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@@ -3,6 +3,127 @@ This document summarizes new features and bugfixes in each stable release
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of Tor. If you want to see more detailed descriptions of the changes in
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each development snapshot, see the ChangeLog file.
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+Changes in version 0.2.0.33 - 2009-01-21
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+ Tor 0.2.0.33 fixes a variety of bugs that were making relays less
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+ useful to users. It also finally fixes a bug where a relay or client
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+ that's been off for many days would take a long time to bootstrap.
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+
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+ This update also fixes an important security-related bug reported by
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+ Ilja van Sprundel. You should upgrade. (We'll send out more details
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+ about the bug once people have had some time to upgrade.)
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+
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+ o Security fixes:
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+ - Fix a heap-corruption bug that may be remotely triggerable on
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+ some platforms. Reported by Ilja van Sprundel.
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+
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+ o Major bugfixes:
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+ - When a stream at an exit relay is in state "resolving" or
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+ "connecting" and it receives an "end" relay cell, the exit relay
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+ would silently ignore the end cell and not close the stream. If
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+ the client never closes the circuit, then the exit relay never
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+ closes the TCP connection. Bug introduced in Tor 0.1.2.1-alpha;
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+ reported by "wood".
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+ - When sending CREATED cells back for a given circuit, use a 64-bit
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+ connection ID to find the right connection, rather than an addr:port
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+ combination. Now that we can have multiple OR connections between
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+ the same ORs, it is no longer possible to use addr:port to uniquely
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+ identify a connection.
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+ - Bridge relays that had DirPort set to 0 would stop fetching
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+ descriptors shortly after startup, and then briefly resume
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+ after a new bandwidth test and/or after publishing a new bridge
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+ descriptor. Bridge users that try to bootstrap from them would
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+ get a recent networkstatus but would get descriptors from up to
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+ 18 hours earlier, meaning most of the descriptors were obsolete
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+ already. Reported by Tas; bugfix on 0.2.0.13-alpha.
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+ - Prevent bridge relays from serving their 'extrainfo' document
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+ to anybody who asks, now that extrainfo docs include potentially
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+ sensitive aggregated client geoip summaries. Bugfix on
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+ 0.2.0.13-alpha.
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+ - If the cached networkstatus consensus is more than five days old,
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+ discard it rather than trying to use it. In theory it could be
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+ useful because it lists alternate directory mirrors, but in practice
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+ it just means we spend many minutes trying directory mirrors that
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+ are long gone from the network. Also discard router descriptors as
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+ we load them if they are more than five days old, since the onion
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+ key is probably wrong by now. Bugfix on 0.2.0.x. Fixes bug 887.
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+
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+ o Minor bugfixes:
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+ - Do not mark smartlist_bsearch_idx() function as ATTR_PURE. This bug
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+ could make gcc generate non-functional binary search code. Bugfix
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+ on 0.2.0.10-alpha.
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+ - Build correctly on platforms without socklen_t.
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+ - Compile without warnings on solaris.
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+ - Avoid potential crash on internal error during signature collection.
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+ Fixes bug 864. Patch from rovv.
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+ - Correct handling of possible malformed authority signing key
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+ certificates with internal signature types. Fixes bug 880.
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+ Bugfix on 0.2.0.3-alpha.
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+ - Fix a hard-to-trigger resource leak when logging credential status.
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+ CID 349.
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+ - When we can't initialize DNS because the network is down, do not
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+ automatically stop Tor from starting. Instead, we retry failed
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+ dns_init() every 10 minutes, and change the exit policy to reject
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+ *:* until one succeeds. Fixes bug 691.
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+ - Use 64 bits instead of 32 bits for connection identifiers used with
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+ the controller protocol, to greatly reduce risk of identifier reuse.
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+ - When we're choosing an exit node for a circuit, and we have
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+ no pending streams, choose a good general exit rather than one that
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+ supports "all the pending streams". Bugfix on 0.1.1.x. Fix by rovv.
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+ - Fix another case of assuming, when a specific exit is requested,
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+ that we know more than the user about what hosts it allows.
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+ Fixes one case of bug 752. Patch from rovv.
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+ - Clip the MaxCircuitDirtiness config option to a minimum of 10
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+ seconds. Warn the user if lower values are given in the
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+ configuration. Bugfix on 0.1.0.1-rc. Patch by Sebastian.
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+ - Clip the CircuitBuildTimeout to a minimum of 30 seconds. Warn the
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+ user if lower values are given in the configuration. Bugfix on
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+ 0.1.1.17-rc. Patch by Sebastian.
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+ - Fix a memory leak when we decline to add a v2 rendezvous descriptor to
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+ the cache because we already had a v0 descriptor with the same ID.
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+ Bugfix on 0.2.0.18-alpha.
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+ - Fix a race condition when freeing keys shared between main thread
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+ and CPU workers that could result in a memory leak. Bugfix on
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+ 0.1.0.1-rc. Fixes bug 889.
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+ - Send a valid END cell back when a client tries to connect to a
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+ nonexistent hidden service port. Bugfix on 0.1.2.15. Fixes bug
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+ 840. Patch from rovv.
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+ - Check which hops rendezvous stream cells are associated with to
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+ prevent possible guess-the-streamid injection attacks from
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+ intermediate hops. Fixes another case of bug 446. Based on patch
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+ from rovv.
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+ - If a broken client asks a non-exit router to connect somewhere,
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+ do not even do the DNS lookup before rejecting the connection.
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+ Fixes another case of bug 619. Patch from rovv.
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+ - When a relay gets a create cell it can't decrypt (e.g. because it's
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+ using the wrong onion key), we were dropping it and letting the
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+ client time out. Now actually answer with a destroy cell. Fixes
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+ bug 904. Bugfix on 0.0.2pre8.
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+
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+ o Minor bugfixes (hidden services):
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+ - Do not throw away existing introduction points on SIGHUP. Bugfix on
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+ 0.0.6pre1. Patch by Karsten. Fixes bug 874.
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+
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+ o Minor features:
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+ - Report the case where all signatures in a detached set are rejected
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+ differently than the case where there is an error handling the
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+ detached set.
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+ - When we realize that another process has modified our cached
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+ descriptors, print out a more useful error message rather than
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+ triggering an assertion. Fixes bug 885. Patch from Karsten.
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+ - Implement the 0x20 hack to better resist DNS poisoning: set the
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+ case on outgoing DNS requests randomly, and reject responses that do
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+ not match the case correctly. This logic can be disabled with the
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+ ServerDNSRamdomizeCase setting, if you are using one of the 0.3%
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+ of servers that do not reliably preserve case in replies. See
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+ "Increased DNS Forgery Resistance through 0x20-Bit Encoding"
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+ for more info.
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+ - Check DNS replies for more matching fields to better resist DNS
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+ poisoning.
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+ - Never use OpenSSL compression: it wastes RAM and CPU trying to
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+ compress cells, which are basically all encrypted, compressed, or
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+ both.
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+
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+
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Changes in version 0.2.0.32 - 2008-11-20
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Tor 0.2.0.32 fixes a major security problem in Debian and Ubuntu
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packages (and maybe other packages) noticed by Theo de Raadt, fixes
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Roger Dingledine