VDB-127371 · CVE-2018-7809 · GCVE-0-2018-7809

Modicon M340/Premium/Quantum PLCs/BMXNOR0200 Embedded Web Server password recovery

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.
8.5	$0-$5k	0.00

Summaryinfo

A vulnerability classified as critical has been found in Modicon M340, Premium, Quantum PLCs and BMXNOR0200. This affects an unknown part of the component Embedded Web Server. Performing a manipulation results in password recovery. This vulnerability is identified as CVE-2018-7809. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as critical, was found in Modicon M340, Premium, Quantum PLCs and BMXNOR0200 (SCADA Software) (version now known). This affects some unknown processing of the component Embedded Web Server. The manipulation with an unknown input leads to a password recovery vulnerability. CWE is classifying the issue as CWE-640. The product contains a mechanism for users to recover or change their passwords without knowing the original password, but the mechanism is weak. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

An Unverified Password Change vulnerability exists in the embedded web servers in all Modicon M340, Premium, Quantum PLCs and BMXNOR0200 which could allow an unauthenticated remote user to access the password delete function of the web server.

The bug was discovered 11/28/2018. The weakness was released 11/30/2018 (Website). It is possible to read the advisory at schneider-electric.com. This vulnerability is uniquely identified as CVE-2018-7809 since 03/08/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1552 according to MITRE ATT&CK.

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $0-$5k.

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

Entries connected to this vulnerability are available at VDB-127373, VDB-127372, VDB-127374 and VDB-127375. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

SCADA Software

Vendor

Modicon

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.5
VulDB Meta Temp Score: 8.5

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

NVD Base Score: 9.8
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

Class: Password recovery
CWE: CWE-640
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: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

03/08/2018 🔍
11/28/2018 +265 days 🔍
11/30/2018 +2 days 🔍
11/30/2018 +0 days 🔍
12/01/2018 +1 days 🔍
04/16/2020 +502 days 🔍

Sourcesinfo

Advisory: schneider-electric.com
Status: Not defined
Confirmation: 🔍

CVE: CVE-2018-7809 (🔍)
GCVE (CVE): GCVE-0-2018-7809
GCVE (VulDB): GCVE-100-127371
See also: 🔍

Entryinfo

Created: 12/01/2018 20:12
Updated: 04/16/2020 16:40
Changes: 12/01/2018 20:12 (57), 04/16/2020 16:40 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.