FreeBSD : samba -- multiple vulnerabilities (a636fc26-00d9-11e6-b704-000c292e4fd8) (Badlock)

high Nessus Plugin ID 90474
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Synopsis

The remote FreeBSD host is missing one or more security-related updates.

Description

Samba team reports :

[CVE-2015-5370] Errors in Samba DCE-RPC code can lead to denial of service (crashes and high cpu consumption) and man in the middle attacks.

[CVE-2016-2110] The feature negotiation of NTLMSSP is not downgrade protected. A man in the middle is able to clear even required flags, especially NTLMSSP_NEGOTIATE_SIGN and NTLMSSP_NEGOTIATE_SEAL.

[CVE-2016-2111] When Samba is configured as Domain Controller it allows remote attackers to spoof the computer name of a secure channel's endpoints, and obtain sensitive session information, by running a crafted application and leveraging the ability to sniff network traffic.

[CVE-2016-2112] A man in the middle is able to downgrade LDAP connections to no integrity protection.

[CVE-2016-2113] Man in the middle attacks are possible for client triggered LDAP connections (with ldaps://) and ncacn_http connections (with https://).

[CVE-2016-2114] Due to a bug Samba doesn't enforce required smb signing, even if explicitly configured.

[CVE-2016-2115] The protection of DCERPC communication over ncacn_np (which is the default for most the file server related protocols) is inherited from the underlying SMB connection.

[CVE-2016-2118] a.k.a. BADLOCK. A man in the middle can intercept any DCERPC traffic between a client and a server in order to impersonate the client and get the same privileges as the authenticated user account. This is most problematic against active directory domain controllers.

Solution

Update the affected packages.

See Also

https://www.samba.org/samba/security/CVE-2015-5370.html

https://www.samba.org/samba/security/CVE-2016-2110.html

https://www.samba.org/samba/security/CVE-2016-2111.html

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

https://www.samba.org/samba/security/CVE-2016-2113.html

https://www.samba.org/samba/security/CVE-2016-2114.html

https://www.samba.org/samba/security/CVE-2016-2115.html

https://www.samba.org/samba/security/CVE-2016-2118.html

http://www.nessus.org/u?c5a3a7ed

Plugin Details

Severity: High

ID: 90474

File Name: freebsd_pkg_a636fc2600d911e6b704000c292e4fd8.nasl

Version: 2.12

Type: local

Published: 4/13/2016

Updated: 1/4/2021

Dependencies: ssh_get_info.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Vector: AV:N/AC:M/Au:N/C:P/I:P/A:P

CVSS v3

Risk Factor: High

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: p-cpe:/a:freebsd:freebsd:samba36, p-cpe:/a:freebsd:freebsd:samba4, p-cpe:/a:freebsd:freebsd:samba41, p-cpe:/a:freebsd:freebsd:samba42, p-cpe:/a:freebsd:freebsd:samba43, p-cpe:/a:freebsd:freebsd:samba44, cpe:/o:freebsd:freebsd

Required KB Items: Host/local_checks_enabled, Host/FreeBSD/release, Host/FreeBSD/pkg_info

Patch Publication Date: 4/12/2016

Vulnerability Publication Date: 4/12/2016

Reference Information

CVE: CVE-2015-5370, CVE-2016-2110, CVE-2016-2111, CVE-2016-2112, CVE-2016-2113, CVE-2016-2114, CVE-2016-2115, CVE-2016-2118