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Merge pull request #5639 

2eef90d6 rpc: restrict the recent cutoff size in restricted RPC mode (moneromooo-monero)
0564da5f ensure no NULL is passed to memcpy (moneromooo-monero)
bc09766b abstract_tcp_server2: improve DoS resistance (moneromooo-monero)
1387549e serialization: check stream good flag at the end (moneromooo-monero)
a00cabd4 tree-hash: allocate variable memory on heap, not stack (moneromooo-monero)
f2152192 cryptonote: throw on tx hash calculation error (moneromooo-monero)
db2b9fba serialization: fail on read_varint error (moneromooo-monero)
68ad5481 cryptonote_protocol: fix another potential P2P DoS (moneromooo-monero)
1cc61018 cryptonote_protocol: expand basic DoS protection (moneromooo-monero)
8f66b705 cryptonote_protocol_handler: prevent potential DoS (anonimal)
39169ace epee: basic sanity check on allocation size from untrusted source (moneromooo-monero)
This commit is contained in:
Riccardo Spagni 2019-06-14 16:19:45 +02:00
parent 7b3df89bd4 2eef90d6ef
commit 1d5e8f461d
No known key found for this signature in database
GPG Key ID: 55432DF31CCD4FCD
15 changed files with 78 additions and 28 deletions
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9
contrib/epee/include/net/abstract_tcp_server2.inl
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@ -54,6 +54,9 @@
#undef MONERO_DEFAULT_LOG_CATEGORY
#define MONERO_DEFAULT_LOG_CATEGORY "net"
#define AGGRESSIVE_TIMEOUT_THRESHOLD 120 // sockets
#define NEW_CONNECTION_TIMEOUT_LOCAL 1200000 // 2 minutes
#define NEW_CONNECTION_TIMEOUT_REMOTE 10000 // 10 seconds
#define DEFAULT_TIMEOUT_MS_LOCAL 1800000 // 30 minutes
#define DEFAULT_TIMEOUT_MS_REMOTE 300000 // 5 minutes
#define TIMEOUT_EXTRA_MS_PER_BYTE 0.2
@ -189,7 +192,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
m_protocol_handler.after_init_connection();
reset_timer(get_default_timeout(), false);
reset_timer(boost::posix_time::milliseconds(m_local ? NEW_CONNECTION_TIMEOUT_LOCAL : NEW_CONNECTION_TIMEOUT_REMOTE), false);
// first read on the raw socket to detect SSL for the server
buffer_ssl_init_fill = 0;
@ -691,7 +694,7 @@ PRAGMA_WARNING_DISABLE_VS(4355)
{
unsigned count;
try { count = host_count(m_host); } catch (...) { count = 0; }
const unsigned shift = std::min(std::max(count, 1u) - 1, 8u);
const unsigned shift = get_state().sock_count > AGGRESSIVE_TIMEOUT_THRESHOLD ? std::min(std::max(count, 1u) - 1, 8u) : 0;
boost::posix_time::milliseconds timeout(0);
if (m_local)
timeout = boost::posix_time::milliseconds(DEFAULT_TIMEOUT_MS_LOCAL >> shift);
@ -730,8 +733,6 @@ PRAGMA_WARNING_DISABLE_VS(4355)
template<class t_protocol_handler>
void connection<t_protocol_handler>::reset_timer(boost::posix_time::milliseconds ms, bool add)
{
if (m_connection_type != e_connection_type_RPC)
return;
MTRACE("Setting " << ms << " expiry");
auto self = safe_shared_from_this();
if(!self)

1
contrib/epee/include/storages/portable_storage_from_bin.h
View File

@ -136,6 +136,7 @@ namespace epee
//for pod types
array_entry_t<type_name> sa;
size_t size = read_varint();
CHECK_AND_ASSERT_THROW_MES(size <= m_count, "Size sanity check failed");
sa.reserve(size);
//TODO: add some optimization here later
while(size--)

3
contrib/epee/src/buffer.cpp
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@ -64,7 +64,8 @@ void buffer::append(const void *data, size_t sz)
size_t reserve = (((size() + sz) * 3 / 2) + 4095) & ~4095;
new_storage.reserve(reserve);
new_storage.resize(size());
memcpy(new_storage.data(), storage.data() + offset, storage.size() - offset);
if (size() > 0)
memcpy(new_storage.data(), storage.data() + offset, storage.size() - offset);
offset = 0;
std::swap(storage, new_storage);
}

17
contrib/epee/src/wipeable_string.cpp
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@ -62,13 +62,15 @@ wipeable_string::wipeable_string(wipeable_string &&other)
wipeable_string::wipeable_string(const std::string &other)
{
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
if (size() > 0)
memcpy(buffer.data(), other.c_str(), size());
}
wipeable_string::wipeable_string(std::string &&other)
{
grow(other.size());
memcpy(buffer.data(), other.c_str(), size());
if (size() > 0)
memcpy(buffer.data(), other.c_str(), size());
if (!other.empty())
{
memwipe(&other[0], other.size()); // we're kinda left with this again aren't we
@ -79,7 +81,8 @@ wipeable_string::wipeable_string(std::string &&other)
wipeable_string::wipeable_string(const char *s)
{
grow(strlen(s));
memcpy(buffer.data(), s, size());
if (size() > 0)
memcpy(buffer.data(), s, size());
}
wipeable_string::wipeable_string(const char *s, size_t len)
@ -112,14 +115,18 @@ void wipeable_string::grow(size_t sz, size_t reserved)
}
size_t old_sz = buffer.size();
std::unique_ptr<char[]> tmp{new char[old_sz]};
memcpy(tmp.get(), buffer.data(), old_sz * sizeof(char));
if (old_sz > 0)
{
memcpy(tmp.get(), buffer.data(), old_sz * sizeof(char));
memwipe(buffer.data(), old_sz * sizeof(char));
}
buffer.reserve(reserved);
buffer.resize(sz);
memcpy(buffer.data(), tmp.get(), old_sz * sizeof(char));
if (old_sz > 0)
{
memcpy(buffer.data(), tmp.get(), old_sz * sizeof(char));
memwipe(tmp.get(), old_sz * sizeof(char));
}
}
void wipeable_string::push_back(char c)

4
src/blockchain_db/lmdb/db_lmdb.cpp
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@ -1077,11 +1077,11 @@ void BlockchainLMDB::add_tx_amount_output_indices(const uint64_t tx_id,
int result = 0;
int num_outputs = amount_output_indices.size();
size_t num_outputs = amount_output_indices.size();
MDB_val_set(k_tx_id, tx_id);
MDB_val v;
v.mv_data = (void *)amount_output_indices.data();
v.mv_data = num_outputs ? (void *)amount_output_indices.data() : (void*)"";
v.mv_size = sizeof(uint64_t) * num_outputs;
// LOG_PRINT_L1("tx_outputs[tx_hash] size: " << v.mv_size);

3
src/crypto/keccak.c
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@ -116,7 +116,8 @@ void keccak(const uint8_t *in, size_t inlen, uint8_t *md, int mdlen)
local_abort("Bad keccak use");
}
memcpy(temp, in, inlen);
if (inlen > 0)
memcpy(temp, in, inlen);
temp[inlen++] = 1;
memset(temp + inlen, 0, rsiz - inlen);
temp[rsiz - 1] |= 0x80;

12
src/crypto/tree-hash.c
View File

@ -30,6 +30,7 @@
#include <assert.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include "hash-ops.h"
@ -82,23 +83,24 @@ void tree_hash(const char (*hashes)[HASH_SIZE], size_t count, char *root_hash) {
size_t cnt = tree_hash_cnt( count );
char ints[cnt][HASH_SIZE];
memset(ints, 0 , sizeof(ints)); // zero out as extra protection for using uninitialized mem
char *ints = calloc(cnt, HASH_SIZE); // zero out as extra protection for using uninitialized mem
assert(ints);
memcpy(ints, hashes, (2 * cnt - count) * HASH_SIZE);
for (i = 2 * cnt - count, j = 2 * cnt - count; j < cnt; i += 2, ++j) {
cn_fast_hash(hashes[i], 64, ints[j]);
cn_fast_hash(hashes[i], 64, ints + j * HASH_SIZE);
}
assert(i == count);
while (cnt > 2) {
cnt >>= 1;
for (i = 0, j = 0; j < cnt; i += 2, ++j) {
cn_fast_hash(ints[i], 64, ints[j]);
cn_fast_hash(ints + i * HASH_SIZE, 64, ints + j * HASH_SIZE);
}
}
cn_fast_hash(ints[0], 64, root_hash);
cn_fast_hash(ints, 64, root_hash);
free(ints);
}
}

2
src/cryptonote_basic/cryptonote_basic.h
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@ -320,7 +320,7 @@ namespace cryptonote
}
if (!typename Archive<W>::is_saving())
pruned = true;
return true;
return ar.stream().good();
}
private:

6
src/cryptonote_basic/cryptonote_format_utils.cpp
View File

@ -221,8 +221,7 @@ namespace cryptonote
tx.invalidate_hashes();
//TODO: validate tx
get_transaction_hash(tx, tx_hash);
return true;
return get_transaction_hash(tx, tx_hash);
}
//---------------------------------------------------------------
bool parse_and_validate_tx_from_blob(const blobdata& tx_blob, transaction& tx, crypto::hash& tx_hash, crypto::hash& tx_prefix_hash)
@ -975,6 +974,7 @@ namespace cryptonote
{
crypto::hash h = null_hash;
get_transaction_hash(t, h, NULL);
CHECK_AND_ASSERT_THROW_MES(get_transaction_hash(t, h, NULL), "Failed to calculate transaction hash");
return h;
}
//---------------------------------------------------------------
@ -1327,7 +1327,7 @@ namespace cryptonote
txs_ids.reserve(1 + b.tx_hashes.size());
crypto::hash h = null_hash;
size_t bl_sz = 0;
get_transaction_hash(b.miner_tx, h, bl_sz);
CHECK_AND_ASSERT_THROW_MES(get_transaction_hash(b.miner_tx, h, bl_sz), "Failed to calculate transaction hash");
txs_ids.push_back(h);
for(auto& th: b.tx_hashes)
txs_ids.push_back(th);

1
src/cryptonote_protocol/cryptonote_protocol_handler.h
View File

@ -52,6 +52,7 @@ PUSH_WARNINGS
DISABLE_VS_WARNINGS(4355)
#define LOCALHOST_INT 2130706433
#define CURRENCY_PROTOCOL_MAX_OBJECT_REQUEST_COUNT 500
namespace cryptonote
{

26
src/cryptonote_protocol/cryptonote_protocol_handler.inl
View File

@ -809,12 +809,27 @@ namespace cryptonote
NOTIFY_NEW_FLUFFY_BLOCK::request fluffy_response;
fluffy_response.b.block = t_serializable_object_to_blob(b);
fluffy_response.current_blockchain_height = arg.current_blockchain_height;
std::vector<bool> seen(b.tx_hashes.size(), false);
for(auto& tx_idx: arg.missing_tx_indices)
{
if(tx_idx < b.tx_hashes.size())
{
MDEBUG(" tx " << b.tx_hashes[tx_idx]);
if (seen[tx_idx])
{
LOG_ERROR_CCONTEXT
(
"Failed to handle request NOTIFY_REQUEST_FLUFFY_MISSING_TX"
<< ", request is asking for duplicate tx "
<< ", tx index = " << tx_idx << ", block tx count " << b.tx_hashes.size()
<< ", block_height = " << arg.current_blockchain_height
<< ", dropping connection"
);
drop_connection(context, true, false);
return 1;
}
txids.push_back(b.tx_hashes[tx_idx]);
seen[tx_idx] = true;
}
else
{
@ -914,6 +929,17 @@ namespace cryptonote
int t_cryptonote_protocol_handler<t_core>::handle_request_get_objects(int command, NOTIFY_REQUEST_GET_OBJECTS::request& arg, cryptonote_connection_context& context)
{
MLOG_P2P_MESSAGE("Received NOTIFY_REQUEST_GET_OBJECTS (" << arg.blocks.size() << " blocks, " << arg.txs.size() << " txes)");
if (arg.blocks.size() + arg.txs.size() > CURRENCY_PROTOCOL_MAX_OBJECT_REQUEST_COUNT)
{
LOG_ERROR_CCONTEXT(
"Requested objects count is too big ("
<< arg.blocks.size() + arg.txs.size() << ") expected not more then "
<< CURRENCY_PROTOCOL_MAX_OBJECT_REQUEST_COUNT);
drop_connection(context, false, false);
return 1;
}
NOTIFY_RESPONSE_GET_OBJECTS::request rsp;
if(!m_core.handle_get_objects(arg, rsp, context))
{

8
src/ringct/rctTypes.h
View File

@ -252,7 +252,7 @@ namespace rct {
{
FIELD(type)
if (type == RCTTypeNull)
return true;
return ar.stream().good();
if (type != RCTTypeFull && type != RCTTypeSimple && type != RCTTypeBulletproof && type != RCTTypeBulletproof2)
return false;
VARINT_FIELD(txnFee)
@ -312,7 +312,7 @@ namespace rct {
ar.delimit_array();
}
ar.end_array();
return true;
return ar.stream().good();
}
};
struct rctSigPrunable {
@ -325,7 +325,7 @@ namespace rct {
bool serialize_rctsig_prunable(Archive<W> &ar, uint8_t type, size_t inputs, size_t outputs, size_t mixin)
{
if (type == RCTTypeNull)
return true;
return ar.stream().good();
if (type != RCTTypeFull && type != RCTTypeSimple && type != RCTTypeBulletproof && type != RCTTypeBulletproof2)
return false;
if (type == RCTTypeBulletproof || type == RCTTypeBulletproof2)
@ -429,7 +429,7 @@ namespace rct {
}
ar.end_array();
}
return true;
return ar.stream().good();
}
};

9
src/rpc/core_rpc_server.cpp
View File

@ -59,6 +59,8 @@ using namespace epee;
#define MAX_RESTRICTED_FAKE_OUTS_COUNT 40
#define MAX_RESTRICTED_GLOBAL_FAKE_OUTS_COUNT 5000
#define OUTPUT_HISTOGRAM_RECENT_CUTOFF_RESTRICTION (3 * 86400) // 3 days max, the wallet requests 1.8 days
namespace
{
void add_reason(std::string &reasons, const char *reason)
@ -1882,6 +1884,13 @@ namespace cryptonote
if (use_bootstrap_daemon_if_necessary<COMMAND_RPC_GET_OUTPUT_HISTOGRAM>(invoke_http_mode::JON_RPC, "get_output_histogram", req, res, r))
return r;
const bool restricted = m_restricted && ctx;
if (restricted && req.recent_cutoff > 0 && req.recent_cutoff < (uint64_t)time(NULL) - OUTPUT_HISTOGRAM_RECENT_CUTOFF_RESTRICTION)
{
res.status = "Recent cutoff is too old";
return true;
}
std::map<uint64_t, std::tuple<uint64_t, uint64_t, uint64_t>> histogram;
try
{

3
src/serialization/binary_archive.h
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@ -146,7 +146,8 @@ struct binary_archive<false> : public binary_archive_base<std::istream, false>
void serialize_uvarint(T &v)
{
typedef std::istreambuf_iterator<char> it;
tools::read_varint(it(stream_), it(), v); // XXX handle failure
if (tools::read_varint(it(stream_), it(), v) < 0)
stream_.setstate(std::ios_base::failbit);
}
void begin_array(size_t &s)

2
src/serialization/serialization.h
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@ -212,7 +212,7 @@ inline bool do_serialize(Archive &ar, bool &v)
* \brief self-explanatory
*/
#define END_SERIALIZE() \
return true; \
return ar.stream().good(); \
}
/*! \macro VALUE(f)