Test for CVE-2026-45447 (UAF in PKCS7_verify)

The test data were created with a tool developed by
Thai Duong <thai@calif.io>.

Reviewed-by: Eugene Syromiatnikov <esyr@openssl.org>
Reviewed-by: Tomas Mraz <tomas@openssl.foundation>
MergeDate: Mon Jun  8 20:22:52 2026

diff --git a/test/recipes/80-test_cms.t b/test/recipes/80-test_cms.t
index 160ad81ae38d0a71b2d774f444bd4937518f0354..34b5fc41712e9a2f49105628e28ffb1e0f63424a 100644 (file)
--- a/test/recipes/80-test_cms.t
+++ b/test/recipes/80-test_cms.t
@@ -56,7 +56,7 @@ my ($no_des, $no_dh, $no_dsa, $no_ec, $no_ec2m, $no_rc2, $no_zlib)
 
 $no_rc2 = 1 if disabled("legacy");
 
-plan tests => 38;
+plan tests => 39;
 
 ok(run(test(["pkcs7_test"])), "test pkcs7");
 
@@ -1263,6 +1263,23 @@ subtest "CMS code signing test" => sub {
        "fail verify CMS signature with code signing certificate for purpose smime_sign");
 };
 
+# Regression test for PKCS7_verify() ownership handling when
+# digestAlgorithms is an empty SET.
+# The malformed structure must fail cleanly without crashing or
+# triggering use-after-free behaviour.
+with({ exit_checker => sub { return shift == 4; } },
+    sub {
+        ok(run(app([
+                'openssl', 'smime',
+                '-verify',
+                '-noverify',
+                '-in',
+                srctop_file('test', 'smime-eml',
+                            'pkcs7-empty-digest-set.eml'),
+            ])),
+           "Check empty digestAlgorithms SET is handled safely");
+    });
+
 # Test case for missing MD algorithm (must not segfault)
 
 with({ exit_checker => sub { return shift == 4; } },

diff --git a/test/smime-eml/pkcs7-empty-digest-set.eml b/test/smime-eml/pkcs7-empty-digest-set.eml
new file mode 100644 (file)
index 0000000..a6db2c3
--- /dev/null
+++ b/test/smime-eml/pkcs7-empty-digest-set.eml
@@ -0,0 +1,45 @@
+MIME-Version: 1.0
+Content-Type: multipart/signed; protocol="application/x-pkcs7-signature"; micalg="sha-256"; boundary="----E0314CC5D732C92AE2D7A3BACDCDCFCE"
+
+This is an S/MIME signed message
+
+------E0314CC5D732C92AE2D7A3BACDCDCFCE
+This is the content to be signed.
+
+------E0314CC5D732C92AE2D7A3BACDCDCFCE
+Content-Type: application/x-pkcs7-signature; name="smime.p7s"
+Content-Transfer-Encoding: base64
+Content-Disposition: attachment; filename="smime.p7s"
+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+
+------E0314CC5D732C92AE2D7A3BACDCDCFCE--
+