1 files changed, 10 insertions, 3 deletions
diff --git a/crypto/asn1/a_bitstr.c b/crypto/asn1/a_bitstr.c
index f906188..0c8bb14 100644
--- a/crypto/asn1/a_bitstr.c
+++ b/crypto/asn1/a_bitstr.c
@@ -56,6 +56,7 @@
  * [including the GNU Public Licence.]
  */
 
+#include <limits.h>
 #include <stdio.h>
 #include "cryptlib.h"
 #include <openssl/asn1.h>
@@ -114,10 +115,11 @@ int i2c_ASN1_BIT_STRING(ASN1_BIT_STRING *a, unsigned char **pp)
 
     *(p++) = (unsigned char)bits;
     d = a->data;
-    memcpy(p, d, len);
-    p += len;
-    if (len > 0)
+    if (len > 0) {
+        memcpy(p, d, len);
+        p += len;
         p[-1] &= (0xff << bits);
+    }
     *pp = p;
     return (ret);
 }
@@ -135,6 +137,11 @@ ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a,
         goto err;
     }
 
+    if (len > INT_MAX) {
+        i = ASN1_R_STRING_TOO_LONG;
+        goto err;
+    }
+
     if ((a == NULL) || ((*a) == NULL)) {
         if ((ret = M_ASN1_BIT_STRING_new()) == NULL)
             return (NULL);