VDB-135380 · CVE-2019-6821 · BID 108366

Schneider Electric Modicon M580 TCP Connection TCP Sequence random values

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.
7.2	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical was found in Schneider Electric Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium. This vulnerability affects unknown code. Such manipulation as part of TCP Connection leads to random values (TCP Sequence). This vulnerability is referenced as CVE-2019-6821. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as critical, has been found in Schneider Electric Modicon M580, Modicon M340, Modicon Quantum and Modicon Premium (SCADA Software) (version unknown). Affected by this issue is an unknown function. The manipulation as part of a TCP Connection leads to a random values vulnerability (TCP Sequence). Using CWE to declare the problem leads to CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. Impacted is confidentiality, integrity, and availability. CVE summarizes:

CWE-330: Use of Insufficiently Random Values vulnerability, which could cause the hijacking of the TCP connection when using Ethernet communication in Modicon M580 firmware versions prior to V2.30, and all firmware versions of Modicon M340, Modicon Premium, Modicon Quantum.

The weakness was published 05/22/2019 (Website). The advisory is shared for download at securityfocus.com. This vulnerability is handled as CVE-2019-6821 since 01/25/2019. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1600.001.

Upgrading eliminates this vulnerability.

Similar entry is available at VDB-135378. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

SCADA Software

Vendor

Schneider Electric

Name

License

commercial

Website

Vendor: https://www.schneider-electric.com/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.4
VulDB Meta Temp Score: 7.2

VulDB Base Score: 7.3
VulDB Temp Score: 7.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

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: 🔍

NVD Base Score: 🔍

Exploitinginfo

Name: TCP Sequence
Class: Random values / TCP Sequence
CWE: CWE-330 / CWE-310
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: 🔍

Timelineinfo

01/25/2019 🔍
05/22/2019 +117 days 🔍
05/23/2019 +1 days 🔍
09/24/2023 +1585 days 🔍

Sourcesinfo

Vendor: schneider-electric.com

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2019-6821 (🔍)
GCVE (CVE): GCVE-0-2019-6821
GCVE (VulDB): GCVE-100-135380
SecurityFocus: 108366

See also: 🔍

Entryinfo

Created: 05/23/2019 12:32
Updated: 09/24/2023 07:29
Changes: 05/23/2019 12:32 (57), 06/14/2020 17:44 (1), 09/24/2023 07:29 (4)
Complete: 🔍
Cache ID: 216::103