CVE-2016-2119 - Improper Access Control

Severity

68%

Complexity

86%

Confidentiality

106%

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.

libcli/smb/smbXcli_base.c in Samba 4.x before 4.2.14, 4.3.x before 4.3.11, and 4.4.x before 4.4.5 allows man-in-the-middle attackers to bypass a client-signing protection mechanism, and consequently spoof SMB2 and SMB3 servers, via the (1) SMB2_SESSION_FLAG_IS_GUEST or (2) SMB2_SESSION_FLAG_IS_NULL flag.

CVSS 3.0 Base Score 7.5. CVSS Attack Vector: network. CVSS Attack Complexity: high. CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H).

CVSS 2.0 Base Score 6.8. CVSS Attack Vector: network. CVSS Attack Complexity: medium. CVSS Vector: (AV:N/AC:M/Au:N/C:P/I:P/A:P).

Overview

Type

Samba

First reported 8 years ago

2016-07-07 15:59:00

Last updated 6 years ago

2018-10-21 10:29:00

Affected Software

Samba 4.0.0

4.0.0

Samba 4.0.1

4.0.1

Samba 4.0.2

4.0.2

Samba 4.0.3

4.0.3

Samba 4.0.4

4.0.4

Samba 4.0.5

4.0.5

Samba 4.0.6

4.0.6

Samba 4.0.7

4.0.7

Samba 4.0.8

4.0.8

Samba 4.0.9

4.0.9

Samba 4.0.10

4.0.10

Samba 4.0.11

4.0.11

Samba 4.0.12

4.0.12

Samba 4.0.13

4.0.13

Samba 4.0.14

4.0.14

Samba 4.0.15

4.0.15

Samba 4.0.16

4.0.16

Samba 4.0.17

4.0.17

Samba 4.0.18

4.0.18

Samba 4.0.19

4.0.19

Samba 4.0.20

4.0.20

Samba 4.0.21

4.0.21

Samba 4.0.22

4.0.22

Samba 4.0.23

4.0.23

Samba 4.0.24

4.0.24

Samba 4.0.25

4.0.25

Samba 4.0.26

4.0.26

Samba 4.1.0

4.1.0

Samba 4.1.1

4.1.1

Samba 4.1.2

4.1.2

Samba 4.1.3

4.1.3

Samba 4.1.4

4.1.4

Samba 4.1.5

4.1.5

Samba 4.1.6

4.1.6

Samba 4.1.7

4.1.7

Samba 4.1.8

4.1.8

Samba 4.1.9

4.1.9

Samba 4.1.10

4.1.10

Samba 4.1.11

4.1.11

Samba 4.1.12

4.1.12

Samba 4.1.13

4.1.13

Samba 4.1.14

4.1.14

Samba 4.1.15

4.1.15

Samba 4.1.16

4.1.16

Samba 4.1.17

4.1.17

Samba 4.1.18

4.1.18

Samba 4.1.19

4.1.19

Samba 4.1.20

4.1.20

Samba 4.1.21

4.1.21

Samba 4.1.22

4.1.22

Samba 4.1.23

4.1.23

Samba 4.2.0 release candidate 1

4.2.0

Samba 4.2.0 release candidate 2

4.2.0

Samba 4.2.0 release candidate 3

4.2.0

Samba 4.2.0 release candidate 4

4.2.0

Samba 4.2.1

4.2.1

Samba 4.2.2

4.2.2

Samba 4.2.3

4.2.3

Samba 4.2.4

4.2.4

Samba 4.2.5

4.2.5

Samba 4.2.6

4.2.6

Samba 4.2.7

4.2.7

Samba 4.2.8

4.2.8

Samba 4.2.10

4.2.10

Samba 4.2.11

4.2.11

Samba 4.2.12

4.2.12

Samba 4.2.13

4.2.13

Samba 4.2.14

4.2.14

Samba 4.3.0

4.3.0

Samba 4.3.1

4.3.1

Samba 4.3.2

4.3.2

Samba 4.3.3

4.3.3

Samba 4.3.4

4.3.4

Samba 4.3.5

4.3.5

Samba 4.3.6

4.3.6

Samba 4.3.8

4.3.8

Samba 4.3.9

4.3.9

Samba 4.3.10

4.3.10

Samba 4.3.11

4.3.11

Samba 4.4.0

4.4.0

Samba 4.4.0 Release Candidate 1

4.4.0

Samba 4.4.0 Release Candidate 2

4.4.0

Samba 4.4.0 Release Candidate 3

4.4.0

Samba 4.4.2

4.4.2

Samba 4.4.3

4.4.3

Samba 4.4.4

4.4.4

References

openSUSE-SU-2016:1830

RHSA-2016:1486

RHSA-2016:1487

RHSA-2016:1494

http://www.oracle.com/technetwork/topics/security/linuxbulletinjul2016-3090544.html

91700

1036244

GLSA-201805-07

https://www.samba.org/samba/security/CVE-2016-2119.html

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