CVE-2015-5296

Severity CVSS v4.0:

Pending analysis

Type:

CWE-20 Input Validation

Publication date:

29/12/2015

Last modified:

12/04/2025

Description

Samba 3.x and 4.x before 4.1.22, 4.2.x before 4.2.7, and 4.3.x before 4.3.3 supports connections that are encrypted but unsigned, which allows man-in-the-middle attackers to conduct encrypted-to-unencrypted downgrade attacks by modifying the client-server data stream, related to clidfs.c, libsmb_server.c, and smbXcli_base.c.

Impact

Vector 3.x

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS v3.1 Severity and Metrics:

Base Score: 5.40 MEDIUM
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N

Attack Vector (AV): Network
Attack Complexity (AC): High
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Changed
Confidentiality (C): Low
Integrity (I): Low
Availability (A): None

Base Score 3.x

5.40

Severity 3.x

MEDIUM

Vector 2.0

AV:N/AC:M/Au:N/C:N/I:P/A:N CVSS v2.0 Severity and Metrics:

Base Score: 4.30 MEDIUM
Vector: AV:N/AC:M/Au:N/C:N/I:P/A:N

Attack Vector (AV): Network
Attack Complexity (AC): Medium
Authentication (Au): None
Confidentiality (C): None
Integrity (I): Physical
Availability (A): None

Base Score 2.0

4.30

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:samba:samba::::::::	3.2.0 (including)	4.1.22 (excluding)
cpe:2.3:a:samba:samba::::::::	4.2.0 (including)	4.2.7 (excluding)
cpe:2.3:a:samba:samba::::::::	4.3.0 (including)	4.3.3 (excluding)
cpe:2.3:o:debian:debian_linux:7.0:::::::*
cpe:2.3:o:debian:debian_linux:8.0:::::::*
cpe:2.3:o:canonical:ubuntu_linux:12.04::::-:::
cpe:2.3:o:canonical:ubuntu_linux:14.04::::esm:::
cpe:2.3:o:canonical:ubuntu_linux:15.04:::::::*
cpe:2.3:o:canonical:ubuntu_linux:15.10:::::::*

To consult the complete list of CPE names with products and versions, see this page

CVE-2015-5296

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools