1 files changed, 6 insertions, 0 deletions

diff --git a/src/lib/libcrypto/asn1/a_bitstr.c b/src/lib/libcrypto/asn1/a_bitstr.c
index ed0bdfbde1..e0265f69d2 100644
--- a/src/lib/libcrypto/asn1/a_bitstr.c
+++ b/src/lib/libcrypto/asn1/a_bitstr.c
@@ -120,6 +120,12 @@ ASN1_BIT_STRING *c2i_ASN1_BIT_STRING(ASN1_BIT_STRING **a, unsigned char **pp,
         unsigned char *p,*s;
         int i;
 
+        if (len < 1)
+                {
+                i=ASN1_R_STRING_TOO_SHORT;
+                goto err;
+                }
+
         if ((a == NULL) || ((*a) == NULL))
                 {
                 if ((ret=M_ASN1_BIT_STRING_new()) == NULL) return(NULL);