diff options
Diffstat (limited to 'lib/asn1/c_src')
| -rw-r--r-- | lib/asn1/c_src/asn1_erl_nif.c | 10 |
1 files changed, 8 insertions, 2 deletions
diff --git a/lib/asn1/c_src/asn1_erl_nif.c b/lib/asn1/c_src/asn1_erl_nif.c index d5aaadb89b..797be6d4f8 100644 --- a/lib/asn1/c_src/asn1_erl_nif.c +++ b/lib/asn1/c_src/asn1_erl_nif.c @@ -1,7 +1,7 @@ /* * %CopyrightBegin% * - * Copyright Ericsson AB 2002-2017. All Rights Reserved. + * Copyright Ericsson AB 2002-2018. All Rights Reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. @@ -949,6 +949,12 @@ static int ber_decode_value(ErlNifEnv* env, ERL_NIF_TERM *value, unsigned char * unsigned char *tmp_out_buff; ERL_NIF_TERM term = 0, curr_head = 0; + /* Recursion depth limitation, borrow a signed int: maybe_ret */ + maybe_ret = (int) (ErlNifSInt) ((char *)value - (char *)ib_index); + maybe_ret = maybe_ret < 0 ? -maybe_ret : maybe_ret; + if (maybe_ret >= sizeof(void *) * 8192) /* 8 k pointer words */ + return ASN1_ERROR; + if (((in_buf[*ib_index]) & 0x80) == ASN1_SHORT_DEFINITE_LENGTH) { len = in_buf[*ib_index]; } else if (in_buf[*ib_index] == ASN1_INDEFINITE_LENGTH) { @@ -993,7 +999,7 @@ static int ber_decode_value(ErlNifEnv* env, ERL_NIF_TERM *value, unsigned char * while (*ib_index < end_index) { if ((maybe_ret = ber_decode(env, &term, in_buf, ib_index, - in_buf_len)) <= ASN1_ERROR + *ib_index + len)) <= ASN1_ERROR ) return maybe_ret; curr_head = enif_make_list_cell(env, term, curr_head); |