CVE-2016-2110: Medium severity Samba Samba vulnerability

Published Apr 25, 2016
·
Updated

The NTLMSSP authentication implementation in Samba 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2 allows man-in-the-middle attackers to perform protocol-downgrade attacks by modifying the client-server data stream to remove application-layer flags or encryption settings, as demonstrated by clearing the NTLMSSPNEGOTIATESEAL or NTLMSSPNEGOTIATESIGN option to disrupt LDAP security.

Affected Software

251 affected components
Samba Samba=3.0.0
Samba Samba=3.0.1
Samba Samba=3.0.2
Samba Samba=3.0.2-a
Samba Samba=3.0.2a
Samba Samba=3.0.3
Samba Samba=3.0.4
Samba Samba=3.0.4-rc1
Samba Samba=3.0.5
Samba Samba=3.0.6
Samba Samba=3.0.7
Samba Samba=3.0.8
Samba Samba=3.0.9
Samba Samba=3.0.10
Samba Samba=3.0.11
Samba Samba=3.0.12
Samba Samba=3.0.13
Samba Samba=3.0.14
Samba Samba=3.0.14-a
Samba Samba=3.0.14a
Samba Samba=3.0.15
Samba Samba=3.0.16
Samba Samba=3.0.17
Samba Samba=3.0.18
Samba Samba=3.0.19
Samba Samba=3.0.20
Samba Samba=3.0.20-a
Samba Samba=3.0.20-b
Samba Samba=3.0.20a
Samba Samba=3.0.20b
Samba Samba=3.0.21
Samba Samba=3.0.21-a
Samba Samba=3.0.21-b
Samba Samba=3.0.21-c
Samba Samba=3.0.21a
Samba Samba=3.0.21b
Samba Samba=3.0.21c
Samba Samba=3.0.22
Samba Samba=3.0.23
Samba Samba=3.0.23-a
Samba Samba=3.0.23-b
Samba Samba=3.0.23-c
Samba Samba=3.0.23-d
Samba Samba=3.0.23a
Samba Samba=3.0.23b
Samba Samba=3.0.23c
Samba Samba=3.0.23d
Samba Samba=3.0.24
Samba Samba=3.0.25
Samba Samba=3.0.25-a
Samba Samba=3.0.25-b
Samba Samba=3.0.25-c
Samba Samba=3.0.25-pre1
Samba Samba=3.0.25-pre2
Samba Samba=3.0.25-rc1
Samba Samba=3.0.25-rc2
Samba Samba=3.0.25-rc3
Samba Samba=3.0.25a
Samba Samba=3.0.25b
Samba Samba=3.0.25c
Samba Samba=3.0.26
Samba Samba=3.0.26-a
Samba Samba=3.0.26a
Samba Samba=3.0.27
Samba Samba=3.0.27-a
Samba Samba=3.0.28
Samba Samba=3.0.28-a
Samba Samba=3.0.29
Samba Samba=3.0.30
Samba Samba=3.0.31
Samba Samba=3.0.32
Samba Samba=3.0.33
Samba Samba=3.0.34
Samba Samba=3.0.35
Samba Samba=3.0.36
Samba Samba=3.0.37
Samba Samba=3.2.0
Samba Samba=3.2.1
Samba Samba=3.2.2
Samba Samba=3.2.3
Samba Samba=3.2.4
Samba Samba=3.2.5
Samba Samba=3.2.6
Samba Samba=3.2.7
Samba Samba=3.2.8
Samba Samba=3.2.9
Samba Samba=3.2.10
Samba Samba=3.2.11
Samba Samba=3.2.12
Samba Samba=3.2.13
Samba Samba=3.2.14
Samba Samba=3.2.15
Samba Samba=3.3.0
Samba Samba=3.3.1
Samba Samba=3.3.2
Samba Samba=3.3.3
Samba Samba=3.3.4
Samba Samba=3.3.5
Samba Samba=3.3.6
Samba Samba=3.3.7
Samba Samba=3.3.8
Samba Samba=3.3.9
Samba Samba=3.3.10
Samba Samba=3.3.11
Samba Samba=3.3.12
Samba Samba=3.3.13
Samba Samba=3.3.14
Samba Samba=3.3.15
Samba Samba=3.3.16
Samba Samba=3.4.0
Samba Samba=3.4.1
Samba Samba=3.4.2
Samba Samba=3.4.3
Samba Samba=3.4.4
Samba Samba=3.4.5
Samba Samba=3.4.6
Samba Samba=3.4.7
Samba Samba=3.4.8
Samba Samba=3.4.9
Samba Samba=3.4.10
Samba Samba=3.4.11
Samba Samba=3.4.12
Samba Samba=3.4.13
Samba Samba=3.4.14
Samba Samba=3.4.15
Samba Samba=3.4.16
Samba Samba=3.4.17
Samba Samba=3.5.0
Samba Samba=3.5.1
Samba Samba=3.5.2
Samba Samba=3.5.3
Samba Samba=3.5.4
Samba Samba=3.5.5
Samba Samba=3.5.6
Samba Samba=3.5.7
Samba Samba=3.5.8
Samba Samba=3.5.9
Samba Samba=3.5.10
Samba Samba=3.5.11
Samba Samba=3.5.12
Samba Samba=3.5.13
Samba Samba=3.5.14
Samba Samba=3.5.15
Samba Samba=3.5.16
Samba Samba=3.5.17
Samba Samba=3.5.18
Samba Samba=3.5.19
Samba Samba=3.5.20
Samba Samba=3.5.21
Samba Samba=3.5.22
Samba Samba=3.6.0
Samba Samba=3.6.1
Samba Samba=3.6.2
Samba Samba=3.6.3
Samba Samba=3.6.4
Samba Samba=3.6.5
Samba Samba=3.6.6
Samba Samba=3.6.7
Samba Samba=3.6.8
Samba Samba=3.6.9
Samba Samba=3.6.10
Samba Samba=3.6.11
Samba Samba=3.6.12
Samba Samba=3.6.13
Samba Samba=3.6.14
Samba Samba=3.6.15
Samba Samba=3.6.16
Samba Samba=3.6.17
Samba Samba=3.6.18
Samba Samba=3.6.19
Samba Samba=3.6.20
Samba Samba=3.6.21
Samba Samba=3.6.22
Samba Samba=3.6.23
Samba Samba=3.6.24
Samba Samba=3.6.25
Samba Samba=4.0.0
Samba Samba=4.0.1
Samba Samba=4.0.2
Samba Samba=4.0.3
Samba Samba=4.0.4
Samba Samba=4.0.5
Samba Samba=4.0.6
Samba Samba=4.0.7
Samba Samba=4.0.8
Samba Samba=4.0.9
Samba Samba=4.0.10
Samba Samba=4.0.11
Samba Samba=4.0.12
Samba Samba=4.0.13
Samba Samba=4.0.14
Samba Samba=4.0.15
Samba Samba=4.0.16
Samba Samba=4.0.17
Samba Samba=4.0.18
Samba Samba=4.0.19
Samba Samba=4.0.20
Samba Samba=4.0.21
Samba Samba=4.0.22
Samba Samba=4.0.23
Samba Samba=4.0.24
Samba Samba=4.0.25
Samba Samba=4.0.26
Samba Samba=4.1.0
Samba Samba=4.1.1
Samba Samba=4.1.2
Samba Samba=4.1.3
Samba Samba=4.1.4
Samba Samba=4.1.5
Samba Samba=4.1.6
Samba Samba=4.1.7
Samba Samba=4.1.8
Samba Samba=4.1.9
Samba Samba=4.1.10
Samba Samba=4.1.11
Samba Samba=4.1.12
Samba Samba=4.1.13
Samba Samba=4.1.14
Samba Samba=4.1.15
Samba Samba=4.1.16
Samba Samba=4.1.17
Samba Samba=4.1.18
Samba Samba=4.1.19
Samba Samba=4.1.20
Samba Samba=4.1.21
Samba Samba=4.1.22
Samba Samba=4.1.23
Samba Samba=4.2.0-rc1
Samba Samba=4.2.0-rc2
Samba Samba=4.2.0-rc3
Samba Samba=4.2.0-rc4
Samba Samba=4.2.1
Samba Samba=4.2.2
Samba Samba=4.2.3
Samba Samba=4.2.4
Samba Samba=4.2.5
Samba Samba=4.2.6
Samba Samba=4.2.7
Samba Samba=4.2.8
Samba Samba=4.2.9
Samba Samba=4.3.0
Samba Samba=4.3.1
Samba Samba=4.3.2
Samba Samba=4.3.3
Samba Samba=4.3.4
Samba Samba=4.3.5
Samba Samba=4.3.6
Samba Samba=4.4.0
Canonical Ubuntu Linux=14.04
Canonical Ubuntu Linux=15.10
Canonical Ubuntu Linux=16.04

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade Samba to a version that resolves this vulnerability.

    Fixed in 4.2.11
  2. Upgrade

    Upgrade Samba to a version that resolves this vulnerability.

    Fixed in 4.3.8
  3. Upgrade

    Upgrade Samba to a version that resolves this vulnerability.

    Fixed in 4.4.2

Event History

Apr 25, 2016
CVE Published
via MITRE·12:00 AM
Data Sourced
via MITRE·12:00 AM
Description
Data Sourced
via NVD·12:59 AM
RemedyDescriptionSeverityWeaknessAffected Software

Frequently Asked Questions

1

What is the severity of CVE-2016-2110?

CVE-2016-2110 has a CVSS score of 5.1, indicating medium severity.

2

How do I fix CVE-2016-2110?

To mitigate CVE-2016-2110, upgrade Samba to version 4.2.11 or above, 4.3.8 or above, or 4.4.2 or above.

3

What are the affected versions in CVE-2016-2110?

CVE-2016-2110 affects Samba versions prior to 4.2.11, 4.3.8, and 4.4.2.

4

What type of attack does CVE-2016-2110 facilitate?

CVE-2016-2110 allows man-in-the-middle attackers to conduct protocol-downgrade attacks.

5

Is CVE-2016-2110 associated with a specific feature in Samba?

CVE-2016-2110 is related to the NTLMSSP authentication implementation in Samba.

Company

Resources

Contact

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