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Merge branch 'maint-0.3.2'

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This commit is contained in:
Nick Mathewson 2017-11-05 14:09:21 -05:00
commit 9f650b24e9
8 changed files with 37 additions and 24 deletions
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7
changes/ticket21031 Normal file
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@ -0,0 +1,7 @@
o Minor features (removed deprecations):
- The ClientDNSRejectInternalAddresses flag can once again be set in
non-testing Tor networks, so long as they do not use the default
directory authorities.
This change also removes the deprecation of this
flag in 0.2.9.2-alpha. Closes ticket 21031.

17
doc/tor.1.txt
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@ -1440,9 +1440,15 @@ The following options are useful only for clients (that is, if
addresses/ports. See SocksPort for an explanation of isolation
flags. (Default: 0)
[[ClientDNSRejectInternalAddresses]] **ClientDNSRejectInternalAddresses** **0**|**1**::
If true, Tor does not believe any anonymously retrieved DNS answer that
tells it that an address resolves to an internal address (like 127.0.0.1 or
192.168.0.1). This option prevents certain browser-based attacks; it
is not allowed to be set on the default network. (Default: 1)
[[ClientRejectInternalAddresses]] **ClientRejectInternalAddresses** **0**|**1**::
If true, Tor does not try to fulfill requests to connect to an internal
address (like 127.0.0.1 or 192.168.0.1) __unless a exit node is
address (like 127.0.0.1 or 192.168.0.1) __unless an exit node is
specifically requested__ (for example, via a .exit hostname, or a
controller request). If true, multicast DNS hostnames for machines on the
local network (of the form *.local) are also rejected. (Default: 1)
@ -2606,7 +2612,7 @@ The following options are used for running a testing Tor network.
4 (for 40 seconds), 8, 16, 32, 60
ClientBootstrapConsensusMaxDownloadTries 80
ClientBootstrapConsensusAuthorityOnlyMaxDownloadTries 80
TestingClientDNSRejectInternalAddresses 0
ClientDNSRejectInternalAddresses 0
ClientRejectInternalAddresses 0
CountPrivateBandwidth 1
ExitPolicyRejectPrivate 0
@ -2817,13 +2823,6 @@ The following options are used for running a testing Tor network.
we replace it and issue a new key?
(Default: 3 hours for link and auth; 1 day for signing.)
[[ClientDNSRejectInternalAddresses]] [[TestingClientDNSRejectInternalAddresses]] **TestingClientDNSRejectInternalAddresses** **0**|**1**::
If true, Tor does not believe any anonymously retrieved DNS answer that
tells it that an address resolves to an internal address (like 127.0.0.1 or
192.168.0.1). This option prevents certain browser-based attacks; don't
turn it off unless you know what you're doing. (Default: 1)
NON-PERSISTENT OPTIONS
----------------------

18
src/or/config.c
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@ -170,8 +170,6 @@ static config_abbrev_t option_abbrevs_[] = {
{ "BridgeAuthoritativeDirectory", "BridgeAuthoritativeDir", 0, 0},
{ "HashedControlPassword", "__HashedControlSessionPassword", 1, 0},
{ "VirtualAddrNetwork", "VirtualAddrNetworkIPv4", 0, 0},
{ "ClientDNSRejectInternalAddresses",
"TestingClientDNSRejectInternalAddresses", 0, 1, },
{ NULL, NULL, 0, 0},
};
@ -263,7 +261,7 @@ static config_var_t option_vars_[] = {
V(CircuitsAvailableTimeout, INTERVAL, "0"),
V(CircuitStreamTimeout, INTERVAL, "0"),
V(CircuitPriorityHalflife, DOUBLE, "-100.0"), /*negative:'Use default'*/
V(TestingClientDNSRejectInternalAddresses, BOOL,"1"),
V(ClientDNSRejectInternalAddresses, BOOL,"1"),
V(ClientOnly, BOOL, "0"),
V(ClientPreferIPv6ORPort, AUTOBOOL, "auto"),
V(ClientPreferIPv6DirPort, AUTOBOOL, "auto"),
@ -651,7 +649,7 @@ static const config_var_t testing_tor_network_defaults[] = {
"0, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 8, 16, 32, 60"),
V(ClientBootstrapConsensusMaxDownloadTries, UINT, "80"),
V(ClientBootstrapConsensusAuthorityOnlyMaxDownloadTries, UINT, "80"),
V(TestingClientDNSRejectInternalAddresses, BOOL,"0"),
V(ClientDNSRejectInternalAddresses, BOOL,"0"),
V(ClientRejectInternalAddresses, BOOL, "0"),
V(CountPrivateBandwidth, BOOL, "1"),
V(ExitPolicyRejectPrivate, BOOL, "0"),
@ -696,7 +694,12 @@ static const config_var_t testing_tor_network_defaults[] = {
#undef OBSOLETE
static const config_deprecation_t option_deprecation_notes_[] = {
/* Deprecated since 0.3.2.1-alpha. */
/* Deprecated since 0.2.9.2-alpha... */
{ "AllowDotExit", "Unrestricted use of the .exit notation can be used for "
"a wide variety of application-level attacks." },
/* End of options deprecated since 0.2.9.2-alpha. */
/* Deprecated since 0.3.2.0-alpha. */
{ "HTTPProxy", "It only applies to direct unencrypted HTTP connections "
"to your directory server, which your Tor probably wasn't using." },
{ "HTTPProxyAuthenticator", "HTTPProxy is deprecated in favor of HTTPSProxy "
@ -4258,9 +4261,12 @@ options_validate(or_options_t *old_options, or_options_t *options,
CHECK_DEFAULT(TestingSigningKeySlop);
CHECK_DEFAULT(TestingAuthKeySlop);
CHECK_DEFAULT(TestingLinkKeySlop);
CHECK_DEFAULT(TestingClientDNSRejectInternalAddresses);
#undef CHECK_DEFAULT
if (!options->ClientDNSRejectInternalAddresses &&
!(options->DirAuthorities ||
(options->AlternateDirAuthority && options->AlternateBridgeAuthority)))
REJECT("ClientDNSRejectInternalAddresses used for default network.");
if (options->SigningKeyLifetime < options->TestingSigningKeySlop*2)
REJECT("SigningKeyLifetime is too short.");
if (options->TestingLinkCertLifetime < options->TestingAuthKeySlop*2)

2
src/or/connection_edge.c
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@ -1344,7 +1344,7 @@ connection_ap_handshake_rewrite(entry_connection_t *conn,
/* Hang on, did we find an answer saying that this is a reverse lookup for
* an internal address? If so, we should reject it if we're configured to
* do so. */
if (options->TestingClientDNSRejectInternalAddresses) {
if (options->ClientDNSRejectInternalAddresses) {
/* Don't let clients try to do a reverse lookup on 10.0.0.1. */
tor_addr_t addr;
int ok;

2
src/or/or.h
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@ -4207,7 +4207,7 @@ typedef struct {
/** If true, do not believe anybody who tells us that a domain resolves
* to an internal address, or that an internal address has a PTR mapping.
* Helps avoid some cross-site attacks. */
int TestingClientDNSRejectInternalAddresses;
int ClientDNSRejectInternalAddresses;
/** If true, do not accept any requests to connect to internal addresses
* over randomly chosen exits. */

6
src/or/relay.c
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@ -949,7 +949,7 @@ connection_ap_process_end_not_open(
connection_mark_unattached_ap(conn, END_STREAM_REASON_TORPROTOCOL);
return 0;
}
if (get_options()->TestingClientDNSRejectInternalAddresses &&
if (get_options()->ClientDNSRejectInternalAddresses &&
tor_addr_is_internal(&addr, 0)) {
log_info(LD_APP,"Address '%s' resolved to internal. Closing,",
safe_str(conn->socks_request->address));
@ -1366,7 +1366,7 @@ connection_edge_process_resolved_cell(edge_connection_t *conn,
goto done;
}
if (get_options()->TestingClientDNSRejectInternalAddresses) {
if (get_options()->ClientDNSRejectInternalAddresses) {
int orig_len = smartlist_len(resolved_addresses);
SMARTLIST_FOREACH_BEGIN(resolved_addresses, address_ttl_t *, addr) {
if (addr->hostname == NULL && tor_addr_is_internal(&addr->addr, 0)) {
@ -1459,7 +1459,7 @@ connection_edge_process_relay_cell_not_open(
if (tor_addr_family(&addr) != AF_UNSPEC) {
const sa_family_t family = tor_addr_family(&addr);
if (tor_addr_is_null(&addr) ||
(get_options()->TestingClientDNSRejectInternalAddresses &&
(get_options()->ClientDNSRejectInternalAddresses &&
tor_addr_is_internal(&addr, 0))) {
log_info(LD_APP, "...but it claims the IP address was %s. Closing.",
fmt_addr(&addr));

5
src/test/test_options.c
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@ -398,11 +398,12 @@ fixed_get_uname(void)
"V3AuthVoteDelay 20\n" \
"V3AuthDistDelay 20\n" \
"V3AuthNIntervalsValid 3\n" \
"ClientUseIPv4 1\n" \
"ClientUseIPv4 1\n" \
"VirtualAddrNetworkIPv4 127.192.0.0/10\n" \
"VirtualAddrNetworkIPv6 [FE80::]/10\n" \
"UseEntryGuards 1\n" \
"Schedulers Vanilla\n"
"Schedulers Vanilla\n" \
"ClientDNSRejectInternalAddresses 1\n"
typedef struct {
or_options_t *old_opt;

4
src/test/test_relaycell.c
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@ -112,7 +112,7 @@ test_relaycell_resolved(void *arg)
MOCK(connection_mark_unattached_ap_, mark_unattached_mock);
MOCK(connection_ap_handshake_socks_resolved, socks_resolved_mock);
options->TestingClientDNSRejectInternalAddresses = 0;
options->ClientDNSRejectInternalAddresses = 0;
SET_CELL(/* IPv4: 127.0.1.2, ttl 256 */
"\x04\x04\x7f\x00\x01\x02\x00\x00\x01\x00"
@ -151,7 +151,7 @@ test_relaycell_resolved(void *arg)
/* But we may be discarding private answers. */
MOCK_RESET();
options->TestingClientDNSRejectInternalAddresses = 1;
options->ClientDNSRejectInternalAddresses = 1;
r = connection_edge_process_resolved_cell(edgeconn, &cell, &rh);
tt_int_op(r, OP_EQ, 0);
ASSERT_MARK_CALLED(END_STREAM_REASON_DONE|