VDB-270464 · CVE-2024-27459 · GCVE-0-2024-27459

OpenVPN up to 2.6.9 Data stack-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.
6.8	$0-$5k	0.00

Summaryinfo

A vulnerability described as critical has been identified in OpenVPN up to 2.6.9. The impacted element is an unknown function of the component Data Handler. Such manipulation leads to stack-based overflow. This vulnerability is traded as CVE-2024-27459. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in OpenVPN up to 2.6.9 and classified as critical. Affected by this issue is an unknown code block of the component Data Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. Using CWE to declare the problem leads to CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). Impacted is confidentiality, integrity, and availability. CVE summarizes:

The interactive service in OpenVPN 2.6.9 and earlier allows an attacker to send data causing a stack overflow which can be used to execute arbitrary code with more privileges.

The advisory is shared for download at community.openvpn.net. This vulnerability is handled as CVE-2024-27459 since 03/12/2024. The exploitation is known to be easy. There are neither technical details nor an exploit publicly available.

Upgrading to version 2.6.10 eliminates this vulnerability. The upgrade is hosted for download at mail-archive.com.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Network Encryption Software

Name

OpenVPN

Version

License

open-source

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.8

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

NVD Base Score: 7.8
NVD Vector: 🔍

CNA Base Score: 7.2
CNA Vector (OpenVPN): 🔍

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: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
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: OpenVPN 2.6.10

Timelineinfo

03/12/2024 🔍
07/08/2024 +117 days 🔍
07/08/2024 +0 days 🔍
03/06/2025 +241 days 🔍

Sourcesinfo

Advisory: community.openvpn.net
Status: Confirmed

CVE: CVE-2024-27459 (🔍)
GCVE (CVE): GCVE-0-2024-27459
GCVE (VulDB): GCVE-100-270464

Entryinfo

Created: 07/08/2024 14:20
Updated: 03/06/2025 10:30
Changes: 07/08/2024 14:20 (53), 07/09/2024 06:37 (1), 07/12/2024 00:52 (12), 08/23/2024 19:23 (11), 03/06/2025 10:27 (3), 03/06/2025 10:30 (3)
Complete: 🔍
Committer: lywand
Cache ID: 216::103