CVE-2016-2126

Severity

40%

Complexity

80%

Confidentiality

48%

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

Samba version 4.0.0 up to 4.5.2 is vulnerable to privilege elevation due to incorrect handling of the PAC (Privilege Attribute Certificate) checksum. A remote, authenticated, attacker can cause the winbindd process to crash using a legitimate Kerberos ticket. A local service with access to the winbindd privileged pipe can cause winbindd to cache elevated access permissions.

CVSS 3.0 Base Score 6.5. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H).

CVSS 2.0 Base Score 4. CVSS Attack Vector: network. CVSS Attack Complexity: low. CVSS Vector: (AV:N/AC:L/Au:S/C:N/I:N/A:P).

Overview

Type

Samba

First reported 7 years ago

2017-05-11 14:29:00

Last updated 6 years ago

2018-05-11 01:29:00

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 4.2.9

4.2.9

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 4.3.7

4.3.7

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 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 4.4.1

4.4.1

Samba 4.4.2

4.4.2

Samba 4.4.3

4.4.3

Samba 4.4.4

4.4.4

Samba 4.4.5

4.4.5

Samba 4.4.6

4.4.6

Samba 4.4.7

4.4.7

Samba 4.4.8

4.4.8

Samba 4.4.9

4.4.9

Samba 4.4.10

4.4.10

Samba 4.4.11

4.4.11

Samba 4.4.12

4.4.12

Samba 4.4.13

4.4.13

Samba 4.4.14

4.4.14

Samba 4.4.15

4.4.15

Samba 4.5.0

4.5.0

Samba 4.5.1

4.5.1

Samba 4.5.2

4.5.2

References

RHSA-2017:0494

RHSA-2017:0495

RHSA-2017:0662

RHSA-2017:0744

94994

Third Party Advisory, VDB Entry

1037495

Third Party Advisory, VDB Entry

RHSA-2017:1265

https://kb.pulsesecure.net/articles/Pulse_Security_Advisories/SA43730

https://www.samba.org/samba/security/CVE-2016-2126.html

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