CVE-2016-2123

Severity CVSS v4.0:

Pending analysis

Type:

CWE-122 Heap-based Buffer Overflow

Publication date:

01/11/2018

Last modified:

08/02/2024

Description

A flaw was found in samba versions 4.0.0 to 4.5.2. The Samba routine ndr_pull_dnsp_name contains an integer wrap problem, leading to an attacker-controlled memory overwrite. ndr_pull_dnsp_name parses data from the Samba Active Directory ldb database. Any user who can write to the dnsRecord attribute over LDAP can trigger this memory corruption. By default, all authenticated LDAP users can write to the dnsRecord attribute on new DNS objects. This makes the defect a remote privilege escalation.

Impact

Vector 3.x

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

Base Score: 8.80 HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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

Base Score 3.x

8.80

Severity 3.x

HIGH

Vector 2.0

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

Base Score: 6.50 MEDIUM
Vector: AV:N/AC:L/Au:S/C:P/I:P/A:P

Attack Vector (AV): Network
Attack Complexity (AC): Low
Authentication (Au): Single
Confidentiality (C): Physical
Integrity (I): Physical
Availability (A): Physical

Base Score 2.0

6.50

Severity 2.0

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:samba:samba::::::::	4.0.0 (including)	4.0.26 (including)
cpe:2.3:a:samba:samba::::::::	4.1.0 (including)	4.1.23 (including)
cpe:2.3:a:samba:samba::::::::	4.2.0 (including)	4.2.14 (including)
cpe:2.3:a:samba:samba::::::::	4.3.0 (including)	4.3.13 (excluding)
cpe:2.3:a:samba:samba::::::::	4.4.0 (including)	4.4.8 (excluding)
cpe:2.3:a:samba:samba::::::::	4.5.0 (including)	4.5.3 (excluding)

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

CVE-2016-2123

Description

Impact

Vulnerable products and versions

References to Advisories, Solutions, and Tools