VDB-237105 · CVE-2023-39908 · EUVD-2023-43608

Yubico YubiHSM 2 SDK up to 2023.01 PKCS11 uninitialized pointer

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.
5.5	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Yubico YubiHSM 2 SDK up to 2023.01. Affected by this vulnerability is an unknown functionality of the component PKCS11 Module. Performing a manipulation results in uninitialized pointer. This vulnerability is known as CVE-2023-39908. No exploit is available.

Detailsinfo

A vulnerability classified as problematic has been found in Yubico YubiHSM 2 SDK up to 2023.01. This affects an unknown functionality of the component PKCS11 Module. The manipulation with an unknown input leads to a uninitialized pointer vulnerability. CWE is classifying the issue as CWE-824. The product accesses or uses a pointer that has not been initialized. This is going to have an impact on confidentiality. The summary by CVE is:

The PKCS11 module of the YubiHSM 2 SDK through 2023.01 does not properly validate the length of specific read operations on object metadata. This may lead to disclosure of uninitialized and previously used memory.

The weakness was published 08/14/2023. The advisory is shared at yubico.com. This vulnerability is uniquely identified as CVE-2023-39908 since 08/07/2023. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 269987 (Yubico YubiHSM 2 SDK YubiHSM Shell 2.4.0 Uninitialized Memory Read (YSA-2023-01)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (269987) and EUVD (EUVD-2023-43608). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Vendor

Yubico

Name

YubiHSM 2 SDK

Version

2023.01

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.5

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

NVD Base Score: 7.5
NVD Vector: 🔍

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: Uninitialized pointer
CWE: CWE-824 / CWE-908
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: 269987
Nessus Name: Yubico YubiHSM 2 SDK YubiHSM Shell 2.4.0 Uninitialized Memory Read (YSA-2023-01)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/07/2023 🔍
08/14/2023 +7 days 🔍
08/14/2023 +0 days 🔍
01/26/2026 +896 days 🔍

Sourcesinfo

Advisory: yubico.com
Status: Confirmed

CVE: CVE-2023-39908 (🔍)
GCVE (CVE): GCVE-0-2023-39908
GCVE (VulDB): GCVE-100-237105
EUVD: 🔍

Entryinfo

Created: 08/14/2023 21:57
Updated: 01/26/2026 13:49
Changes: 08/14/2023 21:57 (37), 09/09/2023 08:13 (11), 10/11/2025 07:42 (17), 01/26/2026 13:49 (1)
Complete: 🔍
Cache ID: 216::103

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