VDB-133264 · CVE-2019-3940 · BID 107847

Advantech WebAccess 8.3.4 File Upload RPC Call unrestricted upload

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-$5k0.00

Summaryinfo

A vulnerability described as critical has been identified in Advantech WebAccess 8.3.4. Affected is an unknown function of the component File Upload. Executing a manipulation as part of RPC Call can lead to unrestricted upload. The identification of this vulnerability is CVE-2019-3940. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical was found in Advantech WebAccess 8.3.4 (SCADA Software). This vulnerability affects an unknown code block of the component File Upload. The manipulation as part of a RPC Call leads to a unrestricted upload vulnerability. The CWE definition for the vulnerability is CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Advantech WebAccess 8.3.4 is vulnerable to file upload attacks via unauthenticated RPC call. An unauthenticated, remote attacker can use this vulnerability to execute arbitrary code.

The bug was discovered 04/04/2018. The weakness was shared 04/09/2019 (Website). The advisory is shared for download at securityfocus.com. This vulnerability was named CVE-2019-3940 since 01/03/2019. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1608.002.

The vulnerability was handled as a non-public zero-day exploit for at least 370 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.

The entry VDB-133265 is related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Type

Vendor

Name

Version

License

Website

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

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Unrestricted upload
CWE: CWE-434 / CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/04/2018 🔍
01/03/2019 +274 days 🔍
04/09/2019 +96 days 🔍
04/10/2019 +1 days 🔍
08/28/2023 +1601 days 🔍

Sourcesinfo

Vendor: advantech.com

Advisory: securityfocus.com⛔
Status: Not defined

CVE: CVE-2019-3940 (🔍)
GCVE (CVE): GCVE-0-2019-3940
GCVE (VulDB): GCVE-100-133264
SecurityFocus: 107847

See also: 🔍

Entryinfo

Created: 04/10/2019 09:18
Updated: 08/28/2023 09:52
Changes: 04/10/2019 09:18 (57), 05/28/2020 15:37 (2), 08/28/2023 09:52 (3)
Complete: 🔍
Cache ID: 216::103

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

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