Fix leak in cms_RecipientInfo_kekri_decrypt()

Free ec->key before reassigning it.

From OpenSSL 1.1.1, 58e1e397

ok inoguchi

diff --git a/lib/libcrypto/cms/cms_env.c b/lib/libcrypto/cms/cms_env.c
index 74d957e..a88ea63 100644 (file)
--- a/lib/libcrypto/cms/cms_env.c
+++ b/lib/libcrypto/cms/cms_env.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: cms_env.c,v 1.23 2019/10/04 18:03:56 tb Exp $ */
+/* $OpenBSD: cms_env.c,v 1.24 2021/09/08 14:33:02 tb Exp $ */
 /*
  * Written by Dr Stephen N Henson (steve@openssl.org) for the OpenSSL
  * project.
@@ -792,6 +792,7 @@ cms_RecipientInfo_kekri_decrypt(CMS_ContentInfo *cms, CMS_RecipientInfo *ri)
                goto err;
        }
 
+       freezero(ec->key, ec->keylen);
        ec->key = ukey;
        ec->keylen = ukeylen;