8.8
HIGH
CVE-2016-2123
Samba Integer Wrap Remote Privilege Escalation Vulnerability
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.

INFO

Published Date :

Nov. 1, 2018, 1:29 p.m.

Last Modified :

Feb. 8, 2024, 2:10 a.m.

Remotely Exploitable :

Yes !

Impact Score :

5.9

Exploitability Score :

2.8
Affected Products

The following products are affected by CVE-2016-2123 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Samba samba
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2016-2123.

URL Resource
http://www.securityfocus.com/bid/94970 Third Party Advisory VDB Entry
http://www.securitytracker.com/id/1037493 Third Party Advisory VDB Entry
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123 Issue Tracking
https://www.samba.org/samba/security/CVE-2016-2123.html Patch Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2016-2123 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2016-2123 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • Modified Analysis by [email protected]

    Feb. 08, 2024

    Action Type Old Value New Value
  • CVE Modified by [email protected]

    Feb. 12, 2023

    Action Type Old Value New Value
    Removed CVSS V2 Red Hat, Inc. (AV:A/AC:M/Au:N/C:C/I:C/A:C)
    Removed CVSS V2 Reason AC-Assessment performed prior to CVMAP efforts
    Removed CVSS V2 Reason AV-Assessment performed prior to CVMAP efforts
    Removed CVSS V2 Reason C-Assessment performed prior to CVMAP efforts
    Removed CVSS V2 Reason Au-Assessment performed prior to CVMAP efforts
    Removed CVSS V2 Reason A-Assessment performed prior to CVMAP efforts
    Removed CVSS V2 Reason I-Assessment performed prior to CVMAP efforts
  • Modified Analysis by [email protected]

    Aug. 29, 2022

    Action Type Old Value New Value
    Removed CVSS V3 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Added CVSS V3.1 NIST AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed CPE Configuration OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (including) 4.5.2 OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (including) 4.0.26 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.1.0 up to (including) 4.1.23 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.2.0 up to (including) 4.2.14 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.3.0 up to (excluding) 4.3.13 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.4.0 up to (excluding) 4.4.8 *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.5.0 up to (excluding) 4.5.3
  • CVE Modified by [email protected]

    Mar. 11, 2020

    Action Type Old Value New Value
    Added CVSS V2 Red Hat, Inc. (AV:A/AC:M/Au:N/C:C/I:C/A:C)
  • CVE Modified by [email protected]

    Oct. 09, 2019

    Action Type Old Value New Value
    Added CVSS V3 Red Hat, Inc. AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
    Added CWE Red Hat, Inc. CWE-122
  • Initial Analysis by [email protected]

    Jan. 29, 2019

    Action Type Old Value New Value
    Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P)
    Added CVSS V3 AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
    Changed Reference Type http://www.securityfocus.com/bid/94970 No Types Assigned http://www.securityfocus.com/bid/94970 Third Party Advisory, VDB Entry
    Changed Reference Type https://www.samba.org/samba/security/CVE-2016-2123.html No Types Assigned https://www.samba.org/samba/security/CVE-2016-2123.html Patch, Vendor Advisory
    Changed Reference Type https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123 No Types Assigned https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-2123 Issue Tracking
    Changed Reference Type http://www.securitytracker.com/id/1037493 No Types Assigned http://www.securitytracker.com/id/1037493 Third Party Advisory, VDB Entry
    Added CWE CWE-119
    Added CPE Configuration OR *cpe:2.3:a:samba:samba:*:*:*:*:*:*:*:* versions from (including) 4.0.0 up to (including) 4.5.2
  • CVE Modified by [email protected]

    Nov. 02, 2018

    Action Type Old Value New Value
    Added Reference http://www.securitytracker.com/id/1037493 [No Types Assigned]
    Added Reference http://www.securityfocus.com/bid/94970 [No Types Assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2016-2123 is associated with the following CWEs:

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

94.14 }} -0.69%

score

0.99201

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability