Samba 4.12.4 Available for Download

Samba 4.12.4 (gzipped)
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Patch (gzipped) against Samba 4.12.3
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                   Release Notes for Samba 4.12.4
                            July 02, 2020
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This is a security release in order to address the following defects:

o CVE-2020-10730: NULL pointer de-reference and use-after-free in Samba AD DC
		  LDAP Server with ASQ, VLV and paged_results.
o CVE-2020-10745: Parsing and packing of NBT and DNS packets can consume
		  excessive CPU
o CVE-2020-10760: LDAP Use-after-free in Samba AD DC Global Catalog with
		  paged_results and VLV.
o CVE-2020-14303: Empty UDP packet DoS in Samba AD DC nbtd.


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Details
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o  CVE-2020-10730:
   A client combining the 'ASQ' and 'VLV' LDAP controls can cause a NULL pointer
   de-reference and further combinations with the LDAP paged_results feature can
   give a use-after-free in Samba's AD DC LDAP server.

o  CVE-2020-10745: Parsing and packing of NBT and DNS packets can consume
   excessive CPU.

o  CVE-2020-10760:
   The use of the paged_results or VLV controls against the Global Catalog LDAP
   server on the AD DC will cause a use-after-free.

o  CVE-2020-14303:
   The AD DC NBT server in Samba 4.0 will enter a CPU spin and not process
   further requests once it receives an empty (zero-length) UDP packet to
   port 137.

For more details, please refer to the security advisories.


Changes since 4.12.3
--------------------

o  Douglas Bagnall <douglas.bagnall@catalyst.net.nz>
   * BUG 14378: CVE-2020-10745: Invalid DNS or NBT queries containing dots use
     several seconds of CPU each.

o  Andrew Bartlett <abartlet@samba.org>
   * BUG 14364: CVE-2020-10730: NULL de-reference in AD DC LDAP server when ASQ
     and VLV combined.
   * BUG 14402: CVE-2020-10760: Fix use-after-free in AD DC Global Catalog LDAP
     server with paged_result or VLV.
   * BUG 14417: CVE-2020-14303: Fix endless loop from empty UDP packet sent to
     AD DC nbt_server.

o  Gary Lockyer <gary@catalyst.net.nz>
   * BUG 14364: CVE-2020-10730: NULL de-reference in AD DC LDAP server when ASQ
     and VLV combined, ldb: Bump version to 2.1.4.