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feat: prefer known CPE vendors over other candidates (#1294)

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* feat: prefer known CPE vendors over other candidates

All ASF projects will be under the `apache` vendor in CPE, and
indeed this is already one of the candidates, but the logic
for selecting the 'most specific' CPE string would select for
example `apache_software_foundation` or `commons-text`.

This is not necessarily 'wrong' in the CPE candidate selection
logic: there is no way to reliably determine the right candidate.
I think it makes sense to use specific data around the vendor
candidate generation, somewhat similar to
'defaultCandidateAdditions'.

Unfortunately there are still a few CVE's for old (pre-5.x,
long unsupported) tomcat versions that are actually tagged with
`apache_software_foundation`, but I'm not sure those are worth
spending time on.

Signed-off-by: Arnout Engelen <arnout@bzzt.net>

* chore: swap out array of vendors for set data structure

Signed-off-by: Alex Goodman <alex.goodman@anchore.com>

Signed-off-by: Arnout Engelen <arnout@bzzt.net>
Signed-off-by: Alex Goodman <alex.goodman@anchore.com>
Co-authored-by: Alex Goodman <alex.goodman@anchore.com>
This commit is contained in:
Arnout Engelen 2023-01-12 20:16:53 +01:00 committed by GitHub
parent 44e8ae2577
commit a864dc9505
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 16 additions and 29 deletions
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16
syft/pkg/cataloger/common/cpe/generate.go
View File

@ -8,12 +8,17 @@ import (
"strings"
"github.com/facebookincubator/nvdtools/wfn"
"github.com/scylladb/go-set/strset"
"github.com/anchore/syft/internal"
"github.com/anchore/syft/syft/cpe"
"github.com/anchore/syft/syft/pkg"
)
// knownVendors contains vendor strings that are known to exist in
// the CPE database, so they will be preferred over other candidates:
var knownVendors = strset.New("apache")
func newCPE(product, vendor, version, targetSW string) *wfn.Attributes {
c := *(wfn.NewAttributesWithAny())
c.Part = "a"
@ -120,7 +125,16 @@ func candidateVendors(p pkg.Package) []string {
// remove known mis
vendors.removeByValue(findVendorsToRemove(defaultCandidateRemovals, p.Type, p.Name)...)
return vendors.uniqueValues()
uniqueVendors := vendors.uniqueValues()
// if any known vendor was detected, pick that one.
for _, vendor := range uniqueVendors {
if knownVendors.Has(vendor) {
return []string{vendor}
}
}
return uniqueVendors
}
func candidateProducts(p pkg.Package) []string {

29
syft/pkg/cataloger/common/cpe/generate_test.go
View File

@ -279,36 +279,9 @@ func TestGeneratePackageCPEs(t *testing.T) {
},
},
expected: []string{
"cpe:2.3:a:apache-software-foundation:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache-software-foundation:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache-software-foundation:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache_software_foundation:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache_software_foundation:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:apache_software_foundation:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings-xml:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings-xml:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings-xml:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt-bindings:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf-rt:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings_xml:cxf-rt-bindings-xml:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings_xml:cxf:3.3.10:*:*:*:*:*:*:*",
"cpe:2.3:a:cxf_rt_bindings_xml:cxf_rt_bindings_xml:3.3.10:*:*:*:*:*:*:*",
},
},
{
@ -838,7 +811,7 @@ func TestCandidateVendor(t *testing.T) {
Name: "log4j",
Type: pkg.JavaPkg,
},
expected: []string{"apache" /* <-- known good names | default guess --> */, "log4j"},
expected: []string{"apache"},
},
}