VDB-169629 · CVE-2021-25666 · ssa-686152

Siemens SCALANCE W740/SCALANCE W780 up to 6.2 ARP allocation of resources

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.
4.1	$0-$5k	0.00

Summaryinfo

A vulnerability was found in Siemens SCALANCE W740 and SCALANCE W780 up to 6.2. It has been classified as problematic. This impacts an unknown function of the component ARP Handler. Performing a manipulation results in allocation of resources. This vulnerability is cataloged as CVE-2021-25666. The attack must originate from the local network. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Siemens SCALANCE W740 and SCALANCE W780 up to 6.2. It has been classified as problematic. This affects an unknown code block of the component ARP Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability.

The weakness was shared 02/10/2021 as ssa-686152. The advisory is shared at cert-portal.siemens.com. This vulnerability is uniquely identified as CVE-2021-25666. Neither technical details nor an exploit are publicly available.

Upgrading to version 6.3 eliminates this vulnerability.

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Productinfo

Vendor

Siemens

Name

Version

License

commercial

Website

Vendor: https://www.siemens.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.2

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 4.3
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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Allocation of resources
CWE: CWE-770 / CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Partially

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: SCALANCE W740/SCALANCE W780 6.3

Timelineinfo

01/21/2021 🔍
02/10/2021 +20 days 🔍
02/10/2021 +0 days 🔍
02/27/2021 +17 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-686152
Status: Confirmed

CVE: CVE-2021-25666 (🔍)
GCVE (CVE): GCVE-0-2021-25666
GCVE (VulDB): GCVE-100-169629

Entryinfo

Created: 02/10/2021 11:59
Updated: 02/27/2021 11:06
Changes: 02/10/2021 11:59 (32), 02/10/2021 12:00 (1), 02/10/2021 12:01 (8), 02/27/2021 10:59 (2), 02/27/2021 11:06 (16)
Complete: 🔍
Cache ID: 216::103