VDB-93741 · CVE-2016-8673 · BID 94460

Siemens SIMATIC S7-400 Web Interface cross-site request forgery

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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8.8$5k-$25k0.00

A vulnerability was found in Siemens SIMATIC CP 343-1, SIMATIC CP 443-1, SIMATIC S7-300 and SIMATIC S7-400 (SCADA Software) (the affected version is unknown). It has been classified as critical. This affects an unknown code of the component Web Interface. The manipulation with an unknown input leads to a cross-site request forgery vulnerability. CWE is classifying the issue as CWE-352. The web application does not, or can not, sufficiently verify whether a well-formed, valid, consistent request was intentionally provided by the user who submitted the request. This is going to have an impact on confidentiality, integrity, and availability.

The bug was discovered 11/21/2016. The weakness was released 11/21/2016 by Andrea Barisani as Web vulnerabilities in Siemens S7-300/S7-400/CP343-1/CP443-1 as confirmed mailinglist post (Bugtraq). The advisory is shared at seclists.org. This vulnerability is uniquely identified as CVE-2016-8673 since 10/15/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/04/2022). The advisory points out:

The web management interface does not take advantage of any CSRF protection mechanism. This omission allows unauthorized POST requests to be issued by any JavaScript loaded in the user browser execution context, regardless of their origin. Given the fact that the affected products support POST requests, to upload Access Control List (ACL) configuration or customer specific actions, the lack of CSRF protection exposes the risk of unauthenticated management actions.

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

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 94460†). Entry connected to this vulnerability is available at VDB-93740.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 8.8
VulDB Meta Temp Score: 8.8

VulDB Base Score: 8.8
VulDB Temp Score: 8.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 8.8
NVD Vector: 🔍

CVSSv2info

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

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Exploitinginfo

Class: Cross-site request forgery
CWE: CWE-352 / CWE-862 / CWE-863
CAPEC: 🔍
ATT&CK: 🔍

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

10/15/2016 🔍
11/21/2016 +37 days 🔍
11/21/2016 +0 days 🔍
11/21/2016 +0 days 🔍
11/21/2016 +0 days 🔍
11/23/2016 +2 days 🔍
10/04/2022 +2141 days 🔍

Sourcesinfo

Vendor: siemens.com

Advisory: Web vulnerabilities in Siemens S7-300/S7-400/CP343-1/CP443-1
Researcher: Andrea Barisani
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8673 (🔍)
SecurityFocus: 94460 - Multiple Siemens Products Cross Site Request Forgery and Information Disclosure Vulnerabilities

See also: 🔍

Entryinfo

Created: 11/21/2016 09:01 PM
Updated: 10/04/2022 10:23 AM
Changes: 11/21/2016 09:01 PM (53), 06/05/2019 09:14 PM (13), 10/04/2022 10:23 AM (2)
Complete: 🔍
Cache ID: 18:796:40

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