cve-check: encode affected product/vendor in CVE_STATUS

CVE_STATUS contains assesment of a given CVE, but until now it didn't have
include the affected vendor/product. In the case of a global system include,
that CVE_STATUS was visible in all recipes.

This patch allows encoding of affected product/vendor to each CVE_STATUS
assessment, also for groups. We can then filter them later and use only
CVEs that correspond to the recipe.

This is going to be used in meta/conf/distro/include/cve-extra-exclusions.inc
and similar places.

(From OE-Core rev: abca80a716e92fc18d3085aba1a15f4bac72379c)

Signed-off-by: Marta Rybczynska <marta.rybczynska@syslinbit.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

3 files changed, 48 insertions, 26 deletions

diff --git a/meta/classes/cve-check.bbclass b/meta/classes/cve-check.bbclass
index c946de29a4..bc35a1c53c 100644
--- a/meta/classes/cve-check.bbclass
+++ b/meta/classes/cve-check.bbclass
@@ -324,8 +324,8 @@ def check_cves(d, patched_cves):
     # Convert CVE_STATUS into ignored CVEs and check validity
     cve_ignore = []
     for cve in (d.getVarFlags("CVE_STATUS") or {}):
-        decoded_status, _, _ = decode_cve_status(d, cve)
-        if decoded_status == "Ignored":
+        decoded_status = decode_cve_status(d, cve)
+        if 'mapping' in decoded_status and decoded_status['mapping'] == "Ignored":
             cve_ignore.append(cve)
 
     import sqlite3
@@ -507,11 +507,11 @@ def cve_write_data_text(d, patched, unpatched, ignored, cve_data):
         write_string += "PACKAGE VERSION: %s%s\n" % (d.getVar("EXTENDPE"), d.getVar("PV"))
         write_string += "CVE: %s\n" % cve
         write_string += "CVE STATUS: %s\n" % status
-        _, detail, description = decode_cve_status(d, cve)
-        if detail:
-            write_string += "CVE DETAIL: %s\n" % detail
-        if description:
-            write_string += "CVE DESCRIPTION: %s\n" % description
+        status_details = decode_cve_status(d, cve)
+        if 'detail' in status_details:
+            write_string += "CVE DETAIL: %s\n" % status_details['detail']
+        if 'description' in status_details:
+            write_string += "CVE DESCRIPTION: %s\n" % status_details['description']
         write_string += "CVE SUMMARY: %s\n" % cve_data[cve]["summary"]
         write_string += "CVSS v2 BASE SCORE: %s\n" % cve_data[cve]["scorev2"]
         write_string += "CVSS v3 BASE SCORE: %s\n" % cve_data[cve]["scorev3"]
@@ -637,11 +637,11 @@ def cve_write_data_json(d, patched, unpatched, ignored, cve_data, cve_status):
             "status" : status,
             "link": issue_link
         }
-        _, detail, description = decode_cve_status(d, cve)
-        if detail:
-            cve_item["detail"] = detail
-        if description:
-            cve_item["description"] = description
+        status_details = decode_cve_status(d, cve)
+        if 'detail' in status_details:
+            cve_item["detail"] = status_details['detail']
+        if 'description' in status_details:
+            cve_item["description"] = status_details['description']
         cve_list.append(cve_item)
 
     package_data["issue"] = cve_list
diff --git a/meta/lib/oe/cve_check.py b/meta/lib/oe/cve_check.py
index ed5c714cb8..5edd34a2d9 100644
--- a/meta/lib/oe/cve_check.py
+++ b/meta/lib/oe/cve_check.py
@@ -132,8 +132,8 @@ def get_patched_cves(d):
 
     # Search for additional patched CVEs
     for cve in (d.getVarFlags("CVE_STATUS") or {}):
-        decoded_status, _, _ = decode_cve_status(d, cve)
-        if decoded_status == "Patched":
+        decoded_status = decode_cve_status(d, cve)
+        if 'mapping' in decoded_status and decoded_status['mapping'] == "Patched":
             bb.debug(2, "CVE %s is additionally patched" % cve)
             patched_cves.add(cve)
 
@@ -227,19 +227,40 @@ def convert_cve_version(version):
 
 def decode_cve_status(d, cve):
     """
-    Convert CVE_STATUS into status, detail and description.
+    Convert CVE_STATUS into status, vendor, product, detail and description.
     """
     status = d.getVarFlag("CVE_STATUS", cve)
     if not status:
-        return ("", "", "")
+        return {}
+
+    status_split = status.split(':', 5)
+    status_out = {}
+    status_out["detail"] = status_split[0]
+    product = "*"
+    vendor = "*"
+    description = ""
+    if len(status_split) >= 4 and status_split[1].strip() == "cpe":
+        # Both vendor and product are mandatory if cpe: present, the syntax is then:
+        # detail: cpe:vendor:product:description
+        vendor = status_split[2].strip()
+        product = status_split[3].strip()
+        description = status_split[4].strip()
+    elif len(status_split) >= 2 and status_split[1].strip() == "cpe":
+        # Malformed CPE
+        bb.warn('Invalid CPE information for CVE_STATUS[%s] = "%s", not setting CPE' % (detail, cve, status))
+    else:
+        # Other case: no CPE, the syntax is then:
+        # detail: description
+        description = status_split[len(status_split)-1].strip() if (len(status_split) > 1) else ""
 
-    status_split = status.split(':', 1)
-    detail = status_split[0]
-    description = status_split[1].strip() if (len(status_split) > 1) else ""
+    status_out["vendor"] = vendor
+    status_out["product"] = product
+    status_out["description"] = description
 
-    status_mapping = d.getVarFlag("CVE_CHECK_STATUSMAP", detail)
+    status_mapping = d.getVarFlag("CVE_CHECK_STATUSMAP", status_out['detail'])
     if status_mapping is None:
         bb.warn('Invalid detail "%s" for CVE_STATUS[%s] = "%s", fallback to Unpatched' % (detail, cve, status))
         status_mapping = "Unpatched"
+    status_out["mapping"] = status_mapping
 
-    return (status_mapping, detail, description)
+    return status_out
diff --git a/meta/lib/oe/spdx30_tasks.py b/meta/lib/oe/spdx30_tasks.py
index 03dc47db02..4864d6252a 100644
--- a/meta/lib/oe/spdx30_tasks.py
+++ b/meta/lib/oe/spdx30_tasks.py
@@ -488,21 +488,22 @@ def create_spdx(d):
     cve_by_status = {}
     if include_vex != "none":
         for cve in d.getVarFlags("CVE_STATUS") or {}:
-            status, detail, description = oe.cve_check.decode_cve_status(d, cve)
+            decoded_status = oe.cve_check.decode_cve_status(d, cve)
 
             # If this CVE is fixed upstream, skip it unless all CVEs are
             # specified.
-            if include_vex != "all" and detail in (
+            if include_vex != "all" and 'detail' in decoded_status and \
+                decoded_status['detail'] in (
                 "fixed-version",
                 "cpe-stable-backport",
             ):
                 bb.debug(1, "Skipping %s since it is already fixed upstream" % cve)
                 continue
 
-            cve_by_status.setdefault(status, {})[cve] = (
+            cve_by_status.setdefault(decoded_status['mapping'], {})[cve] = (
                 build_objset.new_cve_vuln(cve),
-                detail,
-                description,
+                decoded_status['detail'],
+                decoded_status['description'],
             )
 
     cpe_ids = oe.cve_check.get_cpe_ids(d.getVar("CVE_PRODUCT"), d.getVar("CVE_VERSION"))