And a small understanding. We are supplying buffer is about to 128 bytes to fill the converted message, So, if the obj(ASN1_OBJECT) size is more than that(supplied buffer) size OBJ_obj2txt will do truncate and will return the obj(ASN1_OBJECT) message length. It results in more than 128(returned length) bytes. Because of this crash is happening. (or) In which scenario the OBJ_obj2txt() truncates the supplied message. -- View this message in context: http://openssl.6102.n7.nabble.com/CVE-2016-2180-tp67815p68392.html Sent from the OpenSSL - User mailing list archive at Nabble.com.