USN-4559-1

See a problem?

Source

https://ubuntu.com/security/notices/USN-4559-1

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/usn/USN-4559-1.json

JSON Data

https://api.osv.dev/v1/vulns/USN-4559-1

Related

Published

2020-09-30T13:44:33.645901Z

Modified

2020-09-30T13:44:33.645901Z

Summary

samba update

Details

Tom Tervoort discovered that the Netlogon protocol implemented by Samba incorrectly handled the authentication scheme. A remote attacker could use this issue to forge an authentication token and steal the credentials of the domain admin.

While a previous security update fixed the issue by changing the "server schannel" setting to default to "yes", instead of "auto", which forced a secure netlogon channel, this update provides additional improvements.

For compatibility reasons with older devices, Samba now allows specifying an insecure netlogon configuration per machine. See the following link for examples: https://www.samba.org/samba/security/CVE-2020-1472.html

In addition, this update adds additional server checks for the protocol attack in the client-specified challenge to provide some protection when 'server schannel = no/auto' and avoid the false-positive results when running the proof-of-concept exploit.

References

Affected packages

Ubuntu:16.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.3.11+dfsg-0ubuntu0.16.04.31?arch=src?distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2:4.3.11+dfsg-0ubuntu0.16.04.31

Affected versions

2:4.*

2:4.1.17+dfsg-4ubuntu2

2:4.1.20+dfsg-1ubuntu1

2:4.1.20+dfsg-1ubuntu2

2:4.1.20+dfsg-1ubuntu3

2:4.1.20+dfsg-1ubuntu5

2:4.3.3+dfsg-1ubuntu1

2:4.3.3+dfsg-1ubuntu2

2:4.3.3+dfsg-1ubuntu3

2:4.3.6+dfsg-1ubuntu1

2:4.3.8+dfsg-0ubuntu1

2:4.3.9+dfsg-0ubuntu0.16.04.1

2:4.3.9+dfsg-0ubuntu0.16.04.2

2:4.3.9+dfsg-0ubuntu0.16.04.3

2:4.3.11+dfsg-0ubuntu0.16.04.1

2:4.3.11+dfsg-0ubuntu0.16.04.3

2:4.3.11+dfsg-0ubuntu0.16.04.5

2:4.3.11+dfsg-0ubuntu0.16.04.6

2:4.3.11+dfsg-0ubuntu0.16.04.7

2:4.3.11+dfsg-0ubuntu0.16.04.8

2:4.3.11+dfsg-0ubuntu0.16.04.9

2:4.3.11+dfsg-0ubuntu0.16.04.10

2:4.3.11+dfsg-0ubuntu0.16.04.11

2:4.3.11+dfsg-0ubuntu0.16.04.12

2:4.3.11+dfsg-0ubuntu0.16.04.13

2:4.3.11+dfsg-0ubuntu0.16.04.15

2:4.3.11+dfsg-0ubuntu0.16.04.16

2:4.3.11+dfsg-0ubuntu0.16.04.17

2:4.3.11+dfsg-0ubuntu0.16.04.18

2:4.3.11+dfsg-0ubuntu0.16.04.19

2:4.3.11+dfsg-0ubuntu0.16.04.20

2:4.3.11+dfsg-0ubuntu0.16.04.21

2:4.3.11+dfsg-0ubuntu0.16.04.23

2:4.3.11+dfsg-0ubuntu0.16.04.24

2:4.3.11+dfsg-0ubuntu0.16.04.25

2:4.3.11+dfsg-0ubuntu0.16.04.26

2:4.3.11+dfsg-0ubuntu0.16.04.27

2:4.3.11+dfsg-0ubuntu0.16.04.28

2:4.3.11+dfsg-0ubuntu0.16.04.29

2:4.3.11+dfsg-0ubuntu0.16.04.30

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "libwbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-libs": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "registry-tools": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-common-bin": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libwbclient0-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dsdb-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libpam-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libnss-winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-vfs-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-common-bin-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-testsuite": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "smbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libsmbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libsmbclient-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libwbclient0": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libparse-pidl-perl-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dsdb-modules": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "registry-tools-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-vfs-modules-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "python-samba": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "ctdb": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libsmbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libnss-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libsmbclient-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-libs-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dbg": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-testsuite-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-common": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "winbind-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libpam-winbind": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "smbclient": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libwbclient-dev-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "samba-dev": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "libparse-pidl-perl": "2:4.3.11+dfsg-0ubuntu0.16.04.31",
            "ctdb-dbgsym": "2:4.3.11+dfsg-0ubuntu0.16.04.31"
        }
    ]
}

Ubuntu:18.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.7.6+dfsg~ubuntu-0ubuntu2.20?arch=src?distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2:4.7.6+dfsg~ubuntu-0ubuntu2.20

Affected versions

2:4.*

2:4.6.7+dfsg-1ubuntu3

2:4.7.1+dfsg-1ubuntu1

2:4.7.3+dfsg-1ubuntu1

2:4.7.4+dfsg-1ubuntu1

2:4.7.6+dfsg~ubuntu-0ubuntu1

2:4.7.6+dfsg~ubuntu-0ubuntu2

2:4.7.6+dfsg~ubuntu-0ubuntu2.2

2:4.7.6+dfsg~ubuntu-0ubuntu2.4

2:4.7.6+dfsg~ubuntu-0ubuntu2.5

2:4.7.6+dfsg~ubuntu-0ubuntu2.6

2:4.7.6+dfsg~ubuntu-0ubuntu2.7

2:4.7.6+dfsg~ubuntu-0ubuntu2.9

2:4.7.6+dfsg~ubuntu-0ubuntu2.10

2:4.7.6+dfsg~ubuntu-0ubuntu2.11

2:4.7.6+dfsg~ubuntu-0ubuntu2.13

2:4.7.6+dfsg~ubuntu-0ubuntu2.14

2:4.7.6+dfsg~ubuntu-0ubuntu2.15

2:4.7.6+dfsg~ubuntu-0ubuntu2.16

2:4.7.6+dfsg~ubuntu-0ubuntu2.17

2:4.7.6+dfsg~ubuntu-0ubuntu2.18

2:4.7.6+dfsg~ubuntu-0ubuntu2.19

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "libwbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-libs": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "registry-tools": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-common-bin": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libwbclient0-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-dsdb-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libpam-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libnss-winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-vfs-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "python-samba-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-common-bin-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-testsuite": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "smbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libsmbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libwbclient0": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libsmbclient-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "python-samba": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-dsdb-modules": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "registry-tools-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-vfs-modules-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "ctdb": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libnss-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libsmbclient-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-libs-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "winbind-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-testsuite-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-common": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libpam-winbind": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "smbclient": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "samba-dev": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "libparse-pidl-perl": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20",
            "ctdb-dbgsym": "2:4.7.6+dfsg~ubuntu-0ubuntu2.20"
        }
    ]
}

Ubuntu:20.04:LTS / samba

Package

Name: samba
Purl: pkg:deb/ubuntu/samba@2:4.11.6+dfsg-0ubuntu1.5?arch=src?distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2:4.11.6+dfsg-0ubuntu1.5

Affected versions

2:4.*

2:4.10.7+dfsg-0ubuntu2

2:4.10.7+dfsg-0ubuntu3

2:4.11.1+dfsg-3ubuntu1

2:4.11.1+dfsg-3ubuntu2

2:4.11.1+dfsg-3ubuntu4

2:4.11.5+dfsg-1ubuntu1

2:4.11.5+dfsg-1ubuntu2

2:4.11.6+dfsg-0ubuntu1

2:4.11.6+dfsg-0ubuntu1.1

2:4.11.6+dfsg-0ubuntu1.2

2:4.11.6+dfsg-0ubuntu1.3

2:4.11.6+dfsg-0ubuntu1.4

Ecosystem specific

{
    "availability": "No subscription required",
    "binaries": [
        {
            "libwbclient-dev": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-libs": "2:4.11.6+dfsg-0ubuntu1.5",
            "registry-tools": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-common-bin": "2:4.11.6+dfsg-0ubuntu1.5",
            "libwbclient0-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-dsdb-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "libpam-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "libnss-winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "python3-samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "winbind": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-vfs-modules": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-common-bin-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-testsuite": "2:4.11.6+dfsg-0ubuntu1.5",
            "smbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "libsmbclient": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba": "2:4.11.6+dfsg-0ubuntu1.5",
            "libsmbclient-dev": "2:4.11.6+dfsg-0ubuntu1.5",
            "libwbclient0": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-dsdb-modules": "2:4.11.6+dfsg-0ubuntu1.5",
            "python3-samba": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-vfs-modules-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "registry-tools-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "ctdb": "2:4.11.6+dfsg-0ubuntu1.5",
            "libnss-winbind": "2:4.11.6+dfsg-0ubuntu1.5",
            "libsmbclient-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-libs-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "winbind-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-testsuite-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-common": "2:4.11.6+dfsg-0ubuntu1.5",
            "libpam-winbind": "2:4.11.6+dfsg-0ubuntu1.5",
            "smbclient": "2:4.11.6+dfsg-0ubuntu1.5",
            "samba-dev": "2:4.11.6+dfsg-0ubuntu1.5",
            "ctdb-dbgsym": "2:4.11.6+dfsg-0ubuntu1.5"
        }
    ]
}