+ =============================
+ Release Notes for Samba 4.9.3
+ November 27, 2018
+ =============================
+
+
+This is a security release in order to address the following defects:
+
+o CVE-2018-14629 (Unprivileged adding of CNAME record causing loop in AD
+ Internal DNS server)
+o CVE-2018-16841 (Double-free in Samba AD DC KDC with PKINIT)
+o CVE-2018-16851 (NULL pointer de-reference in Samba AD DC LDAP server)
+o CVE-2018-16852 (NULL pointer de-reference in Samba AD DC DNS servers)
+o CVE-2018-16853 (Samba AD DC S4U2Self crash in experimental MIT Kerberos
+ configuration (unsupported))
+o CVE-2018-16857 (Bad password count in AD DC not always effective)
+
+
+=======
+Details
+=======
+
+o CVE-2018-14629:
+ All versions of Samba from 4.0.0 onwards are vulnerable to infinite
+ query recursion caused by CNAME loops. Any dns record can be added via
+ ldap by an unprivileged user using the ldbadd tool, so this is a
+ security issue.
+
+o CVE-2018-16841:
+ When configured to accept smart-card authentication, Samba's KDC will call
+ talloc_free() twice on the same memory if the principal in a validly signed
+ certificate does not match the principal in the AS-REQ.
+
+ This is only possible after authentication with a trusted certificate.
+
+ talloc is robust against further corruption from a double-free with
+ talloc_free() and directly calls abort(), terminating the KDC process.
+
+ There is no further vulnerability associated with this issue, merely a
+ denial of service.
+
+o CVE-2018-16851:
+ During the processing of an LDAP search before Samba's AD DC returns
+ the LDAP entries to the client, the entries are cached in a single
+ memory object with a maximum size of 256MB. When this size is
+ reached, the Samba process providing the LDAP service will follow the
+ NULL pointer, terminating the process.
+
+ There is no further vulnerability associated with this issue, merely a
+ denial of service.
+
+o CVE-2018-16852:
+ During the processing of an DNS zone in the DNS management DCE/RPC server,
+ the internal DNS server or the Samba DLZ plugin for BIND9, if the
+ DSPROPERTY_ZONE_MASTER_SERVERS property or DSPROPERTY_ZONE_SCAVENGING_SERVERS
+ property is set, the server will follow a NULL pointer and terminate.
+
+ There is no further vulnerability associated with this issue, merely a
+ denial of service.
+
+o CVE-2018-16853:
+ A user in a Samba AD domain can crash the KDC when Samba is built in the
+ non-default MIT Kerberos configuration.
+
+ With this advisory we clarify that the MIT Kerberos build of the Samba
+ AD DC is considered experimental. Therefore the Samba Team will not
+ issue security patches for this configuration.
+
+o CVE-2018-16857:
+ AD DC Configurations watching for bad passwords (to restrict brute forcing
+ of passwords) in a window of more than 3 minutes may not watch for bad
+ passwords at all.
+
+For more details and workarounds, please refer to the security advisories.
+
+
+Changes since 4.9.2:
+--------------------
+
+o Andrew Bartlett <abartlet@samba.org>
+ * BUG 13628: CVE-2018-16841: heimdal: Fix segfault on PKINIT with
+ mis-matching principal.
+ * BUG 13678: CVE-2018-16853: build: The Samba AD DC, when build with MIT
+ Kerberos is experimental
+
+o Tim Beale <timbeale@catalyst.net.nz>
+ * BUG 13683: CVE-2018-16857: dsdb/util: Correctly treat
+ lockOutObservationWindow as 64-bit int.
+
+o Joe Guo <joeg@catalyst.net.nz>
+ * BUG 13683: CVE-2018-16857 PEP8: Fix E305: Expected 2 blank lines after
+ class or function definition, found 1.
+
+o Aaron Haslett <aaronhaslett@catalyst.net.nz>
+ * BUG 13600: CVE-2018-14629: dns: CNAME loop prevention using counter.
+
+o Gary Lockyer <gary@catalyst.net.nz>
+ * BUG 13669: CVE-2018-16852: Fix NULL pointer de-reference in Samba AD DC
+ DNS management.
+
+o Garming Sam <garming@catalyst.net.nz>
+ * BUG 13674: CVE-2018-16851: ldap_server: Check ret before manipulating blob.
+
+
+#######################################
+Reporting bugs & Development Discussion
+#######################################
+
+Please discuss this release on the samba-technical mailing list or by
+joining the #samba-technical IRC channel on irc.freenode.net.
+
+If you do report problems then please try to send high quality
+feedback. If you don't provide vital information to help us track down
+the problem then you will probably be ignored. All bug reports should
+be filed under the "Samba 4.1 and newer" product in the project's Bugzilla
+database (https://bugzilla.samba.org/).
+
+
+======================================================================
+== Our Code, Our Bugs, Our Responsibility.
+== The Samba Team
+======================================================================
+
+
+Release notes for older releases follow:
+----------------------------------------
+
=============================
Release Notes for Samba 4.9.2
November 08, 2018
======================================================================
-Release notes for older releases follow:
-----------------------------------------
+----------------------------------------------------------------------
+
=============================
Release Notes for Samba 4.9.1
git.samba.org / samba.git / commitdiff