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