File _patchinfo of Package patchinfo.22444

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File _patchinfo of Package patchinfo.22444

<patchinfo incident="22444">
  <category>security</category>
  <rating>critical</rating>
  <packager>msmeissn</packager>
  <summary>Security update for samba</summary>
<description>

- CVE-2021-44141: Information leak via symlinks of existance of
  files or directories outside of the exported share; (bso#14911);
  (bsc#1193690);
- CVE-2021-44142: Out-of-bounds heap read/write vulnerability
  in VFS module vfs_fruit allows code execution; (bso#14914);
  (bsc#1194859);
- CVE-2022-0336: Samba AD users with permission to write to an
  account can impersonate arbitrary services; (bso#14950);
  (bsc#1195048);

samba was updated to 4.15.4 (jsc#SLE-23329);

* Duplicate SMB file_ids leading to Windows client cache
  poisoning; (bso#14928);
* Failed to parse NTLMv2_RESPONSE length 95 - Buffer Size Error -
  NT_STATUS_BUFFER_TOO_SMALL; (bso#14932);
* kill_tcp_connections does not work; (bso#14934);
* Can't connect to Windows shares not requiring authentication
  using KDE/Gnome; (bso#14935);
* smbclient -L doesn't set "client max protocol" to NT1 before
  calling the "Reconnecting with SMB1 for workgroup listing"
  path; (bso#14939);
* Cross device copy of the crossrename module always fails;
  (bso#14940);
* symlinkat function from VFS cap module always fails with an
  error; (bso#14941);
* Fix possible fsp pointer deference; (bso#14942);
* Missing pop_sec_ctx() in error path inside close_directory();
  (bso#14944);
* "smbd --build-options" no longer works without an smb.conf file;
  (bso#14945);

Samba was updated to version 4.15.3

+ CVE-2021-43566: Symlink race error can allow directory creation
  outside of the exported share; (bsc#1139519);
+ CVE-2021-20316: Symlink race error can allow metadata read and
  modify outside of the exported share; (bsc#1191227);
- Reorganize libs packages. Split samba-libs into samba-client-libs,
  samba-libs, samba-winbind-libs and samba-ad-dc-libs, merging samba
  public libraries depending on internal samba libraries into these
  packages as there were dependency problems everytime one of these
  public libraries changed its version (bsc#1192684). The devel
  packages are merged into samba-devel.
- Rename package samba-core-devel to samba-devel
- Update the symlink create by samba-dsdb-modules to private samba
  ldb modules following libldb2 changes from /usr/lib64/ldb/samba to
  /usr/lib64/ldb2/modules/ldb/samba

krb5 was updated to 1.16.3 to 1.19.2

* Fix a denial of service attack against the KDC encrypted challenge code; (CVE-2021-36222);
* Fix a memory leak when gss_inquire_cred() is called without a credential handle.

Changes from 1.19.1:

* Fix a linking issue with Samba.
* Better support multiple pkinit_identities values by checking whether
  certificates can be loaded for each value.

Changes from 1.19

Administrator experience
  * When a client keytab is present, the GSSAPI krb5 mech will refresh
    credentials even if the current credentials were acquired manually.
  * It is now harder to accidentally delete the K/M entry from a KDB.
Developer experience
  * gss_acquire_cred_from() now supports the "password" and "verify"
    options, allowing credentials to be acquired via password and
    verified using a keytab key.
  * When an application accepts a GSS security context, the new
    GSS_C_CHANNEL_BOUND_FLAG will be set if the initiator and acceptor
    both provided matching channel bindings.
  * Added the GSS_KRB5_NT_X509_CERT name type, allowing S4U2Self requests
    to identify the desired client principal by certificate.
  * PKINIT certauth modules can now cause the hw-authent flag to be set
    in issued tickets.
  * The krb5_init_creds_step() API will now issue the same password
    expiration warnings as krb5_get_init_creds_password().
Protocol evolution
  * Added client and KDC support for Microsoft's Resource-Based Constrained
    Delegation, which allows cross-realm S4U2Proxy requests. A third-party
    database module is required for KDC support.
  * kadmin/admin is now the preferred server principal name for kadmin
    connections, and the host-based form is no longer created by default.
    The client will still try the host-based form as a fallback.
  * Added client and server support for Microsoft's KERB_AP_OPTIONS_CBT
    extension, which causes channel bindings to be required for the
    initiator if the acceptor provided them. The client will send this
    option if the client_aware_gss_bindings profile option is set.
User experience
  * kinit will now issue a warning if the des3-cbc-sha1 encryption type is
    used in the reply. This encryption type will be deprecated and removed
    in future releases.
  * Added kvno flags --out-cache, --no-store, and --cached-only
    (inspired by Heimdal's kgetcred).

Changes from 1.18.3
* Fix a denial of service vulnerability when decoding Kerberos
  protocol messages.
* Fix a locking issue with the LMDB KDB module which could cause
  KDC and kadmind processes to lose access to the database.
* Fix an assertion failure when libgssapi_krb5 is repeatedly loaded
  and unloaded while libkrb5support remains loaded.

Changes from 1.18.2
* Fix a SPNEGO regression where an acceptor using the default credential
  would improperly filter mechanisms, causing a negotiation failure.
* Fix a bug where the KDC would fail to issue tickets if the local krbtgt
  principal's first key has a single-DES enctype.
* Add stub functions to allow old versions of OpenSSL libcrypto to link
  against libkrb5.
* Fix a NegoEx bug where the client name and delegated credential might
  not be reported.

Changes from 1.18.1
* Fix a crash when qualifying short hostnames when the system has
  no primary DNS domain.
* Fix a regression when an application imports "service@" as a GSS
  host-based name for its acceptor credential handle.
* Fix KDC enforcement of auth indicators when they are modified by
  the KDB module.
* Fix removal of require_auth string attributes when the LDAP KDB
  module is used.
* Fix a compile error when building with musl libc on Linux.
* Fix a compile error when building with gcc 4.x.
* Change the KDC constrained delegation precedence order for consistency
  with Windows KDCs.

Changes from 1.18
Administrator experience:
  * Remove support for single-DES encryption types.
  * Change the replay cache format to be more efficient and robust.
    Replay cache filenames using the new format end with ".rcache2"
    by default.
  * setuid programs will automatically ignore environment variables
    that normally affect krb5 API functions, even if the caller does
    not use krb5_init_secure_context().
  * Add an "enforce_ok_as_delegate" krb5.conf relation to disable
    credential forwarding during GSSAPI authentication unless the KDC
    sets the ok-as-delegate bit in the service ticket.
  * Use the permitted_enctypes krb5.conf setting as the default value
    for default_tkt_enctypes and default_tgs_enctypes.
Developer experience:
  * Implement krb5_cc_remove_cred() for all credential cache types.
  * Add the krb5_pac_get_client_info() API to get the client account
    name from a PAC.
Protocol evolution:
  * Add KDC support for S4U2Self requests where the user is identified
    by X.509 certificate. (Requires support for certificate lookup from
    a third-party KDB module.)
  * Remove support for an old ("draft 9") variant of PKINIT.
  * Add support for Microsoft NegoEx. (Requires one or more third-party
    GSS modules implementing NegoEx mechanisms.)
User experience:
  * Add support for "dns_canonicalize_hostname=fallback", causing
    host-based principal names to be tried first without DNS
    canonicalization, and again with DNS canonicalization if the
    un-canonicalized server is not found.
  * Expand single-component hostnames in host-based principal names
    when DNS canonicalization is not used, adding the system's first DNS
    search path as a suffix. Add a "qualify_shortname" krb5.conf relation
    to override this suffix or disable expansion.
  * Honor the transited-policy-checked ticket flag on application servers,
    eliminating the requirement to configure capaths on servers in some
    scenarios.
Code quality:
  * The libkrb5 serialization code (used to export and import krb5 GSS
    security contexts) has been simplified and made type-safe.
  * The libkrb5 code for creating KRB-PRIV, KRB-SAFE, and KRB-CRED
    messages has been revised to conform to current coding practices.
  * The test suite has been modified to work with macOS System Integrity
    Protection enabled.
  * The test suite incorporates soft-pkcs11 so that PKINIT PKCS11 support
    can always be tested.

Changes from 1.17.1
* Fix a bug preventing "addprinc -randkey -kvno" from working in kadmin.
* Fix a bug preventing time skew correction from working when a KCM
  credential cache is used.

Changes from 1.17:
Administrator experience:
* A new Kerberos database module using the Lightning Memory-Mapped
  Database library (LMDB) has been added.  The LMDB KDB module should
  be more performant and more robust than the DB2 module, and may
  become the default module for new databases in a future release.
* "kdb5_util dump" will no longer dump policy entries when specific
  principal names are requested.
Developer experience:
* The new krb5_get_etype_info() API can be used to retrieve enctype,
  salt, and string-to-key parameters from the KDC for a client
  principal.
* The new GSS_KRB5_NT_ENTERPRISE_NAME name type allows enterprise
  principal names to be used with GSS-API functions.
* KDC and kadmind modules which call com_err() will now write to the
  log file in a format more consistent with other log messages.
* Programs which use large numbers of memory credential caches should
  perform better.
Protocol evolution:
* The SPAKE pre-authentication mechanism is now supported.  This
  mechanism protects against password dictionary attacks without
  requiring any additional infrastructure such as certificates.  SPAKE
  is enabled by default on clients, but must be manually enabled on
  the KDC for this release.
* PKINIT freshness tokens are now supported.  Freshness tokens can
  protect against scenarios where an attacker uses temporary access to
  a smart card to generate authentication requests for the future.
* Password change operations now prefer TCP over UDP, to avoid
  spurious error messages about replays when a response packet is
  dropped.
* The KDC now supports cross-realm S4U2Self requests when used with a
  third-party KDB module such as Samba's.  The client code for
  cross-realm S4U2Self requests is also now more robust.
User experience:
* The new ktutil addent -f flag can be used to fetch salt information
  from the KDC for password-based keys.
* The new kdestroy -p option can be used to destroy a credential cache
  within a collection by client principal name.
* The Kerberos man page has been restored, and documents the
  environment variables that affect programs using the Kerberos
  library.
Code quality:
* Python test scripts now use Python 3.
* Python test scripts now display markers in verbose output, making it
  easier to find where a failure occurred within the scripts.
* The Windows build system has been simplified and updated to work
  with more recent versions of Visual Studio.  A large volume of
  unused Windows-specific code has been removed.  Visual Studio 2013
  or later is now required.

- Build with full Cyrus SASL support. Negotiating SASL credentials with
  an EXTERNAL bind mechanism requires interaction. Kerberos provides its
  own interaction function that skips all interaction, thus preventing the
  mechanism from working.
ldb was updated to version 2.4.1 (jsc#SLE-23329);

- Release 2.4.1

+ Corrected python behaviour for 'in' for LDAP attributes
    contained as part of ldb.Message; (bso#14845);
  + Fix memory handling in ldb.msg_diff; (bso#14836);

- Release 2.4.0

+ pyldb: Fix Message.items() for a message containing elements
  + pyldb: Add test for Message.items()
  + tests: Use ldbsearch '--scope instead of '-s'
  + Change page size of guidindexpackv1.ldb
  + Use a 1MiB lmdb so the test also passes on aarch64 CentOS stream
  + attrib_handler casefold: simplify space dropping
  + fix ldb_comparison_fold off-by-one overrun
  + CVE-2020-27840: pytests: move Dn.validate test to ldb
  + CVE-2020-27840 ldb_dn: avoid head corruption in ldb_dn_explode
  + CVE-2021-20277 ldb/attrib_handlers casefold: stay in bounds
  + CVE-2021-20277 ldb tests: ldb_match tests with extra spaces
  + improve comments for ldb_module_connect_backend()
  + test/ldb_tdb: correct introductory comments
  + ldb.h: remove undefined async_ctx function signatures
  + correct comments in attrib_handers val_to_int64
  + dn tests use cmocka print functions
  + ldb_match: remove redundant check
  + add tests for ldb_wildcard_compare
  + ldb_match: trailing chunk must match end of string
  + pyldb: catch potential overflow error in py_timestring
  + ldb: remove some 'if PY3's in tests

talloc was updated to 2.3.3:

+ various bugfixes
+ python: Ensure reference counts are properly incremented
+ Change pytalloc source to LGPL
+ Upgrade waf to 2.0.18 to fix a cross-compilation issue;
   (bso#13846).

tdb was updated to version 1.4.4:

+ various bugfixes

tevent was updated to version 0.11.0:

+ Add custom tag to events
+ Add event trace api

sssd was updated to:

- Fix tests test_copy_ccache &amp; test_copy_keytab for later versions of krb5
- Update the private ldb modules installation following libldb2 
  changes from /usr/lib64/ldb/samba to /usr/lib64/ldb2/modules/ldb/samba

apparmor was updated to:

- Cater for changes to ldb packaging to allow parallel installation with libldb (bsc#1192684).
- add profile for samba-bgqd (bsc#1191532).

</description>
  <issue id="1139519" tracker="bnc">VUL-0: CVE-2021-43566: samba: mkdir race condition allows share escape in Samba 4.x</issue>
  <issue id="1191227" tracker="bnc">VUL-1: CVE-2021-20316: samba: Symlink race error can allow metadata read and modify outside of the exported share</issue>
  <issue id="1191532" tracker="bnc">[Build 20211008] Samba 4.15 - failed to start</issue>
  <issue id="1192684" tracker="bnc">[Build 61.1] openQA test fails in start_install -the installed libproxy1-pacrunner-webkit-0.4.13-18.3.1.ppc64le requires 'libproxy1 = 0.4.13', but this requirement cannot be provided</issue>
  <issue id="1183572" tracker="bnc">VUL-0: CVE-2020-27840: ldb: Unauthenticated remote heap corruption via bad DNs</issue>
  <issue id="1183574" tracker="bnc">VUL-0: CVE-2021-20277: ldb: out of bounds read in ldb_handler_fold</issue>
  <issue id="1188571" tracker="bnc"> VUL-0: CVE-2021-36222: krb5: sending a request containing a PA-ENCRYPTED-CHALLENGE padata element without using FAST could result in null dereference in the KDC which leads to DoS </issue>
  <issue id="2020-27840" tracker="cve"/>
  <issue id="2021-20277" tracker="cve"/>
  <issue id="2021-20316" tracker="cve"/>
  <issue id="2021-43566" tracker="cve"/>
  <issue id="2021-36222" tracker="cve"/>
  <issue id="SLE-23329" tracker="jsc"/>
  <issue id="1193690" tracker="bnc">VUL-0: EMBARGOED: CVE-2021-44141: samba: Information leak via symlinks of existance of files or directories outside of the exported share</issue>
  <issue id="1194859" tracker="bnc">VUL-0: EMBARGOED: CVE-2021-44142: samba: Out-of-Bound Read/Write on Samba vfs_fruit module ( VU#119678 )</issue>
  <issue id="1195048" tracker="bnc">VUL-0: EMBARGOED: CVE-2022-0336: samba: Samba AD users with permission to write to an account can impersonate arbitrary services</issue>
  <issue id="2021-44141" tracker="cve" />
  <issue id="2021-44142" tracker="cve" />
  <issue id="2022-0336" tracker="cve" />
</patchinfo>

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