Siemens RUGGEDCOM, SCALANCE and SIMATIC Out-of-bounds Read (CVE-2021-3712)

ASN.1 strings are represented internally within OpenSSL as an ASN1STRING structure which contains a buffer holding the string data and a field holding the buffer length. This contrasts with normal C strings which are repesented as a buffer for the string data which is terminated with a NUL 0 byte...