openSUSE Security Update : exim (openSUSE-SU-2014:0983-1)

This script is Copyright (C) 2014 Tenable Network Security, Inc.


Synopsis :

The remote openSUSE host is missing a security update.

Description :

Changes in exim :

- Silence static checkers; (beo#1506).

- update to 4.83 This release of Exim includes one
incompatible fix :

+ the behavior of expansion of arguments to math
comparison functions (<, <=, =, =>, >) was unexpected,
expanding the values twice; CVE-2014-2972; (bnc#888520)
This release contains the following enhancements and
bugfixes :

+ PRDR was promoted from Experimental to mainline

+ OCSP Stapling was promoted from Experimental to mainline

+ new Experimental feature Proxy Protocol

+ new Experimental feature DSN (Delivery Status
Notifications)

+ TLS session improvements

+ TLS SNI fixes

+ LDAP enhancements

+ DMARC fixes (previous CVE-2014-2957) and new
$dmarc_domain_policy

+ several new operations (listextract, utf8clean, md5,
sha1)

+ enforce header formatting with verify=header_names_ascii

+ new commandline option -oMm

+ new TLSA dns lookup

+ new malware 'sock' type

+ cutthrough routing enhancements

+ logging enhancements

+ DNSSEC enhancements

+ exiqgrep enhancements

+ deprecating non-standard SPF results

+ build and portability fixes

+ documentation fixes and enhancements

- Verify source tar ball gpg signature.

- Refresh exim-enable_ecdh_openssl.patch and strip version
number from the patch filename.

- exim482-enable_ecdh_openssl.patch: Enable ECDH (elliptic
curve diffie hellman) support, taken from
http://bugs.exim.org/show_bug.cgi?id=1397

- BuildRequire libopenssl-devel only on SUSE systems.

- Fix suse_version condition of the pre- and postun
scriptlets.

- Call service_add_pre from pre scriptlet on post-12.2
systems.

- update to 4.82

- Add -bI: framework, and -bI:sieve for querying sieve
capabilities.

- Make -n do something, by making it not do something.
When combined with -bP, the name of an option is not
output.

- Added tls_dh_min_bits SMTP transport driver option, only
honoured by GnuTLS.

- First step towards DNSSEC, provide $sender_host_dnssec
for $sender_host_name and config options to manage this,
and basic check routines.

- DSCP support for outbound connections and control
modifier for inbound.

- Cyrus SASL: set local and remote IP;port properties for
driver. (Only plugin which currently uses this is
kerberos4, which nobody should be using, but we should
make it available and other future plugins might
conceivably use it, even though it would break NAT;
stuff *should* be using channel bindings instead).

- Handle 'exim -L <tag>' to indicate to use syslog with
tag as the process name; added for Sendmail
compatibility; requires admin caller. Handle -G as
equivalent to 'control = suppress_local_fixups' (we used
to just ignore it); requires trusted caller. Also parse
but ignore: -Ac -Am -X<logfile> Bugzilla 1117.

- Bugzilla 1258 - Refactor MAIL FROM optional args
processing.

- Add +smtp_confirmation as a default logging option.

- Bugzilla 198 - Implement remove_header ACL modifier.

- Bugzilla 1197, 1281, 1283 - Spec typo.

- Bugzilla 1290 - Spec grammar fixes.

- Bugzilla 1285 - Spec omission, fix docbook errors for
spec.txt creation.

- Add Experimental DMARC support using libopendmarc
libraries.

- Fix an out of order global option causing a segfault.
Reported to dev mailing list by by Dmitry Isaikin.

- Bugzilla 1201 & 304 - New cutthrough-delivery feature,
with TLS support.

- Support 'G' suffix to numbers in ${if comparisons.

- Handle smtp transport tls_sni option forced-fail for
OpenSSL.

- Bugzilla 1196 - Spec examples corrections

- Add expansion operators ${listnamed:name} and
${listcount:string}

- Add gnutls_allow_auto_pkcs11 option (was originally
called gnutls_enable_pkcs11, but renamed to more
accurately indicate its function.

- Let Linux makefile inherit CFLAGS/CFLAGS_DYNAMIC. Pulled
from Debian 30_dontoverridecflags.dpatch by Andreas
Metzler.

- Add expansion item ${acl {name}{arg}...}, expansion
condition 'acl {{name}{arg}...}', and optional args on
acl condition 'acl = name arg...'

- Permit multiple router/transport headers_add/remove
lines.

- Add dnsdb pseudo-lookup 'a+' to do an 'aaaa' + 'a'
combination.

- Avoid using a waiting database for a single-message-only
transport. Performance patch from Paul Fisher. Bugzilla
1262.

- Strip leading/trailing newlines from add_header ACL
modifier data. Bugzilla 884.

- Add $headers_added variable, with content from use of
ACL modifier add_header (but not yet added to the
message). Bugzilla 199.

- Add 8bitmime log_selector, for 8bitmime status on the
received line. Pulled from Bugzilla 817 by Wolfgang
Breyha.

- SECURITY: protect DKIM DNS decoding from remote exploit.
CVE-2012-5671 (nb: this is the same fix as in Exim
4.80.1)

- Add A= logging on delivery lines, and a client_set_id
option on authenticators.

- Add optional authenticated_sender logging to A= and a
log_selector for control.

- Unbreak server_set_id for NTLM/SPA auth, broken by 4.80
PP/29.

- Dovecot auth: log better reason to rejectlog if Dovecot
did not advertise SMTP AUTH mechanism to us, instead of
a generic protocol violation error. Also, make Exim more
robust to bad data from the Dovecot auth socket.

- Fix ultimate retry timeouts for intermittently
deliverable recipients.

- When a queue runner is handling a message, Exim first
routes the recipient addresses, during which it prunes
them based on the retry hints database. After that it
attempts to deliver the message to any remaining
recipients. It then updates the hints database using the
retry rules.

- So if a recipient address works intermittently, it can
get repeatedly deferred at routing time. The retry hints
record remains fresh so the address never reaches the
final cutoff time.

- This is a fairly common occurrence when a user is
bumping up against their storage quota. Exim had some
logic in its local delivery code to deal with this.
However it did not apply to per-recipient defers in
remote deliveries, e.g. over LMTP to a separate IMAP
message store.

- This change adds a proper retry rule check during
routing so that the final cutoff time is checked against
the message's age. We only do this check if there is an
address retry record and there is not a domain retry
record; this implies that previous attempts to handle
the address had the retry_use_local_parts option turned
on. We use this as an approximation for the destination
being like a local delivery, as in LMTP.

- I suspect this new check makes the old local delivery
cutoff check redundant, but I have not verified this so
I left the code in place.

- Correct gecos expansion when From: is a prefix of the
username.

- Test 0254 submits a message to Exim with the header &#9;
Resent-From: f

- When I ran the test suite under the user fanf2, Exim
expanded the header to contain my full name, whereas it
should have added a Resent-Sender: header. It
erroneously treats any prefix of the username as equal
to the username. This change corrects that bug.

- DCC debug and logging tidyup Error conditions log to
paniclog rather than rejectlog. Debug lines prefixed by
'DCC: ' to remove any ambiguity.

- Avoid unnecessary rebuilds of lookup-related code.

- Fix OCSP reinitialisation in SNI handling for Exim/TLS
as server. Bug spotted by Jeremy Harris; was flawed
since initial commit. Would have resulted in OCSP
responses post-SNI triggering an Exim NULL dereference
and crash.

- Add $router_name and $transport_name variables. Bugzilla
308.

- Define SIOCGIFCONF_GIVES_ADDR for GNU Hurd. Bug
detection, analysis and fix by Samuel Thibault. Bugzilla
1331, Debian bug #698092.

- Update eximstats to watch out for senders sending 'HELO
[IpAddr]'

- SMTP PRDR
(http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt
). Server implementation by Todd Lyons, client by JH.
Only enabled when compiled with EXPERIMENTAL_PRDR. A new
config variable 'prdr_enable' controls whether the
server advertises the facility. If the client requests
PRDR a new acl_data_smtp_prdr ACL is called once for
each recipient, after the body content is received and
before the acl_smtp_data ACL. The client is controlled
by bolth of: a hosts_try_prdr option on the smtp
transport, and the server advertisement. Default client
logging of deliveries and rejections involving PRDR are
flagged with the string 'PRDR'.

- Fix problems caused by timeouts during quit ACLs trying
to double fclose(). Diagnosis by Todd Lyons. Update
configure.default to handle IPv6 localhost better. Patch
by Alain Williams (plus minor tweaks). Bugzilla 880.

- OpenSSL made graceful with empty tls_verify_certificates
setting. This is now consistent with GnuTLS, and is now
documented: the previous undocumented portable approach
to treating the option as unset was to force an
expansion failure. That still works, and an empty string
is now equivalent.

- Renamed DNSSEC-enabling option to 'dns_dnssec_ok', to
make it clearer that Exim is using the DO (DNSSEC OK)
EDNS0 resolver flag, not performing validation itself.

- Added force_command boolean option to pipe transport.
Patch from Nick Koston, of cPanel Inc.

- AUTH support on callouts (and hence
cutthrough-deliveries). Bugzilla 321, 823.

- Added udpsend ACL modifer and hexquote expansion
operator

- Fix eximon continuous updating with timestamped
log-files. Broken in a format-string cleanup in 4.80,
missed when I repaired the other false fix of the same
issue. Report and fix from Heiko Schlichting. Bugzilla
1363.

- Guard LDAP TLS usage against Solaris LDAP variant.
Report from Prashanth Katuri.

- Support safari_ecdhe_ecdsa_bug for openssl_options. It's
SecureTransport, so affects any MacOS clients which use
the system-integrated TLS libraries, including email
clients.

- Fix segfault from trying to fprintf() to a NULL stdio
FILE* if using a MIME ACL for non-SMTP local injection.
Report and assistance in diagnosis by Warren Baker.

- Adjust exiqgrep to be case-insensitive for
sender/receiver.

- Fix comparisons for 64b. Bugzilla 1385.

- Add expansion variable $authenticated_fail_id to keep
track of last id that failed so it may be referenced in
subsequent ACL's.

- Bugzilla 1375 - Prevent TLS rebinding in ldap. Patch
provided by Alexander Miroch.

- Bugzilla 1382 - Option ldap_require_cert overrides
start_tls ldap library initialization, allowing
self-signed CA's to be used. Also properly sets
require_cert option later in code by using NULL (global
ldap config) instead of ldap handle (per session). Bug
diagnosis and testing by alxgomz.

- Enhanced documentation in the ratelimit.pl script
provided in the src/util/ subdirectory.

- Bug 1301 - Imported transport SQL logging patch from
Axel Rau renamed to Transport Post Delivery Action by
Jeremy Harris, as EXPERIMENTAL_TPDA.

- Bugzilla 1217 - Redis lookup support has been added. It
is only enabled when Exim is compiled with
EXPERIMENTAL_REDIS. A new config variable redis_servers
= needs to be configured which will be used by the redis
lookup. Patch from Warren Baker, of The Packet Hub.

- Fix exiqsumm summary for corner case. Patch provided by
Richard Hall.

- Bugzilla 1289 - Clarify host/ip processing when have
errors looking up a hostname or reverse DNS when
processing a host list. Used suggestions from multiple
comments on this bug.

- Bugzilla 1057 - Multiple clamd TCP targets patch from
Mark Zealey.

- Had previously added a -CONTINUE option to runtest in
the test suite. Missed a few lines, added it to make the
runtest require no keyboard interaction.

- Bugzilla 1402 - Test 533 fails if any part of the path
to the test suite contains upper case chars. Make router
use caseful_local_part.

- Bugzilla 1400 - Add AVOID_GNUTLS_PKCS11 build option.
Allows GnuTLS support when GnuTLS has been built with
p11-kit.

- Add systemd support for openSUSE > 12.2

- Remove some obsolete conditionnal macros

- exim.spec forces the use of SSL libraries, so make sure
the BuildRequires are there. Also add previously
implicit cyrus-sasl back.

- Fixed another remote code execution issue (CVE-2011-1407
/ bnc#694798)

- Fixed STARTTLS command injection (bnc#695144)

See also :

http://bugs.exim.org/show_bug.cgi?id=1397
http://lists.opensuse.org/opensuse-updates/2014-08/msg00014.html
http://www.eric-a-hall.com/specs/draft-hall-prdr-00.txt
https://bugzilla.novell.com/show_bug.cgi?id=694798
https://bugzilla.novell.com/show_bug.cgi?id=695144
https://bugzilla.novell.com/show_bug.cgi?id=888520

Solution :

Update the affected exim packages.

Risk factor :

High / CVSS Base Score : 7.5
(CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P)

Family: SuSE Local Security Checks

Nessus Plugin ID: 77126 ()

Bugtraq ID:

CVE ID: CVE-2011-1407
CVE-2012-5671
CVE-2014-2957
CVE-2014-2972

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