ESB-2019.1218 - [Debian] samba: Multiple vulnerabilities 2019-04-10

Printable version
PGP/GPG verifiable version

Hash: SHA256

             AUSCERT External Security Bulletin Redistribution

                           samba security update
                               10 April 2019


        AusCERT Security Bulletin Summary

Product:           samba
Publisher:         Debian
Operating System:  Debian GNU/Linux 8
Impact/Access:     Administrator Compromise -- Existing Account      
                   Create Arbitrary Files   -- Existing Account      
                   Denial of Service        -- Remote/Unauthenticated
                   Access Confidential Data -- Existing Account      
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-3880 CVE-2018-1057 CVE-2018-1050

Reference:         ESB-2019.1178

Original Bulletin:

- --------------------------BEGIN INCLUDED TEXT--------------------

Package        : samba
Version        : 2:4.2.14+dfsg-0+deb8u12
CVE ID         : CVE-2017-9461 CVE-2018-1050 CVE-2018-1057 CVE-2019-3880

Various vulnerabilities were discovered in Samba, SMB/CIFS file, print,
and login server/client for Unix


    smbd in Samba had a denial of service vulnerability (fd_open_atomic
    infinite loop with high CPU usage and memory consumption) due to
    wrongly handling dangling symlinks.


    Samba was vulnerable to a denial of service attack when the RPC
    spoolss service was configured to be run as an external daemon.
    Missing input sanitization checks on some of the input parameters to
    spoolss RPC calls could have caused the print spooler service to


    On a Samba 4 AD DC the LDAP server of Samba incorrectly validated
    permissions to modify passwords over LDAP allowing authenticated
    users to change any other users' passwords, including administrative
    users and privileged service accounts (eg Domain Controllers).

    Thanks to the Ubuntu security team for having backported the rather
    invasive changeset to Samba in Ubuntu 14.04 (which we could use to
    patch Samba in Debian jessie LTS).


    A flaw was found in the way Samba implemented an RPC endpoint
    emulating the Windows registry service API. An unprivileged attacker
    could have used this flaw to create a new registry hive file anywhere
    they had unix permissions which could have lead to creation of a new
    file in the Samba share.

For Debian 8 "Jessie", these problems have been fixed in version

We recommend that you upgrade your samba packages.

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at:

mike gabriel aka sunweaver (Debian Developer)
fon: +49 (1520) 1976 148

GnuPG Fingerprint: 9BFB AEE8 6C0A A5FF BF22  0782 9AF4 6B30 2577 1B31

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

Australian Computer Emergency Response Team
The University of Queensland
Qld 4072

Internet Email:
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.


« Back to bulletins