The branch, master has been updated
via 2619c79 NEWS[4.5.3]: Samba 4.5.3, 4.4.8 and 4.3.13 Security
Releases Available for Download
from f6f51dc header_history.html: Add Samba 4.5.2.
https://git.samba.org/?p=samba-web.git;a=shortlog;h=master
- Log -----------------------------------------------------------------
commit 2619c7913be269cdef2e7f5c28467fe77f58244a
Author: Karolin Seeger <ksee...@samba.org>
Date: Fri Dec 9 10:41:36 2016 +0100
NEWS[4.5.3]: Samba 4.5.3, 4.4.8 and 4.3.13 Security Releases Available for
Download
Signed-off-by: Karolin Seeger <ksee...@samba.org>
-----------------------------------------------------------------------
Summary of changes:
history/header_history.html | 4 +
history/samba-4.3.13.html | 81 +++++++++++++++
history/samba-4.4.8.html | 81 +++++++++++++++
history/samba-4.5.3.html | 81 +++++++++++++++
history/security.html | 21 ++++
posted_news/20161219-081451.4.5.3.body.html | 29 ++++++
posted_news/20161219-081451.4.5.3.headline.html | 4 +
security/CVE-2016-2123.html | 71 +++++++++++++
security/CVE-2016-2125.html | 131 ++++++++++++++++++++++++
security/CVE-2016-2126.html | 101 ++++++++++++++++++
10 files changed, 604 insertions(+)
create mode 100644 history/samba-4.3.13.html
create mode 100644 history/samba-4.4.8.html
create mode 100644 history/samba-4.5.3.html
create mode 100644 posted_news/20161219-081451.4.5.3.body.html
create mode 100644 posted_news/20161219-081451.4.5.3.headline.html
create mode 100644 security/CVE-2016-2123.html
create mode 100644 security/CVE-2016-2125.html
create mode 100644 security/CVE-2016-2126.html
Changeset truncated at 500 lines:
diff --git a/history/header_history.html b/history/header_history.html
index 9f7a699..cbbb7a8 100755
--- a/history/header_history.html
+++ b/history/header_history.html
@@ -9,9 +9,12 @@
<li><a href="/samba/history/">Release Notes</a>
<li class="navSub">
<ul>
+ <li><a href="samba-4.5.3.html">samba-4.5.3</a></li>
<li><a href="samba-4.5.2.html">samba-4.5.2</a></li>
<li><a href="samba-4.5.1.html">samba-4.5.1</a></li>
<li><a href="samba-4.5.0.html">samba-4.5.0</a></li>
+ <li><a href="samba-4.4.8.html">samba-4.4.8</a></li>
+ <li><a href="samba-4.4.7.html">samba-4.4.7</a></li>
<li><a href="samba-4.4.6.html">samba-4.4.6</a></li>
<li><a href="samba-4.4.5.html">samba-4.4.5</a></li>
<li><a href="samba-4.4.4.html">samba-4.4.4</a></li>
@@ -19,6 +22,7 @@
<li><a href="samba-4.4.2.html">samba-4.4.2</a></li>
<li><a href="samba-4.4.1.html">samba-4.4.1 (do not
use)</a></li>
<li><a href="samba-4.4.0.html">samba-4.4.0</a></li>
+ <li><a href="samba-4.3.13.html">samba-4.3.13</a></li>
<li><a href="samba-4.3.12.html">samba-4.3.12</a></li>
<li><a href="samba-4.3.11.html">samba-4.3.11</a></li>
<li><a href="samba-4.3.10.html">samba-4.3.10</a></li>
diff --git a/history/samba-4.3.13.html b/history/samba-4.3.13.html
new file mode 100644
index 0000000..e0acc4c
--- /dev/null
+++ b/history/samba-4.3.13.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
+<html xmlns="http://www.w3.org/1999/xhtml";>
+<head>
+<title>Samba 4.3.13 - Release Notes</title>
+</head>
+<body>
+<H2>Samba 4.3.13 Available for Download</H2>
+<p>
+<a
href="https://download.samba.org/pub/samba/stable/samba-4.3.13.tar.gz";>Samba
4.3.13 (gzipped)</a><br>
+<a
href="https://download.samba.org/pub/samba/stable/samba-4.3.13.tar.asc";>Signature</a>
+</p>
+<p>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.3.12-4.3.13.diffs.gz";>Patch
(gzipped) against Samba 4.3.12</a><br>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.3.12-4.3.13.diffs.asc";>Signature</a>
+</p>
+<p>
+<pre>
+ ==============================
+ Release Notes for Samba 4.3.13
+ December 19, 2016
+ ==============================
+
+
+This is a security release in order to address the following defects:
+
+o CVE-2016-2123 (Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer
+ Overflow Remote Code Execution Vulnerability).
+o CVE-2016-2125 (Unconditional privilege delegation to Kerberos servers in
+ trusted realms).
+o CVE-2016-2126 (Flaws in Kerberos PAC validation can trigger privilege
+ elevation).
+
+=======
+Details
+=======
+
+o CVE-2016-2123:
+ The Samba routine ndr_pull_dnsp_name contains an integer wrap problem,
+ leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name
+ parses data from the Samba Active Directory ldb database. Any user
+ who can write to the dnsRecord attribute over LDAP can trigger this
+ memory corruption.
+
+ By default, all authenticated LDAP users can write to the dnsRecord
+ attribute on new DNS objects. This makes the defect a remote privilege
+ escalation.
+
+o CVE-2016-2125
+ Samba client code always requests a forwardable ticket
+ when using Kerberos authentication. This means the
+ target server, which must be in the current or trusted
+ domain/realm, is given a valid general purpose Kerberos
+ "Ticket Granting Ticket" (TGT), which can be used to
+ fully impersonate the authenticated user or service.
+
+o CVE-2016-2126
+ A remote, authenticated, attacker can cause the winbindd process
+ to crash using a legitimate Kerberos ticket due to incorrect
+ handling of the arcfour-hmac-md5 PAC checksum.
+
+ A local service with access to the winbindd privileged pipe can
+ cause winbindd to cache elevated access permissions.
+
+
+Changes since 4.3.12:
+---------------------
+
+o Volker Lendecke <v...@samba.org>
+ * BUG 12409: CVE-2016-2123: Fix DNS vuln ZDI-CAN-3995.
+
+o Stefan Metzmacher <me...@samba.org>
+ * BUG 12445: CVE-2016-2125: Don't send delegated credentials to all
servers.
+ * BUG 12446: CVE-2016-2126: auth/kerberos: Only allow known checksum types
in
+ check_pac_checksum().
+
+
+</pre>
+</p>
+</body>
+</html>
diff --git a/history/samba-4.4.8.html b/history/samba-4.4.8.html
new file mode 100644
index 0000000..9cf85bd
--- /dev/null
+++ b/history/samba-4.4.8.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
+<html xmlns="http://www.w3.org/1999/xhtml";>
+<head>
+<title>Samba 4.4.8 - Release Notes</title>
+</head>
+<body>
+<H2>Samba 4.4.8 Available for Download</H2>
+<p>
+<a href="https://download.samba.org/pub/samba/stable/samba-4.4.8.tar.gz";>Samba
4.4.8 (gzipped)</a><br>
+<a
href="https://download.samba.org/pub/samba/stable/samba-4.4.8.tar.asc";>Signature</a>
+</p>
+<p>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.4.7-4.4.8.diffs.gz";>Patch
(gzipped) against Samba 4.4.7</a><br>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.4.7-4.4.8.diffs.asc";>Signature</a>
+</p>
+<p>
+<pre>
+ =============================
+ Release Notes for Samba 4.4.8
+ December 19, 2016
+ =============================
+
+
+This is a security release in order to address the following defects:
+
+o CVE-2016-2123 (Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer
+ Overflow Remote Code Execution Vulnerability).
+o CVE-2016-2125 (Unconditional privilege delegation to Kerberos servers in
+ trusted realms).
+o CVE-2016-2126 (Flaws in Kerberos PAC validation can trigger privilege
+ elevation).
+
+=======
+Details
+=======
+
+o CVE-2016-2123:
+ The Samba routine ndr_pull_dnsp_name contains an integer wrap problem,
+ leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name
+ parses data from the Samba Active Directory ldb database. Any user
+ who can write to the dnsRecord attribute over LDAP can trigger this
+ memory corruption.
+
+ By default, all authenticated LDAP users can write to the dnsRecord
+ attribute on new DNS objects. This makes the defect a remote privilege
+ escalation.
+
+o CVE-2016-2125
+ Samba client code always requests a forwardable ticket
+ when using Kerberos authentication. This means the
+ target server, which must be in the current or trusted
+ domain/realm, is given a valid general purpose Kerberos
+ "Ticket Granting Ticket" (TGT), which can be used to
+ fully impersonate the authenticated user or service.
+
+o CVE-2016-2126
+ A remote, authenticated, attacker can cause the winbindd process
+ to crash using a legitimate Kerberos ticket due to incorrect
+ handling of the arcfour-hmac-md5 PAC checksum.
+
+ A local service with access to the winbindd privileged pipe can
+ cause winbindd to cache elevated access permissions.
+
+
+Changes since 4.4.7:
+--------------------
+
+o Volker Lendecke <v...@samba.org>
+ * BUG 12409: CVE-2016-2123: Fix DNS vuln ZDI-CAN-3995.
+
+o Stefan Metzmacher <me...@samba.org>
+ * BUG 12445: CVE-2016-2125: Don't send delegated credentials to all
servers.
+ * BUG 12446: CVE-2016-2126: auth/kerberos: Only allow known checksum types
in
+ check_pac_checksum().
+
+
+</pre>
+</p>
+</body>
+</html>
diff --git a/history/samba-4.5.3.html b/history/samba-4.5.3.html
new file mode 100644
index 0000000..71be68d
--- /dev/null
+++ b/history/samba-4.5.3.html
@@ -0,0 +1,81 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
+<html xmlns="http://www.w3.org/1999/xhtml";>
+<head>
+<title>Samba 4.5.3 - Release Notes</title>
+</head>
+<body>
+<H2>Samba 4.5.3 Available for Download</H2>
+<p>
+<a href="https://download.samba.org/pub/samba/stable/samba-4.5.3.tar.gz";>Samba
4.5.3 (gzipped)</a><br>
+<a
href="https://download.samba.org/pub/samba/stable/samba-4.5.3.tar.asc";>Signature</a>
+</p>
+<p>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.5.2-4.5.3.diffs.gz";>Patch
(gzipped) against Samba 4.5.2</a><br>
+<a
href="https://download.samba.org/pub/samba/patches/samba-4.5.2-4.5.3.diffs.asc";>Signature</a>
+</p>
+<p>
+<pre>
+ =============================
+ Release Notes for Samba 4.5.3
+ December 19, 2016
+ =============================
+
+
+This is a security release in order to address the following defects:
+
+o CVE-2016-2123 (Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer
+ Overflow Remote Code Execution Vulnerability).
+o CVE-2016-2125 (Unconditional privilege delegation to Kerberos servers in
+ trusted realms).
+o CVE-2016-2126 (Flaws in Kerberos PAC validation can trigger privilege
+ elevation).
+
+=======
+Details
+=======
+
+o CVE-2016-2123:
+ The Samba routine ndr_pull_dnsp_name contains an integer wrap problem,
+ leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name
+ parses data from the Samba Active Directory ldb database. Any user
+ who can write to the dnsRecord attribute over LDAP can trigger this
+ memory corruption.
+
+ By default, all authenticated LDAP users can write to the dnsRecord
+ attribute on new DNS objects. This makes the defect a remote privilege
+ escalation.
+
+o CVE-2016-2125
+ Samba client code always requests a forwardable ticket
+ when using Kerberos authentication. This means the
+ target server, which must be in the current or trusted
+ domain/realm, is given a valid general purpose Kerberos
+ "Ticket Granting Ticket" (TGT), which can be used to
+ fully impersonate the authenticated user or service.
+
+o CVE-2016-2126
+ A remote, authenticated, attacker can cause the winbindd process
+ to crash using a legitimate Kerberos ticket due to incorrect
+ handling of the arcfour-hmac-md5 PAC checksum.
+
+ A local service with access to the winbindd privileged pipe can
+ cause winbindd to cache elevated access permissions.
+
+
+Changes since 4.5.2:
+--------------------
+
+o Volker Lendecke <v...@samba.org>
+ * BUG 12409: CVE-2016-2123: Fix DNS vuln ZDI-CAN-3995.
+
+o Stefan Metzmacher <me...@samba.org>
+ * BUG 12445: CVE-2016-2125: Don't send delegated credentials to all
servers.
+ * BUG 12446: CVE-2016-2126: auth/kerberos: Only allow known checksum types
in
+ check_pac_checksum().
+
+
+</pre>
+</p>
+</body>
+</html>
diff --git a/history/security.html b/history/security.html
index 72df46b..c484c78 100755
--- a/history/security.html
+++ b/history/security.html
@@ -22,6 +22,27 @@ link to full release notes for each release.</p>
</tr>
<tr>
+ <td>19 Dec 2016</td>
+ <td><a
href="/samba/ftp/patches/security/samba-4.5.2-security-20016-12-19.patch">
+ patch for Samba 4.5.2</a><br />
+ <a
href="/samba/ftp/patches/security/samba-4.4.7-security-20016-12-19.patch">
+ patch for Samba 4.4.7</a><br />
+ <a
href="/samba/ftp/patches/security/samba-4.3.12-security-20016-12-19.patch">
+ patch for Samba 4.3.12</a><br />
+ <td>Numerous CVEs. Please see the announcements for details.
+ </td>
+ <td>please refer to the advisories</td>
+ <td><a
href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2123";>CVE-2016-2123</a>,
+ <a
href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2125";>CVE-2016-2125</a>,
+ <a
href="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2016-2126";>CVE-2016-2126</a>
+ </td>
+ <td><a href="/samba/security/CVE-2016-2123.html">Announcement</a>,
+ <a href="/samba/security/CVE-2016-2125.html">Announcement</a>,
+ <a href="/samba/security/CVE-2016-2126.html">Announcement</a>
+ </td>
+ </tr>
+
+ <tr>
<td>07 Jul 2016</td>
<td><a
href="/samba/ftp/patches/security/samba-4.4.4-CVE-2016-2119.patch">
patch for Samba 4.4.4</a><br />
diff --git a/posted_news/20161219-081451.4.5.3.body.html
b/posted_news/20161219-081451.4.5.3.body.html
new file mode 100644
index 0000000..8e5065b
--- /dev/null
+++ b/posted_news/20161219-081451.4.5.3.body.html
@@ -0,0 +1,29 @@
+<!-- BEGIN: posted_news/20161219-081451.4.5.3.body.html -->
+<h5><a name="4.5.3">19 December 2016</a></h5>
+<p class=headline>Samba 4.5.3, 4.4.8 and 4.3.13 Security Releases Available
for Download</p>
+<p>
+These are security releases in order to address
+<a href="/samba/security/CVE-2016-2123.html">CVE-2016-2123</a>
+(Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer Overflow Remote Code
Execution Vulnerability),
+<a href="/samba/security/CVE-2016-2125.html">CVE-2016-2125</a>
+(Unconditional privilege delegation to Kerberos servers in trusted realms),
+<a href="/samba/security/CVE-2016-2126.html">CVE-2016-2126</a>
+(Flaws in Kerberos PAC validation can trigger privilege elevation).
+</p>
+<p>
+The uncompressed tarballs have been signed using GnuPG (ID 6F33915B6568B7EA).
+<br>
+The 4.5.3 source code can be <a
href="https://download.samba.org/pub/samba/stable/samba-4.5.3.tar.gz";>downloaded
now</a>.
+A <a
href="https://download.samba.org/pub/samba/patches/samba-4.5.2-4.5.3.diffs.gz";>patch
against Samba 4.5.2</a> is also available.
+See <a href="https://www.samba.org/samba/history/samba-4.5.3.html";>the 4.5.3
release notes for more info</a>.
+<br>
+The 4.4.8 source code can be <a
+href="https://download.samba.org/pub/samba/stable/samba-4.4.8.tar.gz";>downloaded
now</a>.
+A <a
href="https://download.samba.org/pub/samba/patches/samba-4.4.7-4.4.8.diffs.gz";>patch
against Samba 4.4.7</a> is also available.
+See <a href="https://www.samba.org/samba/history/samba-4.4.8.html";>the 4.4.8
release notes for more info</a>.
+<br>
+The 4.3.13 source code can be <a
href="https://download.samba.org/pub/samba/stable/samba-4.3.13.tar.gz";>downloaded
now</a>.
+A <a
href="https://download.samba.org/pub/samba/patches/patch-4.3.12-4.3.13.diffs.gz";>patch
against Samba 4.3.12</a> is also available.
+See <a href="https://www.samba.org/samba/history/samba-4.3.13.html";>the 4.3.13
release notes for more info</a>.
+</p>
+<!-- END: posted_news/20161219-081451.4.5.3.body.html -->
diff --git a/posted_news/20161219-081451.4.5.3.headline.html
b/posted_news/20161219-081451.4.5.3.headline.html
new file mode 100644
index 0000000..2d5acf0
--- /dev/null
+++ b/posted_news/20161219-081451.4.5.3.headline.html
@@ -0,0 +1,4 @@
+<!-- BEGIN: posted_news/20161219-081451.4.5.3.headline.html -->
+<li> 19 December 2016 <a href="#4.5.3">Samba 4.5.3, 4.4.8 and 4.3.13 Security
+Releases Available for Download</a></li>
+<!-- END: posted_news/20161219-081451.4.5.3.headline.html -->
diff --git a/security/CVE-2016-2123.html b/security/CVE-2016-2123.html
new file mode 100644
index 0000000..142d3ee
--- /dev/null
+++ b/security/CVE-2016-2123.html
@@ -0,0 +1,71 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
+<html xmlns="http://www.w3.org/1999/xhtml";>
+
+<head>
+<title>Samba - Security Announcement Archive</title>
+</head>
+
+<body>
+
+ <H2>CVE-2016-2123.html:</H2>
+
+<p>
+<pre>
+======================================================================
+== Subject: Samba NDR Parsing ndr_pull_dnsp_name Heap-based Buffer
+== Overflow Remote Code Execution Vulnerability
+==
+== CVE ID#: CVE-2016-2123
+== ZDE ID#: ZDI-CAN-3995
+==
+== Versions: Samba 4.0.0 to 4.5.2
+==
+== Summary: Authenicated users can supply malicious dnsRecord attributes
+== on DNS objects and trigger a controlled memory corruption.
+==
+======================================================================
+
+===========
+Description
+===========
+
+The Samba routine ndr_pull_dnsp_name contains an integer wrap problem,
+leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name
+parses data from the Samba Active Directory ldb database. Any user
+who can write to the dnsRecord attribute over LDAP can trigger this
+memory corruption.
+
+By default, all authenticated LDAP users can write to the dnsRecord
+attribute on new DNS objects. This makes the defect a remote privilege
+escalation.
+
+==================
+Patch Availability
+==================
+
+A patch addressing this defect has been posted to
+
+ https://www.samba.org/samba/security/
+
+Additionally, Samba 4.5.3, 4.4.8 and 4.3.13 have been issued as
+security releases to correct the defect. Samba vendors and administrators
+running affected versions are advised to upgrade or apply the patch as
+soon as possible.
+
+==========
+Workaround
+==========
+
+It is possible to change the ntSecurityDescriptor on DNS zones, but
+this will impact on the expected behaviour of the AD Domain.
+
+=======
+Credits
+=======
+
+This vulnerability was detected and reported to the Samba developers
+by Trend Micro's Zero Day Initiative and Frederic Besler.
+</pre>
+</body>
+</html>
diff --git a/security/CVE-2016-2125.html b/security/CVE-2016-2125.html
new file mode 100644
index 0000000..c46e3aa
--- /dev/null
+++ b/security/CVE-2016-2125.html
@@ -0,0 +1,131 @@
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
+ "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd";>
+<html xmlns="http://www.w3.org/1999/xhtml";>
+
+<head>
+<title>Samba - Security Announcement Archive</title>
+</head>
+
+<body>
+
+ <H2>CVE-2016-2125.html:</H2>
+
+<p>
+<pre>
+===============================================================================
+== Subject: Unconditional privilege delegation to Kerberos servers in
trusted realms
+==
+== CVE ID#: CVE-2016-2125
+==
+== Versions: Samba 3.0.25 to 4.5.2
+==
+== Summary: Samba client code always requests a forwardable ticket
+== when using Kerberos authentication. This means the
+== target server, which must be in the current or trusted
+== domain/realm, is given a valid general purpose Kerberos
+== "Ticket Granting Ticket" (TGT), which can be used to
+== fully impersonate the authenticated user or service.
+==
+================================================================================
+
+===========
+Description
+===========
+
+The Samba client code always requests a forwardable Kerberos ticket when
+performing Kerberos authentication by passing the GSS_C_DELEG_FLAG to the
+gss_init_sec_context() GSSAPI function.
+
+The use of GSS_C_DELEG_FLAG, if accepted by the Kerberos KDC, results in
+passing the forwardable TGT to the remote target service via Kerberos AP-REQ.
+The target service by design must be part of the same or a trusted Kerberos
+realm (a domain in the same or trusted Active Directory forest).
+
+The service that accepts the AP-REQ from the client can thus do whatever the
+client is also able to achieve with the Kerberos TGT.
+
+The risks of impersonation of the client are similar to the well known risks
+from forwarding of NTLM credentials, with two important differences:
+ - NTLM forwarding can and should be mitigated with packet signing
+ - Kerberos forwarding can only be attempted after the trusted
+ destination server decrypts the ticket.
+
+Finally, it should be noted that typically the connections involved
+are either explicitly requested, or are between or to Domain
--
Samba Website Repository
