[exim-cvs] update Changelog about security fixes

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Συντάκτης: Exim Git Commits Mailing List
Ημερομηνία:  
Προς: exim-cvs
Αντικείμενο: [exim-cvs] update Changelog about security fixes
Gitweb: https://git.exim.org/exim.git/commitdiff/b9e0b12d9b665bbff996382264d4ba97d1a61efd
Commit:     b9e0b12d9b665bbff996382264d4ba97d1a61efd
Parent:     ccf9816f54fb04ab5508eb8c7f00b08bc3531297
Author:     Heiko Schlittermann (HS12-RIPE) <hs@???>
AuthorDate: Sat Sep 30 22:52:59 2023 +0200
Committer:  Heiko Schlittermann (HS12-RIPE) <hs@???>
CommitDate: Sat Sep 30 22:52:59 2023 +0200


    update Changelog about security fixes
---
 doc/doc-txt/ChangeLog | 201 +++-----------------------------------------------
 1 file changed, 9 insertions(+), 192 deletions(-)


diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index e1402eae0..8c5b7fd9c 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -2,205 +2,22 @@ This document describes *changes* to previous versions, that might
affect Exim's operation, with an unchanged configuration file. For new
options, and new features, see the NewStuff file next to this ChangeLog.

-Exim version 4.97
------------------
-
-JH/01 The hosts_connection_nolog main option now also controls "no MAIL in
-      SMTP connection" log lines.
-
-JH/02 Option default value updates:
-    - queue_fast_ramp (main)    true (was false)
-    - remote_max_parallel (main)    4 (was 2)
-
-JH/03 Cache static regex pattern compilations, for use by ACLs.
-
-JH/04 Bug 2903: avoid exit on an attempt to rewrite a malformed address.
-      Make the rewrite never match and keep the logging.  Trust the
-      admin to be using verify=header-syntax (to actually reject the message).
-
-JH/05 Follow symlinks for placing a watch on TLS creds files.  This means
-      (under Linux) we watch the dir containing the final file; previously
-      it would be the dir with the first symlink.  We still do not monitor
-      the entire path.
-
-JH/06 Check for bad chars in rDNS for sender_host_name.  The OpenBSD (at least)
-      dn_expand() is happy to pass them through.
-
-JH/07 OpenSSL Fix auto-reload of changed server OCSP proof.  Previously, if
-      the file with the proof had an unchanged name, the new proof(s) were
-      loaded on top of the old ones (and nover used; the old ones were stapled).
-
-JH/08 Bug 2915: Fix use-after-free for $regex<n> variables. Previously when
-      more than one message arrived in a single connection a reference from
-      the earlier message could be re-used.  Often a sigsegv resulted.
-      These variables were introduced in Exim 4.87.
-      Debug help from Graeme Fowler.
-
-JH/09 Fix ${filter } for conditions that modify $value.  Previously the
-      modified version would be used in construction the result, and a memory
-      error would occur.
-
-JH/10 GnuTLS: fix for (IOT?) clients offering no TLS extensions at all.
-      Find and fix by Jasen Betts.
-
-JH/11 OpenSSL: fix for ancient clients needing TLS support for versions earlier
-      than TLSv1,2,  Previously, more-recent versions of OpenSSL were permitting
-      the systemwide configuration to override the Exim config.
-
-HS/01 Bug 2728: Introduce EDITME option "DMARC_API" to work around incompatible
-      API changes in libopendmarc.
-
-JH/12 Bug 2930: Fix daemon startup.  When started from any process apart from
-      pid 1, in the normal "background daemon" mode, having to drop process-
-      group leadership also lost track of needing to create listener sockets.
-
-JH/13 Bug 2929: Fix using $recipients after ${run...}.  A change made for 4.96
-      resulted in the variable appearing empty.  Find and fix by Ruben Jenster.
-
-JH/14 Bug 2933: Fix regex substring match variables for null matches. Since 4.96
-      a capture group which obtained no text (eg. "(abc)*" matching zero
-      occurrences) could cause a segfault if the corresponding $<n> was
-      expanded.
+Exim version 4.96.1
+-------------------


-JH/15 Fix argument parsing for ${run } expansion. Previously, when an argument
-      included a close-brace character (eg. it itself used an expansion) an
-      error occurred.
-
-JH/16 Move running the smtp connect ACL to before, for TLS-on-connect ports,
-      starting TLS.  Previously it was after, meaning that attackers on such
-      ports had to be screened using the host_reject_connection main config
-      option. The new sequence aligns better with the STARTTLS behaviour, and
-      permits defences against crypto-processing load attacks, even though it
-      is strictly an incompatible change.
-      Also, avoid sending any SMTP fail response for either the connect ACL
-      or host_reject_connection, for TLS-on-connect ports.
-
-JH/17 Permit the ACL "encrypted" condition to be used in a HELO/EHLO ACL,
-      Previously this was not permitted, but it makes reasonable sense.
-      While there, restore a restriction on using it from a connect ACL; given
-      the change JH/16 it could only return false (and before 4.91 was not
-      permitted).
-
-JH/18 Fix a fencepost error in logging.  Previously (since 4.92) when a log line
-      was exactly sized compared to the log buffer, a crash occurred with the
-      misleading message "bad memory reference; pool not found".
-      Found and traced by Jasen Betts.
-
-JH/19 Bug 2911: Fix a recursion in DNS lookups.  Previously, if the main option
-      dns_again_means_nonexist included an element causing a DNS lookup which
-      iteslf returned DNS_AGAIN, unbounded recursion occurred.  Possible results
-      included (though probably not limited to) a process crash from stack
-      memory limit, or from excessive open files.  Replace this with a paniclog
-      whine (as this is likely a configuration error), and returning
-      DNS_NOMATCH.
-
-JH/20 Bug 2954: (OpenSSL) Fix setting of explicit EC curve/group.  Previously
-      this always failed, probably leading to the usual downgrade to in-clear
-      connections.
+This is a security release.


-JH/21 Fix TLSA lookups.  Previously dns_again_means_nonexist would affect
-      SERVFAIL results, which breaks the downgrade resistance of DANE.  Change
-      to not checking that list for these lookups.
-
-JH/22 Bug 2434: Add connection-elapsed "D=" element to more connection
-      closure log lines.
-
-JH/23 Fix crash in string expansions. Previously, if an empty variable was
-      immediately followed by an expansion operator, a null-indirection read
-      was done, killing the process.
-
-JH/24 Bug 2997: When built with EXPERIMENTAL_DSN_INFO, bounce messages can
-      include an SMTP response string which is longer than that supported
-      by the delivering transport.  Alleviate by wrapping such lines before
-      column 80.
-
-JH/25 Bug 2827: Restrict size of References: header in bounce messages to 998
-      chars (RFC limit).  Previously a limit of 12 items was made, which with
-      a not-impossible References: in the message being bounced could still
-      be over-large and get stopped in the transport.
-
-JH/26 For a ${readsocket } in TLS mode, send a TLS Close Alert before the TCP
-      close.  Previously a bare socket close was done.
-
-JH/27 Fix ${srs_encode ..}.  Previously it would give a bad result for one day
-      every 1024 days.
-
-JH/28 Bug 2996: Fix a crash in the smtp transport.  When finding that the
-      message being considered for delivery was already being handled by
-      another process, and having an SMTP connection already open, the function
-      to close it tried to use an uninitialized variable.  This would afftect
-      high-volume sites more, especially when running mailing-list-style loads.
-      Pollution of logs was the major effect, as the other process delivered
-      the message.  Found and partly investigated by Graeme Fowler.
-
-JH/29 Change format of the internal ID used for message identification. The old
-      version only supported 31 bits for a PID element; the new 64 (on systems
-      which can use Base-62 encoding, which is all currently supported ones
-      but not Darwin (MacOS) or Cygwin, which have case-insensitive filesystems
-      and must use Base-36).  The new ID is 23 characters rather than 16, and is
-      visible in various places - notably logs, message headers, and spool file
-      names.  Various of the ancillary utilities also have to know the format.
-    As well as the expanded PID portion, the sub-second part of the time
-      recorded in the ID is expanded to support finer precision.  Theoretically
-      this permits a receive rate from a single comms channel of better than the
-      previous 2000/sec.
-        The major timestamp part of the ID is not changed; at 6 characters it is
-      usable until about year 3700.
-        Updating from previously releases is fully supported: old-format spool
-      files are still usable, and the utilities support both formats.  New
-      message will use the new format.  The one hints-DB file type which uses
-      message-IDs (the transport wait- DB) will be discarded if an old-format ID
-      is seen; new ones will be built with only new-format IDs.
-      Optionally, a utility can be used to convert spool files from old to new,
-      but this is only an efficiency measure not a requirement for operation
-        Downgrading from new to old requires running a provided utility, having
-      first stopped all operations.  This will convert any spool files from new
-      back to old (losing time-precision and PID information) and remove any
-      wait- hints databases.
-
-JH/30 Bug 3006: Fix handling of JSON strings having embedded commas. Previously
-      we treated them as item separators when parsing for a list item, but they
-      need to be protected by the doublequotes.  While there, add handling for
-      backslashes.
-
-JH/31 Bug 2998: Fix ${utf8clean:...} to disallow UTF-16 surrogate codepoints.
-      Found and fixed by Jasen Betts. No testcase for this as my usual text
-      editor insists on emitting only valid UTF-8.
-
-JH/32 Fix "tls_dhparam = none" under GnuTLS.  At least with 3.7.9 this gave
-      a null-indirection SIGSEGV for the receive process.
-
-JH/33 Fix free for live variable $value created by a ${run ...} expansion during
-      -bh use.  Internal checking would spot this and take a panic.
-
-JH/34 Bug 3013: Fix use of $recipients within arguments for ${run...}.
-      In 4.96 this would expand to empty.
-
-JH/35 Bug 3014: GnuTLS: fix expiry date for an auto-generated server
-      certificate.  Find and fix by Andreas Metzler.
-
-JH/36 Add ARC info to DMARC hostory records.
-
-JH/37 Bug 3016: Avoid sending DSN when message was accepted under fakereject
-      or fakedefer.  Previously the sender could discover that the message
-      had in fact been accepted.
-
-JH/38 Taint-track intermediate values from the peer in multi-stage authentation
-      sequences.  Previously the input was not noted as being tainted; notably
-      this resulted in behaviour of LOGIN vs. PLAIN being inconsistent under
-      bad coding of authenticators.
-
-JH/39 Bug 3023: Fix crash induced by some combinations of zero-length strings
-      and ${tr...}.  Found and diagnosed by Heiko Schlichting.
-
-JH/40 Bug 2999: Fix a possible OOB write in the external authenticator, which
+JH/01 Bug 2999: Fix a possible OOB write in the external authenticator, which
       could be triggered by externally-supplied input.  Found by Trend Micro.
+      CVE-2023-42115


-JH/41 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
+JH/02 Bug 3000: Fix a possible OOB write in the SPA authenticator, which could
       be triggered by externally-controlled input.  Found by Trend Micro.
+      CVE-2023-42116


-JH/42 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
+JH/03 Bug 3001: Fix a possible OOB read in the SPA authenticator, which could
       be triggered by externally-controlled input.  Found by Trend Micro.
+      CVE-2023-42114



Exim version 4.96

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