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vulnerability.go
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vulnerability.go
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package v4
import (
"sort"
"strings"
)
// Vulnerability represents the minimum data fields necessary to perform package-to-vulnerability matching. This can represent a CVE, 3rd party advisory, or any source that relates back to a CVE.
type Vulnerability struct {
ID string `json:"id"` // The identifier of the vulnerability or advisory
PackageName string `json:"package_name"` // The name of the package that is vulnerable
Namespace string `json:"namespace"` // The ecosystem where the package resides
VersionConstraint string `json:"version_constraint"` // The version range which the given package is vulnerable
VersionFormat string `json:"version_format"` // The format which all version fields should be interpreted as
CPEs []string `json:"cpes"` // The CPEs which are considered vulnerable
RelatedVulnerabilities []VulnerabilityReference `json:"related_vulnerabilities"` // Other Vulnerabilities that are related to this one (e.g. GHSA relate to CVEs, or how distro CVE relates to NVD record)
Fix Fix `json:"fix"` // All information about fixed versions
Advisories []Advisory `json:"advisories"` // Any vendor advisories about fixes or other notifications about this vulnerability
}
type VulnerabilityReference struct {
ID string `json:"id"`
Namespace string `json:"namespace"`
}
//nolint:gocognit
func (v *Vulnerability) Equal(vv Vulnerability) bool {
equal := v.ID == vv.ID &&
v.PackageName == vv.PackageName &&
v.Namespace == vv.Namespace &&
v.VersionConstraint == vv.VersionConstraint &&
v.VersionFormat == vv.VersionFormat &&
len(v.CPEs) == len(vv.CPEs) &&
len(v.RelatedVulnerabilities) == len(vv.RelatedVulnerabilities) &&
len(v.Advisories) == len(vv.Advisories) &&
v.Fix.State == vv.Fix.State &&
len(v.Fix.Versions) == len(vv.Fix.Versions)
if !equal {
return false
}
sort.Strings(v.CPEs)
sort.Strings(vv.CPEs)
for idx, cpe := range v.CPEs {
if cpe != vv.CPEs[idx] {
return false
}
}
sortedBaseRelVulns, sortedTargetRelVulns := sortRelatedVulns(v.RelatedVulnerabilities), sortRelatedVulns(vv.RelatedVulnerabilities)
for idx, item := range sortedBaseRelVulns {
if item != sortedTargetRelVulns[idx] {
return false
}
}
sortedBaseAdvisories, sortedTargetAdvisories := sortAdvisories(v.Advisories), sortAdvisories(vv.Advisories)
for idx, item := range sortedBaseAdvisories {
if item != sortedTargetAdvisories[idx] {
return false
}
}
sort.Strings(v.Fix.Versions)
sort.Strings(vv.Fix.Versions)
for idx, item := range v.Fix.Versions {
if item != vv.Fix.Versions[idx] {
return false
}
}
return true
}
func sortRelatedVulns(vulns []VulnerabilityReference) []VulnerabilityReference {
sort.SliceStable(vulns, func(i, j int) bool {
b1, b2 := strings.Builder{}, strings.Builder{}
b1.WriteString(vulns[i].ID)
b1.WriteString(vulns[i].Namespace)
b2.WriteString(vulns[j].ID)
b2.WriteString(vulns[j].Namespace)
return b1.String() < b2.String()
})
return vulns
}
func sortAdvisories(advisories []Advisory) []Advisory {
sort.SliceStable(advisories, func(i, j int) bool {
b1, b2 := strings.Builder{}, strings.Builder{}
b1.WriteString(advisories[i].ID)
b1.WriteString(advisories[i].Link)
b2.WriteString(advisories[j].ID)
b2.WriteString(advisories[j].Link)
return b1.String() < b2.String()
})
return advisories
}