VDB-243025 · CVE-2023-5568 · Nessus 276372

Samba up to 4.19.1 Heimdal KDC heap-based overflow

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.9	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Samba up to 4.19.1. This affects an unknown part of the component Heimdal KDC. This manipulation causes heap-based overflow. This vulnerability is registered as CVE-2023-5568. No exploit is available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Samba up to 4.19.1 (File Transfer Software). It has been declared as critical. Affected by this vulnerability is some unknown processing of the component Heimdal KDC. The manipulation with an unknown input leads to a heap-based overflow vulnerability. The CWE definition for the vulnerability is CWE-122. A heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc(). As an impact it is known to affect confidentiality, integrity, and availability.

The weakness was published 10/20/2023. The advisory is shared at bugzilla.redhat.com. This vulnerability is known as CVE-2023-5568 since 10/13/2023. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 276372 (TencentOS Server 4: samba (TSSA-2025:0015)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.19.2 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (276372). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

File Transfer Software

Name

Samba

Version

License

open-source

Website

Product: https://www.samba.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.0
VulDB Meta Temp Score: 5.9

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.5
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Heap-based overflow
CWE: CWE-122 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 276372
Nessus Name: TencentOS Server 4: samba (TSSA-2025:0015)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Samba 4.19.2

Timelineinfo

10/13/2023 🔍
10/20/2023 +7 days 🔍
10/20/2023 +0 days 🔍
11/23/2025 +765 days 🔍

Sourcesinfo

Product: samba.org

Advisory: bugzilla.redhat.com
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2023-5568 (🔍)
GCVE (CVE): GCVE-0-2023-5568
GCVE (VulDB): GCVE-100-243025

Entryinfo

Created: 10/20/2023 08:20
Updated: 11/23/2025 01:31
Changes: 10/20/2023 08:20 (40), 11/11/2023 20:06 (1), 11/11/2023 20:13 (21), 09/18/2024 10:32 (16), 11/23/2025 01:31 (3)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.