VDB-244156 · CVE-2023-5871 · EUVD-2023-58145

libnbd up to 1.19.1 NDB Server nbd/server.c nbd_block_status denial of service

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.
4.3	$0-$5k	0.00

Summaryinfo

A vulnerability labeled as problematic has been found in libnbd up to 1.19.1. Affected by this vulnerability is the function nbd_block_status of the file nbd/server.c of the component NDB Server Handler. Executing a manipulation can lead to denial of service. This vulnerability is handled as CVE-2023-5871. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in libnbd up to 1.19.1 and classified as problematic. This vulnerability affects the function nbd_block_status of the file nbd/server.c of the component NDB Server Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was released 11/01/2023. The advisory is shared for download at lists.libguestfs.org. This vulnerability was named CVE-2023-5871 since 10/31/2023. There are known technical details, but no exploit is available.

Upgrading to version 1.19.2 eliminates this vulnerability. The upgrade is hosted for download at download.libguestfs.org. Applying the patch 177308adb17e81fce7c0f2b2fcf655c5c0b6a4d6 is able to eliminate this problem. The bugfix is ready for download at gitlab.com. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2023-58145). Once again VulDB remains the best source for vulnerability data.

Productinfo

Name

libnbd

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.4
VulDB Meta Temp Score: 4.3

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: libnbd 1.19.2
Patch: 177308adb17e81fce7c0f2b2fcf655c5c0b6a4d6

Timelineinfo

10/31/2023 🔍
11/01/2023 +1 days 🔍
11/01/2023 +0 days 🔍
09/13/2025 +682 days 🔍

Sourcesinfo

Advisory: lists.libguestfs.org
Status: Confirmed

CVE: CVE-2023-5871 (🔍)
GCVE (CVE): GCVE-0-2023-5871
GCVE (VulDB): GCVE-100-244156
EUVD: 🔍

Entryinfo

Created: 11/01/2023 06:57
Updated: 09/13/2025 04:49
Changes: 11/01/2023 06:57 (43), 11/29/2023 08:20 (1), 11/29/2023 08:22 (12), 09/13/2025 04:49 (16)
Complete: 🔍
Cache ID: 216::103