1 Bitcoin Core version 0.10.3 is now available from:
3 <https://bitcoin.org/bin/bitcoin-core-0.10.3/>
5 This is a new minor version release, bringing security fixes and translation
6 updates. It is recommended to upgrade to this version as soon as possible.
8 Please report bugs using the issue tracker at github:
10 <https://github.com/bitcoin/bitcoin/issues>
12 Upgrading and downgrading
13 =========================
18 If you are running an older version, shut it down. Wait until it has completely
19 shut down (which might take a few minutes for older versions), then run the
20 installer (on Windows) or just copy over /Applications/Bitcoin-Qt (on Mac) or
21 bitcoind/bitcoin-qt (on Linux).
26 Because release 0.10.0 and later makes use of headers-first synchronization and
27 parallel block download (see further), the block files and databases are not
28 backwards-compatible with pre-0.10 versions of Bitcoin Core or other software:
30 * Blocks will be stored on disk out of order (in the order they are
31 received, really), which makes it incompatible with some tools or
32 other programs. Reindexing using earlier versions will also not work
33 anymore as a result of this.
35 * The block index database will now hold headers for which no block is
36 stored on disk, which earlier versions won't support.
38 If you want to be able to downgrade smoothly, make a backup of your entire data
39 directory. Without this your node will need start syncing (or importing from
40 bootstrap.dat) anew afterwards. It is possible that the data from a completely
41 synchronised 0.10 node may be usable in older versions as-is, but this is not
42 supported and may break as soon as the older version attempts to reindex.
44 This does not affect wallet forward or backward compatibility.
49 Fix buffer overflow in bundled upnp
50 ------------------------------------
52 Bundled miniupnpc was updated to 1.9.20151008. This fixes a buffer overflow in
53 the XML parser during initial network discovery.
55 Details can be found here: http://talosintel.com/reports/TALOS-2015-0035/
57 This applies to the distributed executables only, not when building from source or
58 using distribution provided packages.
60 Additionally, upnp has been disabled by default. This may result in a lower
61 number of reachable nodes on IPv4, however this prevents future libupnpc
62 vulnerabilities from being a structural risk to the network
63 (see https://github.com/bitcoin/bitcoin/pull/6795).
65 Test for LowS signatures before relaying
66 -----------------------------------------
68 Make the node require the canonical 'low-s' encoding for ECDSA signatures when
69 relaying or mining. This removes a nuisance malleability vector.
71 Consensus behavior is unchanged.
73 If widely deployed this change would eliminate the last remaining known vector
74 for nuisance malleability on SIGHASH_ALL P2PKH transactions. On the down-side
75 it will block most transactions made by sufficiently out of date software.
77 Unlike the other avenues to change txids on transactions this
78 one was randomly violated by all deployed bitcoin software prior to
79 its discovery. So, while other malleability vectors where made
80 non-standard as soon as they were discovered, this one has remained
81 permitted. Even BIP62 did not propose applying this rule to
82 old version transactions, but conforming implementations have become
83 much more common since BIP62 was initially written.
85 Bitcoin Core has produced compatible signatures since a28fb70e in
86 September 2013, but this didn't make it into a release until 0.9
87 in March 2014; Bitcoinj has done so for a similar span of time.
88 Bitcoinjs and electrum have been more recently updated.
90 This does not replace the need for BIP62 or similar, as miners can
91 still cooperate to break transactions. Nor does it replace the
92 need for wallet software to handle malleability sanely[1]. This
93 only eliminates the cheap and irritating DOS attack.
95 [1] On the Malleability of Bitcoin Transactions
96 Marcin Andrychowicz, Stefan Dziembowski, Daniel Malinowski, Łukasz Mazurek
97 http://fc15.ifca.ai/preproceedings/bitcoin/paper_9.pdf
99 Minimum relay fee default increase
100 -----------------------------------
102 The default for the `-minrelaytxfee` setting has been increased from `0.00001`
105 This is necessitated by the current transaction flooding, causing
106 outrageous memory usage on nodes due to the mempool ballooning. This is a
107 temporary measure, bridging the time until a dynamic method for determining
108 this fee is merged (which will be in 0.12).
110 (see https://github.com/bitcoin/bitcoin/pull/6793, as well as the 0.11.0
111 release notes, in which this value was suggested)
116 Detailed release notes follow. This overview includes changes that affect external
117 behavior, not code moves, refactors or string updates.
119 - #6186 `e4a7d51` Fix two problems in CSubnet parsing
120 - #6153 `ebd7d8d` Parameter interaction: disable upnp if -proxy set
121 - #6203 `ecc96f5` Remove P2SH coinbase flag, no longer interesting
122 - #6226 `181771b` json: fail read_string if string contains trailing garbage
123 - #6244 `09334e0` configure: Detect (and reject) LibreSSL
124 - #6276 `0fd8464` Fix getbalance * 0
125 - #6274 `be64204` Add option `-alerts` to opt out of alert system
126 - #6319 `3f55638` doc: update mailing list address
127 - #6438 `7e66e9c` openssl: avoid config file load/race
128 - #6439 `255eced` Updated URL location of netinstall for Debian
129 - #6412 `0739e6e` Test whether created sockets are select()able
130 - #6694 `f696ea1` [QT] fix thin space word wrap line brake issue
131 - #6704 `743cc9e` Backport bugfixes to 0.10
132 - #6769 `1cea6b0` Test LowS in standardness, removes nuisance malleability vector.
133 - #6789 `093d7b5` Update miniupnpc to 1.9.20151008
134 - #6795 `f2778e0` net: Disable upnp by default
135 - #6797 `91ef4d9` Do not store more than 200 timedata samples
136 - #6793 `842c48d` Bump minrelaytxfee default
141 Thanks to everyone who directly contributed to this release:
158 - Wladimir J. van der Laan
160 And all those who contributed additional code review and/or security research:
162 - timothy on IRC for reporting the issue
163 - Vulnerability in miniupnp discovered by Aleksandar Nikolic of Cisco Talos
165 As well as everyone that helped translating on [Transifex](https://www.transifex.com/projects/p/bitcoin/).