medium
5.9
CWE
254
Advisory Published
Updated

CVE-2016-2112

First published: Mon Apr 25 2016(Updated: )

The bundled LDAP client library 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 does not recognize the "client ldap sasl wrapping" setting, which allows man-in-the-middle attackers to perform LDAP protocol-downgrade attacks by modifying the client-server data stream.

Credit: secalert@redhat.com

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

Remedy

https://www.samba.org/samba/security/CVE-2016-2112.html

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2016-2112?

    CVE-2016-2112 has been rated as a high severity vulnerability due to its potential for man-in-the-middle attacks.

  • How do I fix CVE-2016-2112?

    To mitigate CVE-2016-2112, upgrade your Samba installation to version 4.2.11, 4.3.8, or 4.4.2 or later.

  • Which versions of Samba are affected by CVE-2016-2112?

    CVE-2016-2112 affects Samba versions 3.x and 4.x before 4.2.11, 4.3.x before 4.3.8, and 4.4.x before 4.4.2.

  • What kind of attack does CVE-2016-2112 allow?

    CVE-2016-2112 allows attackers to perform LDAP protocol-downgrade attacks by modifying the client-server data stream.

  • Is there a workaround for CVE-2016-2112 if I cannot update Samba?

    If you cannot update, you may temporarily restrict access to LDAP services to trusted networks to reduce exposure to CVE-2016-2112.

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