Add package context in vulnerability details view

Signed-off-by: Tushar Goel <tushar.goel.dav@gmail.com>

vulnerabilities/models.py

@@ -341,28 +341,32 @@ class Meta:
         ordering = ["vulnerability", "reference"]
 
 
-def purl_to_dict(purl: PackageURL):
+def purl_to_dict(purl: PackageURL, without_version=False):
     """
     Return a dict of purl components suitable for use in a queryset.
     We need to have specific empty values for using in querysets because of our peculiar model structure.
 
     For example::
     >>> purl_to_dict(PackageURL.from_string("pkg:generic/postgres"))
-    {'type': 'generic', 'namespace': '', 'name': 'postgres', 'version': '', 'qualifiers': {}, 'subpath': ''}
+    {'type': 'generic', 'namespace': '', 'name': 'postgres', 'qualifiers': {}, 'subpath': '', 'version': ''}
     >>> purl_to_dict(PackageURL.from_string("pkg:generic/postgres/postgres@1.2?foo=bar#baz"))
-    {'type': 'generic', 'namespace': 'postgres', 'name': 'postgres', 'version': '1.2', 'qualifiers': {'foo': 'bar'}, 'subpath': 'baz'}
+    {'type': 'generic', 'namespace': 'postgres', 'name': 'postgres', 'qualifiers': {'foo': 'bar'}, 'subpath': 'baz', 'version': '1.2'}
+    >>> purl_to_dict(purl = PackageURL.from_string("pkg:generic/postgres/postgres@1.2?foo=bar#baz"), without_version=True)
+    {'type': 'generic', 'namespace': 'postgres', 'name': 'postgres', 'qualifiers': {'foo': 'bar'}, 'subpath': 'baz'}
     """
     if isinstance(purl, str):
         purl = PackageURL.from_string(purl)
 
-    return dict(
+    lookup = dict(
         type=purl.type,
         namespace=purl.namespace or "",
         name=purl.name,
-        version=purl.version or "",
         qualifiers=purl.qualifiers or {},
         subpath=purl.subpath or "",
     )
+    if not without_version:
+        lookup["version"] = purl.version or ""
+    return lookup
 
 
 class PackageQuerySet(BaseQuerySet, PackageURLQuerySet):
@@ -416,17 +420,6 @@ def with_vulnerability_counts(self):
             ),
         )
 
-    def fixing_packages(self, package, with_qualifiers_and_subpath=True):
-        """
-        Return a queryset of packages that are fixing the vulnerability of
-        ``package``.
-        """
-
-        return self.match_purl(
-            purl=package.purl,
-            with_qualifiers_and_subpath=with_qualifiers_and_subpath,
-        ).fixing()
-
     def search(self, query=None):
         """
         Return a Package queryset searching for the ``query``.
@@ -481,6 +474,15 @@ def for_cve(self, cve):
         """
         return self.filter(vulnerabilities__vulnerabilityreference__reference_id__exact=cve)
 
+    def matching_packages(self, purl):
+        if not purl:
+            return self
+        if not isinstance(purl, PackageURL):
+            purl = str(purl)
+            purl = PackageURL.from_string(purl)
+        lookups = purl_to_dict(purl=purl, without_version=True)
+        return self.filter(**lookups)
+
 
 def get_purl_query_lookups(purl):
     """
@@ -584,13 +586,6 @@ def fixing(self):
     # legacy aliases
     resolved_to = fixing
 
-    @property
-    def fixed_packages(self):
-        """
-        Return a queryset of packages that are fixed.
-        """
-        return Package.objects.fixing_packages(package=self).distinct()
-
     @property
     def is_vulnerable(self) -> bool:
         """

vulnerabilities/templates/package_details.html

@@ -58,7 +58,7 @@
                         {% for vulnerability in affected_by_vulnerabilities %}
                             <tr>
                                 <td>
-                                    <a href="{{ vulnerability.get_absolute_url }}" target="_self">{{ vulnerability.vulnerability_id }}</a>
+                                    <a href="{{ vulnerability.get_absolute_url }}?package={{package.purl}}" target="_self">{{ vulnerability.vulnerability_id }}</a>
                                 </td>
                                 <td>
                                     {{ vulnerability.summary }}
@@ -105,7 +105,7 @@
                         {% for vulnerability in fixing_vulnerabilities %}
                             <tr>
                                 <td>
-                                    <a href="{{ vulnerability.get_absolute_url }}" target="_self">{{ vulnerability.vulnerability_id }}</a>
+                                    <a href="{{ vulnerability.get_absolute_url }}?package={{package.purl}}" target="_self">{{ vulnerability.vulnerability_id }}</a>
                                 </td>
                                 <td>
                                     {{ vulnerability.summary }}

vulnerabilities/views.py

@@ -18,6 +18,7 @@
 from django.views import generic
 from django.views.generic.detail import DetailView
 from django.views.generic.list import ListView
+from packageurl import PackageURL
 
 from vulnerabilities import models
 from vulnerabilities.forms import ApiUserCreationForm
@@ -116,15 +117,23 @@ def get_queryset(self):
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
+        request_query = self.request.GET
+        package = request_query.get("package")
+        purl = None
+        if package:
+            try:
+                purl = PackageURL.from_string(package)
+            except:
+                purl = None
         context.update(
             {
                 "vulnerability": self.object,
                 "vulnerability_search_form": VulnerabilitySearchForm(self.request.GET),
                 "severities": list(self.object.severities),
                 "references": self.object.references.all(),
                 "aliases": self.object.aliases.all(),
-                "affected_packages": self.object.affected_packages.all(),
-                "fixed_by_packages": self.object.fixed_by_packages.all(),
+                "affected_packages": self.object.affected_packages.matching_packages(purl),
+                "fixed_by_packages": self.object.fixed_by_packages.matching_packages(purl),
                 "weaknesses": self.object.weaknesses.all(),
             }
         )