tor-commits February 2021

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[tor/master] Merge branch 'maint-0.4.5'
by nickm＠torproject.org 01 Feb '21

01 Feb '21

commit a81581e6be5bc524429ebe513941006d00766e38 Merge: 732bbff29c 40eeb63b5e Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Feb 1 16:15:16 2021 -0500 Merge branch 'maint-0.4.5' "ours" to avoid version bump.

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[tor/master] bump to 0.4.5.5-rc-dev
by nickm＠torproject.org 01 Feb '21

01 Feb '21

commit 40eeb63b5ead3b8d2925387f0eecaa32a11a926d Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Feb 1 16:14:07 2021 -0500 bump to 0.4.5.5-rc-dev --- configure.ac | 4 ++-- contrib/win32build/tor-mingw.nsi.in | 2 +- src/win32/orconfig.h | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-) diff --git a/configure.ac b/configure.ac index 91b7d0a3e0..ce2ad6fb9d 100644 --- a/configure.ac +++ b/configure.ac @@ -4,7 +4,7 @@ dnl Copyright (c) 2007-2019, The Tor Project, Inc. dnl See LICENSE for licensing information AC_PREREQ([2.63]) -AC_INIT([tor],[0.4.5.5-rc]) +AC_INIT([tor],[0.4.5.5-rc-dev]) AC_CONFIG_SRCDIR([src/app/main/tor_main.c]) AC_CONFIG_MACRO_DIR([m4]) @@ -16,7 +16,7 @@ configure_flags="$*" # version number changes. Tor uses it to make sure that it # only shuts down for missing "required protocols" when those protocols # are listed as required by a consensus after this date. -AC_DEFINE(APPROX_RELEASE_DATE, ["2021-01-28"], # for 0.4.5.5-rc +AC_DEFINE(APPROX_RELEASE_DATE, ["2021-02-01"], # for 0.4.5.5-rc-dev [Approximate date when this software was released. (Updated when the version changes.)]) # "foreign" means we don't follow GNU package layout standards diff --git a/contrib/win32build/tor-mingw.nsi.in b/contrib/win32build/tor-mingw.nsi.in index 0d20672cee..1d38581a8e 100644 --- a/contrib/win32build/tor-mingw.nsi.in +++ b/contrib/win32build/tor-mingw.nsi.in @@ -8,7 +8,7 @@ !include "LogicLib.nsh" !include "FileFunc.nsh" !insertmacro GetParameters -!define VERSION "0.4.5.5-rc" +!define VERSION "0.4.5.5-rc-dev" !define INSTALLER "tor-${VERSION}-win32.exe" !define WEBSITE "https://www.torproject.org/" !define LICENSE "LICENSE" diff --git a/src/win32/orconfig.h b/src/win32/orconfig.h index b09506b9e9..022b05fe25 100644 --- a/src/win32/orconfig.h +++ b/src/win32/orconfig.h @@ -217,7 +217,7 @@ #define USING_TWOS_COMPLEMENT /* Version number of package */ -#define VERSION "0.4.5.5-rc" +#define VERSION "0.4.5.5-rc-dev" #define HAVE_STRUCT_SOCKADDR_IN6 #define HAVE_STRUCT_IN6_ADDR

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[tor/master] forward-port changelog from 0.4.5.5-rc
by nickm＠torproject.org 01 Feb '21

01 Feb '21

commit 732bbff29c9ffbe5d668b0679e5d01ceb2f754ba Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Feb 1 16:10:26 2021 -0500 forward-port changelog from 0.4.5.5-rc --- ChangeLog | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/ChangeLog b/ChangeLog index 44890a7b4d..e181c7dd39 100644 --- a/ChangeLog +++ b/ChangeLog @@ -1,3 +1,24 @@ +Changes in version 0.4.5.5-rc - 2021-02-01 + Tor 0.4.5.5-rc is the third release candidate in its series. We're + coming closer and closer to a stable release series. This release + fixes an annoyance with address detection code, and somewhat mitigates + an ongoing denial-of-service attack. + + We anticipate no more code changes between this and the stable + release, though of course that could change. + + o Major feature (exit): + - Re-entry into the network is now denied at the Exit level to all + relays' ORPorts and authorities' ORPorts and DirPorts. This change + should help mitgate a set of denial-of-service attacks. Closes + ticket 2667. + + o Minor bugfixes (relay, configuration): + - Don't attempt to discover our address (IPv4 or IPv6) if no ORPort + for it can be found in the configuration. Fixes bug 40254; bugfix + on 0.4.5.1-alpha. + + Changes in version 0.4.5.4-rc - 2021-01-22 Tor 0.4.5.4-rc is the second release candidate in its series. It fixes several bugs present in previous releases.

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[tor/release-0.4.5] bump to 0.4.5.5-rc-dev
by nickm＠torproject.org 01 Feb '21

01 Feb '21

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[tor/release-0.4.5] Merge branch 'maint-0.4.5' into release-0.4.5
by nickm＠torproject.org 01 Feb '21

01 Feb '21

commit 016044b95e00233677a13183f81eca3c4b9559b0 Merge: b36a00e9a9 40eeb63b5e Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Feb 1 16:14:26 2021 -0500 Merge branch 'maint-0.4.5' into release-0.4.5 configure.ac | 4 ++-- contrib/win32build/tor-mingw.nsi.in | 2 +- src/win32/orconfig.h | 2 +- 3 files changed, 4 insertions(+), 4 deletions(-)

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[translation/torbutton-aboutdialogdtd] https://gitweb.torproject.org/translation.git/commit/?h=torbutton-aboutdialogdtd
by translation＠torproject.org 01 Feb '21

01 Feb '21

commit 011bf8f0563378bb073fc569277fddae73c58259 Author: Translation commit bot <translation(a)torproject.org> Date: Mon Feb 1 20:47:34 2021 +0000 https://gitweb.torproject.org/translation.git/commit/?h=torbutton-aboutdial… --- my/aboutdialog.dtd | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/my/aboutdialog.dtd b/my/aboutdialog.dtd index 844f4e0707..8234f50375 100644 --- a/my/aboutdialog.dtd +++ b/my/aboutdialog.dtd @@ -5,7 +5,7 @@ <!ENTITY help.start "Want to help? ">  -<!ENTITY help.donateLink "Donate"> +<!ENTITY help.donateLink "လှူဒါန်း"> <!ENTITY help.or " or ">  <!ENTITY help.getInvolvedLink "get involved">

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[tpo/master] 0.4.5.5-rc is out.
by nickm＠torproject.org 01 Feb '21

01 Feb '21

commit 53aa1c3b584c3198efdc272929452042ac47e987 Author: Nick Mathewson <nickm(a)torproject.org> Date: Mon Feb 1 15:40:15 2021 -0500 0.4.5.5-rc is out. --- databags/versions.ini | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/databags/versions.ini b/databags/versions.ini index 72546801..b94d979d 100644 --- a/databags/versions.ini +++ b/databags/versions.ini @@ -15,6 +15,6 @@ version = 10.5a8 version = 0.4.4.6 [tor-alpha] -version = 0.4.5.4-rc +version = 0.4.5.5-rc

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[tor/maint-0.4.5] Merge branch 'tor-gitlab/mr/289' into maint-0.4.5
by dgoulet＠torproject.org 01 Feb '21

01 Feb '21

commit ed373eaa8de41f22c28b5c203b85342e0fc48bee Merge: 387d1d8835 627e7d6625 Author: David Goulet <dgoulet(a)torproject.org> Date: Mon Feb 1 14:09:58 2021 -0500 Merge branch 'tor-gitlab/mr/289' into maint-0.4.5 src/core/or/address_set.c | 75 ----------------------------------------- src/core/or/address_set.h | 15 --------- src/core/or/connection_edge.c | 2 +- src/feature/nodelist/nodelist.c | 63 ++++++++++++++++++++++++++-------- src/feature/nodelist/nodelist.h | 3 +- src/test/test_address_set.c | 12 +++---- 6 files changed, 57 insertions(+), 113 deletions(-) diff --cc src/core/or/connection_edge.c index 04005b29a6,27a616fa24..a33c64fe19 --- a/src/core/or/connection_edge.c +++ b/src/core/or/connection_edge.c @@@ -4290,10 -4290,10 +4290,10 @@@ connection_exit_connect(edge_connection * case of an attack so this is a small price to pay. */ if (!connection_edge_is_rendezvous_stream(edge_conn) && !network_reentry_is_allowed() && - nodelist_reentry_probably_contains(&conn->addr, conn->port)) { + nodelist_reentry_contains(&conn->addr, conn->port)) { log_info(LD_EXIT, "%s tried to connect back to a known relay address. " "Closing.", connection_describe(conn)); - connection_edge_end(edge_conn, END_STREAM_REASON_TORPROTOCOL); + connection_edge_end(edge_conn, END_STREAM_REASON_CONNECTREFUSED); circuit_detach_stream(circuit_get_by_edge_conn(edge_conn), edge_conn); connection_free(conn); return;

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[tor/maint-0.4.5] relay: Send back CONNECTION_REFUSED on reentry
by dgoulet＠torproject.org 01 Feb '21

01 Feb '21

commit 387d1d8835df1bffa71e5157c41cb856c5f18d7d Author: David Goulet <dgoulet(a)torproject.org> Date: Mon Feb 1 12:45:32 2021 -0500 relay: Send back CONNECTION_REFUSED on reentry The TORPROTOCOL reason causes the client to close the circuit which is not what we want because other valid streams might be on it. Instead, CONNECTION_REFUSED will leave it open but will not allow more streams to be attached to it. The client then open a new circuit to the destination. Closes #40270 Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- src/core/or/connection_edge.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/core/or/connection_edge.c b/src/core/or/connection_edge.c index da5431c47e..04005b29a6 100644 --- a/src/core/or/connection_edge.c +++ b/src/core/or/connection_edge.c @@ -4293,7 +4293,7 @@ connection_exit_connect(edge_connection_t *edge_conn) nodelist_reentry_probably_contains(&conn->addr, conn->port)) { log_info(LD_EXIT, "%s tried to connect back to a known relay address. " "Closing.", connection_describe(conn)); - connection_edge_end(edge_conn, END_STREAM_REASON_TORPROTOCOL); + connection_edge_end(edge_conn, END_STREAM_REASON_CONNECTREFUSED); circuit_detach_stream(circuit_get_by_edge_conn(edge_conn), edge_conn); connection_free(conn); return;

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[tor/master] node: Move reentry set to use a digestmap_t
by dgoulet＠torproject.org 01 Feb '21

01 Feb '21

commit bd4a3f64a1f6802c97a7976ff9f80495ef3ba57d Author: David Goulet <dgoulet(a)torproject.org> Date: Mon Feb 1 12:20:39 2021 -0500 node: Move reentry set to use a digestmap_t Any lookup now will be certain and not probabilistic as the bloomfilter. Closes #40269 Signed-off-by: David Goulet <dgoulet(a)torproject.org> --- src/core/or/connection_edge.c | 2 +- src/feature/nodelist/nodelist.c | 63 ++++++++++++++++++++++++++++++++--------- src/feature/nodelist/nodelist.h | 3 +- src/test/test_address_set.c | 12 ++++---- 4 files changed, 57 insertions(+), 23 deletions(-) diff --git a/src/core/or/connection_edge.c b/src/core/or/connection_edge.c index da5431c47e..27a616fa24 100644 --- a/src/core/or/connection_edge.c +++ b/src/core/or/connection_edge.c @@ -4290,7 +4290,7 @@ connection_exit_connect(edge_connection_t *edge_conn) * case of an attack so this is a small price to pay. */ if (!connection_edge_is_rendezvous_stream(edge_conn) && !network_reentry_is_allowed() && - nodelist_reentry_probably_contains(&conn->addr, conn->port)) { + nodelist_reentry_contains(&conn->addr, conn->port)) { log_info(LD_EXIT, "%s tried to connect back to a known relay address. " "Closing.", connection_describe(conn)); connection_edge_end(edge_conn, END_STREAM_REASON_TORPROTOCOL); diff --git a/src/feature/nodelist/nodelist.c b/src/feature/nodelist/nodelist.c index 6a6f277849..03b158e68d 100644 --- a/src/feature/nodelist/nodelist.c +++ b/src/feature/nodelist/nodelist.c @@ -137,7 +137,7 @@ typedef struct nodelist_t { /* Set of addresses + port that belong to nodes we know and that we don't * allow network re-entry towards them. */ - addr_port_set_t *reentry_set; + digestmap_t *reentry_set; /* The valid-after time of the last live consensus that initialized the * nodelist. We use this to detect outdated nodelists that need to be @@ -485,6 +485,42 @@ node_add_to_address_set(const node_t *node) } } +/** Build a construction for the reentry set consisting of an address and port + * pair. + * + * If the given address is _not_ AF_INET or AF_INET6, then the item is an + * array of 0s. + * + * Return a pointer to a static buffer containing the item. Next call to this + * function invalidates its previous content. */ +static char * +build_addr_port_item(const tor_addr_t *addr, const uint16_t port) +{ + /* At most 16 bytes are put in this (IPv6) and then 2 bytes for the port + * which is within the maximum of 20 bytes (DIGEST_LEN). */ + static char data[DIGEST_LEN]; + + memset(data, 0, sizeof(data)); + switch (tor_addr_family(addr)) { + case AF_INET: + memcpy(data, &addr->addr.in_addr.s_addr, 4); + break; + case AF_INET6: + memcpy(data, &addr->addr.in6_addr.s6_addr, 16); + break; + case AF_UNSPEC: + /* Leave the 0. */ + break; + default: + /* LCOV_EXCL_START */ + tor_fragile_assert(); + /* LCOV_EXCL_STOP */ + } + + memcpy(data + 16, &port, sizeof(port)); + return data; +} + /** Add the given address into the nodelist address set. */ void nodelist_add_addr_to_address_set(const tor_addr_t *addr, @@ -498,10 +534,12 @@ nodelist_add_addr_to_address_set(const tor_addr_t *addr, } address_set_add(the_nodelist->node_addrs, addr); if (or_port != 0) { - addr_port_set_add(the_nodelist->reentry_set, addr, or_port); + digestmap_set(the_nodelist->reentry_set, + build_addr_port_item(addr, or_port), (void*) 1); } if (dir_port != 0) { - addr_port_set_add(the_nodelist->reentry_set, addr, dir_port); + digestmap_set(the_nodelist->reentry_set, + build_addr_port_item(addr, dir_port), (void*) 1); } } @@ -522,7 +560,7 @@ nodelist_probably_contains_address(const tor_addr_t *addr) /** Return true if <b>addr</b> is the address of some node in the nodelist and * corresponds also to the given port. If not, probably return false. */ bool -nodelist_reentry_probably_contains(const tor_addr_t *addr, uint16_t port) +nodelist_reentry_contains(const tor_addr_t *addr, uint16_t port) { if (BUG(!addr) || BUG(!port)) return false; @@ -530,8 +568,8 @@ nodelist_reentry_probably_contains(const tor_addr_t *addr, uint16_t port) if (!the_nodelist || !the_nodelist->reentry_set) return false; - return addr_port_set_probably_contains(the_nodelist->reentry_set, - addr, port); + return digestmap_get(the_nodelist->reentry_set, + build_addr_port_item(addr, port)) != NULL; } /** Add <b>ri</b> to an appropriate node in the nodelist. If we replace an @@ -667,15 +705,12 @@ nodelist_set_consensus(const networkstatus_t *ns) get_estimated_address_per_node(); estimated_addresses += (get_n_authorities(V3_DIRINFO | BRIDGE_DIRINFO) * get_estimated_address_per_node()); + /* Clear our sets because we will repopulate them with what this new + * consensus contains. */ address_set_free(the_nodelist->node_addrs); - addr_port_set_free(the_nodelist->reentry_set); the_nodelist->node_addrs = address_set_new(estimated_addresses); - /* Times two here is for both the ORPort and DirPort. We double it again in - * order to minimize as much as possible the false positive when looking up - * this set. Reason is that Exit streams that are legitimate but end up a - * false positive against this set will thus be considered reentry and be - * rejected which means a bad UX. */ - the_nodelist->reentry_set = addr_port_set_new(estimated_addresses * 2 * 2); + digestmap_free(the_nodelist->reentry_set, NULL); + the_nodelist->reentry_set = digestmap_new(); SMARTLIST_FOREACH_BEGIN(ns->routerstatus_list, routerstatus_t *, rs) { node_t *node = node_get_or_create(rs->identity_digest); @@ -902,7 +937,7 @@ nodelist_free_all(void) address_set_free(the_nodelist->node_addrs); the_nodelist->node_addrs = NULL; - addr_port_set_free(the_nodelist->reentry_set); + digestmap_free(the_nodelist->reentry_set, NULL); the_nodelist->reentry_set = NULL; tor_free(the_nodelist); diff --git a/src/feature/nodelist/nodelist.h b/src/feature/nodelist/nodelist.h index ada0a640a1..44b8918b06 100644 --- a/src/feature/nodelist/nodelist.h +++ b/src/feature/nodelist/nodelist.h @@ -35,8 +35,7 @@ node_t *nodelist_add_microdesc(microdesc_t *md); void nodelist_set_consensus(const networkstatus_t *ns); void nodelist_ensure_freshness(const networkstatus_t *ns); int nodelist_probably_contains_address(const tor_addr_t *addr); -bool nodelist_reentry_probably_contains(const tor_addr_t *addr, - uint16_t port); +bool nodelist_reentry_contains(const tor_addr_t *addr, uint16_t port); void nodelist_add_addr_to_address_set(const tor_addr_t *addr, uint16_t or_port, uint16_t dir_port); diff --git a/src/test/test_address_set.c b/src/test/test_address_set.c index 55a0b106d2..a73fbab76a 100644 --- a/src/test/test_address_set.c +++ b/src/test/test_address_set.c @@ -215,8 +215,8 @@ test_exit_no_reentry(void *arg) nodelist_set_consensus(dummy_ns); /* The address set is empty. Try it anyway */ - tt_assert(!nodelist_reentry_probably_contains(&addr_v4, 244)); - tt_assert(!nodelist_reentry_probably_contains(&addr_v6, 244)); + tt_assert(!nodelist_reentry_contains(&addr_v4, 244)); + tt_assert(!nodelist_reentry_contains(&addr_v6, 244)); /* Now let's populate the network */ md = tor_malloc_zero(sizeof(*md)); @@ -243,12 +243,12 @@ test_exit_no_reentry(void *arg) /* First let's try an address that is on the no-reentry list, but with a different port */ - tt_assert(!nodelist_reentry_probably_contains(&addr_v4, 666)); - tt_assert(!nodelist_reentry_probably_contains(&addr_v6, 444)); + tt_assert(!nodelist_reentry_contains(&addr_v4, 666)); + tt_assert(!nodelist_reentry_contains(&addr_v6, 444)); /* OK now let's try with the right address and right port */ - tt_assert(nodelist_reentry_probably_contains(&addr_v4, 444)); - tt_assert(nodelist_reentry_probably_contains(&addr_v6, 666)); + tt_assert(nodelist_reentry_contains(&addr_v4, 444)); + tt_assert(nodelist_reentry_contains(&addr_v6, 666)); done: routerstatus_free(rs); routerinfo_free(ri); microdesc_free(md);

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tor-commits February 2021