diff options
| -rw-r--r-- | src/libtls/tls_peer.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/libtls/tls_peer.c b/src/libtls/tls_peer.c index 86b94ab85..000dda43b 100644 --- a/src/libtls/tls_peer.c +++ b/src/libtls/tls_peer.c @@ -354,6 +354,13 @@ static status_t process_modp_key_exchange(private_tls_peer_t *this, this->alert->add(this->alert, TLS_FATAL, TLS_DECODE_ERROR); return NEED_MORE; } + /* reject (export) DH groups using primes smaller than 1024 bit */ + if (prime.len < 1024 / 8) + { + DBG1(DBG_TLS, "short DH prime received (%zu bytes)", prime.len); + this->alert->add(this->alert, TLS_FATAL, TLS_INTERNAL_ERROR); + return NEED_MORE; + } public = find_public_key(this); if (!public) { |