.CVSSv2.Vectors == "" {
|
|
return nil
|
|
}
|
|
return metadata
|
|
}
|
|
|
|
func (n nvdCVSSBaseMetrics) String() string {
|
|
var str string
|
|
addVec(&str, "AV", n.AccessVector)
|
|
addVec(&str, "AC", n.AccessComplexity)
|
|
addVec(&str, "Au", n.Authentication)
|
|
addVec(&str, "C", n.ConfImpact)
|
|
addVec(&str, "I", n.IntegImpact)
|
|
addVec(&str, "A", n.AvailImpact)
|
|
str = strings.TrimSuffix(str, "/")
|
|
return str
|
|
}
|
|
|
|
func addVec(str *string, vec, val string) {
|
|
if val != "" {
|
|
if let, ok := vectorValuesToLetters[val]; ok {
|
|
*str = fmt.Sprintf("%s%s:%s/", *str, vec, let)
|
|
} else {
|
|
log.WithFields(log.Fields{"value": val, "vector": vec}).Warning("unknown value for CVSSv2 vector")
|
|
}
|
|
}
|
|
}
|