Chunking: do not treat the first lonely dot special. CVE-2017-16944, Bug 2201

[exim.git] / doc / doc-txt / ChangeLog

diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index 156a89f168d4baefa673622d9b73cbd282f1d563..541ebaf544b8998cd59712d0b5135d9032969429 100644 (file)
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -5,8 +5,71 @@ affect Exim's operation, with an unchanged configuration file.  For new
 options, and new features, see the NewStuff file next to this ChangeLog.
 
 
 options, and new features, see the NewStuff file next to this ChangeLog.
 
 

+Exim version 4.89+fixes
+-----------------------
+Cherry-Picked from the master development branch
+-------------------------------------------------
+
+HS/01 Cleanup, prevent repeated use of -p/-oMr (CVE-2017-1000369)
+
+JH/06 Default openssl_options to include +no_ticket, to reduce load on peers.
+      Disable the session-cache too, which might reduce our load.  Since we
+      currrectly use a new context for every connection, both as server and
+      client, there is no benefit for these.
+      GnuTLS appears to not support tickets server-side by default (we don't
+      call gnutls_session_ticket_enable_server()) but client side is enabled
+      by default on recent versions (3.1.3 +) unless the PFS priority string
+      is used (3.2.4 +).
+
+JH/07 Fix smtp transport use of limited max_rcpt under mua_wrapper. Previously
+      the check for any unsuccessful recipients did not notice the limit, and
+      erroneously found still-pending ones.
+
+JH/19 Bug 2141: Use the full-complex API for Berkeley DB rather than the legacy-
+      compatible one, to avoid the (poorly documented) possibility of a config
+      file in the working directory redirecting the DB files, possibly correpting
+      some existing file.  CVE-2017-10140 assigned for BDB.
+
+JH/20 Bug 2147: Do not defer for a verify-with-callout-and-random which is not
+      cache-hot.  Previously, although the result was properly cached, the
+      initial verify call returned a defer.
+
+JH/21 Bug 2151 (partial):
+                Avoid using SIZE on the MAIL for a callout verify, on any but
+      the main verify for receipient in uncached-mode.
+
+JH/26 Fix DKIM bug: when the pseudoheader generated for signing was exactly
+      the right size to place the terminating semicolon on its own folded
+      line, the header hash was calculated to an incorrect value thanks to
+      the (relaxed) space the fold became.
+
+JH/27 Fix SOCKS bug: an unitialized pointer was deref'd by the transport process
+      which could crash as a result.  This could lead to undeliverable messages.
+
+JH/15 Fix a crash in the smtp transport caused when two hosts in succession
+      are unsuable for non-message-specific reasons - eg. connection timeout,
+      banner-time rejection.
+
+JH/29 Fix queue_run_in_order to ignore the PID portion of the message ID.  This
+      matters on fast-turnover and PID-randomising systems, which were getting
+      out-of-order delivery.
+
+JH/30 Fix a logging bug on aarch64: an unsafe routine was previously used for
+      a possibly-overlapping copy.  The symptom was that "Remote host closed
+      connection in response to HELO" was logged instead of the actual 4xx
+      error for the HELO.
+
+JH/34 Bug 2199: fix a use-after-free while reading smtp input for header lines.
+      A crafted sequence of BDAT commands could result in in-use memory beeing
+      freed.  CVE-2017-16943.
+
+HS/03 Bug 2201: Fix checking for leading-dot on a line during headers reading
+      from SMTP input.  Previously it was always done; now only done for DATA
+      and not BDAT commands.  CVE-2017-16944.
+
+

 Exim version 4.89
 Exim version 4.89

--------------------
+-----------------

 
 JH/01 Bug 1922: Support IDNA2008.  This has slightly different conversion rules
       than -2003 did; needs libidn2 in addition to libidn.
 
 JH/01 Bug 1922: Support IDNA2008.  This has slightly different conversion rules
       than -2003 did; needs libidn2 in addition to libidn.


@@ -45,6 +108,74 @@ JH/08 Bug 2016: Fix DKIM verification vs. CHUNKING.  Any BDAT commands after
       processing; with most chunk sizes in use this resulted in an incorrect
       body hash calculated value.
 
       processing; with most chunk sizes in use this resulted in an incorrect
       body hash calculated value.
 

+JH/09 Bug 2014: permit inclusion of a DKIM-Signature header in a received
+      DKIM signature block, for verification.  Although advised against by
+      standards it is specifically not ruled illegal.
+
+JH/10 Bug 2025: Fix reception of (quoted) local-parts with embedded spaces.
+
+JH/11 Bug 2029: Fix crash in DKIM verification when a message signature block is
+      missing a body hash (the bh= tag).
+
+JH/12 Bug 2018: Re-order Proxy Protocol startup versus TLS-on-connect startup.
+      It seems that HAProxy sends the Proxy Protocol information in clear and
+      only then does a TLS startup, so do the same.
+
+JH/13 Bug 2027: Avoid attempting to use TCP Fast Open for non-transport client
+      TCP connections (such as for Spamd) unless the daemon successfully set
+      Fast Open mode on its listening sockets.  This fixes breakage seen on
+      too-old kernels or those not configured for Fast Open, at the cost of
+      requiring both directions being enabled for TFO, and TFO never being used
+      by non-daemon-related Exim processes.
+
+JH/14 Bug 2000: Reject messages recieved with CHUNKING but with malformed line
+      endings, at least on the first header line.  Try to canonify any that get
+      past that check, despite the cost.
+
+JH/15 Angle-bracket nesting (an error inserted by broken sendmails) levels are
+      now limited to an arbitrary five deep, while parsing addresses with the
+      strip_excess_angle_brackets option enabled.
+
+PP/03 Bug 2018: For Proxy Protocol and TLS-on-connect, do not over-read and
+      instead leave the unprompted TLS handshake in socket buffer for the
+      TLS library to consume.
+
+PP/04 Bug 2018: Also handle Proxy Protocol v2 safely.
+
+PP/05 FreeBSD compat: handle that Ports no longer create /usr/bin/perl
+
+JH/16 Drop variables when they go out of scope.  Memory management drops a whole
+      region in one operation, for speed, and this leaves assigned pointers
+      dangling.  Add checks run only under the testsuite which checks all
+      variables at a store-reset and panics on a dangling pointer; add code
+      explicitly nulling out all the variables discovered.  Fixes one known
+      bug: a transport crash, where a dangling pointer for $sending_ip_address
+      originally assigned in a verify callout, is re-used.
+
+PP/06 Drop '.' from @INC in various Perl scripts.
+
+PP/07 Switch FreeBSD iconv to always use the base-system libc functions.
+
+PP/08 Reduce a number of compilation warnings under clang; building with
+      CC=clang CFLAGS+=-Wno-dangling-else -Wno-logical-op-parentheses
+      should be warning-free.
+
+JH/17 Fix inbound CHUNKING when DKIM disabled at runtime.
+
+HS/01 Fix portability problems introduced by PP/08 for platforms where
+      realloc(NULL) is not equivalent to malloc() [SunOS et al].
+
+HS/02 Bug 1974: Fix missing line terminator on the last received BDAT
+      chunk. This allows us to accept broken chunked messages. We need a more
+      general solution here.
+
+PP/09 Wrote util/chunking_fixqueue_finalnewlines.pl to help recover
+      already-broken messages in the queue.
+
+JH/18 Bug 2061: Fix ${extract } corrupting an enclosing ${reduce }  $value.
+
+JH/19 Fix reference counting bug in routing-generated-address tracking.
+

 
 Exim version 4.88
 -----------------
 
 Exim version 4.88
 -----------------