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vulnerability.go
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/
vulnerability.go
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package gobinsec
import (
"reflect"
)
// Vulnerability for a vulnerability
type Vulnerability struct {
ID string // CVE ID
References []string // Reference URL
Matchs []VulnerabilityMatch // version matching
Exposed bool // tells if this vulnerability is exposed
Ignored bool // tells id this vulnerability is ignored
}
// NewVulnerability builds a vulnerability from NVD call result
func NewVulnerability(item Item) (*Vulnerability, error) {
vulnerability := Vulnerability{
ID: item.CVE.Metadata.ID,
}
for _, reference := range item.CVE.References.ReferenceData {
vulnerability.References = append(vulnerability.References, reference.URL)
}
for _, node := range item.Configurations.Nodes {
for _, match := range node.Match {
if match.Vulnerable {
vm, err := NewVulnerabilityMatch(match)
if err != nil {
return nil, err
}
if !vm.InList(vulnerability.Matchs) {
vulnerability.Matchs = append(vulnerability.Matchs, *vm)
}
}
}
}
vulnerability.Ignored = config.IgnoreVulnerability(vulnerability.ID)
return &vulnerability, nil
}
// IsExposed tells if given version matchs vulnerability
func (v *Vulnerability) IsExposed(version Version) bool {
for _, match := range v.Matchs {
if match.Match(version) {
v.Exposed = true
return true
}
}
return false
}
// VulnerabilityMatch are version constraints for vulnerability
type VulnerabilityMatch struct {
VersionStartExcluding Version
VersionStartIncluding Version
VersionEndExcluding Version
VersionEndIncluding Version
}
// NewVulnerabilityMatch return a version match
func NewVulnerabilityMatch(m Match) (*VulnerabilityMatch, error) {
var vm VulnerabilityMatch
if m.VersionStartExcluding != "" {
vm.VersionStartExcluding = NewVersion(m.VersionStartExcluding)
}
if m.VersionStartIncluding != "" {
vm.VersionStartIncluding = NewVersion(m.VersionStartIncluding)
}
if m.VersionEndExcluding != "" {
vm.VersionEndExcluding = NewVersion(m.VersionEndExcluding)
}
if m.VersionEndIncluding != "" {
vm.VersionEndIncluding = NewVersion(m.VersionEndIncluding)
}
return &vm, nil
}
// Match tells if given version matches (so that it is affected by vulnerability)
// nolint:gocyclo // this is life
func (m *VulnerabilityMatch) Match(v Version) bool {
if m.VersionStartExcluding == nil &&
m.VersionStartIncluding == nil &&
m.VersionEndExcluding == nil &&
m.VersionEndIncluding == nil {
return config.Strict
}
if m.VersionStartExcluding != nil {
r, err := m.VersionStartExcluding.Compare(v)
if err != nil {
return true
}
if r >= 0 {
return false
}
}
if m.VersionStartIncluding != nil {
r, err := m.VersionStartIncluding.Compare(v)
if err != nil {
return true
}
if r > 0 {
return false
}
}
if m.VersionEndExcluding != nil {
r, err := m.VersionEndExcluding.Compare(v)
if err != nil {
return true
}
if r <= 0 {
return false
}
}
if m.VersionEndIncluding != nil {
r, err := m.VersionEndIncluding.Compare(v)
if err != nil {
return true
}
if r < 0 {
return false
}
}
return true
}
// InList tells if match in given list
func (m *VulnerabilityMatch) InList(matchs []VulnerabilityMatch) bool {
for _, match := range matchs {
if m.Equal(match) {
return true
}
}
return false
}
// Equal tells if matchs equal
func (m *VulnerabilityMatch) Equal(o VulnerabilityMatch) bool {
return reflect.DeepEqual(*m, o)
}