TLV: raise error when length = 0

2023-07-27 10:40:29 +02:00
parent 530cfdab73
commit 0bc9ea00ac
1 changed files with 1 additions and 1 deletions
--- a/src_features/provideDomainName/cmd_provide_domain_name.c
+++ b/src_features/provideDomainName/cmd_provide_domain_name.c
@@ -479,7 +479,7 @@ static bool parse_der_value(const s_tlv_payload *payload, size_t *offset, uint32
            if ((*offset + byte_length) > payload->size) {
                PRINTF("TLV payload too small for DER encoded value\n");
            } else {
-                if (byte_length > sizeof(buf)) {
+                if (byte_length > sizeof(buf) || byte_length == 0) {
                    PRINTF("Unexpectedly long DER-encoded value (%u bytes)\n", byte_length);
                } else {
                    memset(buf, 0, (sizeof(buf) - byte_length));