VDB-101497 · CVE-2017-6025 · BID 97174

3S-Smart CODESYS Web Server up to 2.3 XML memory corruption

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 marked as critical has been reported in 3S-Smart CODESYS Web Server up to 2.3. Affected by this vulnerability is an unknown functionality of the component XML Handler. This manipulation causes memory corruption. This vulnerability is tracked as CVE-2017-6025. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in 3S-Smart CODESYS Web Server up to 2.3 (Web Server) and classified as critical. Affected by this vulnerability is an unknown code of the component XML Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A Stack Buffer Overflow issue was discovered in 3S-Smart Software Solutions GmbH CODESYS Web Server. The following versions of CODESYS Web Server, part of the CODESYS WebVisu web browser visualization software, are affected: CODESYS Web Server Versions 2.3 and prior. A malicious user could overflow the stack buffer by providing overly long strings to functions that handle the XML. Because the function does not verify string size before copying to memory, the attacker may then be able to crash the application or run arbitrary code.

The bug was discovered 03/28/2017. The weakness was disclosed 05/19/2017 (Website). The advisory is shared at securityfocus.com. This vulnerability is known as CVE-2017-6025 since 02/16/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 51 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 vulnerability is also documented in the vulnerability database at SecurityFocus (BID 97174†). The entry VDB-101498 is pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Web Server

Vendor

3S-Smart

Name

CODESYS Web Server

Version

License

commercial

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
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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: Memory corruption
CWE: CWE-119
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

02/16/2017 🔍
03/28/2017 +40 days 🔍
03/28/2017 +0 days 🔍
05/18/2017 +51 days 🔍
05/19/2017 +1 days 🔍
05/19/2017 +0 days 🔍
12/25/2020 +1316 days 🔍

Sourcesinfo

Advisory: securityfocus.com⛔
Researcher: David Atch
Status: Not defined

CVE: CVE-2017-6025 (🔍)
GCVE (CVE): GCVE-0-2017-6025
GCVE (VulDB): GCVE-100-101497
SecurityFocus: 97174 - CODESYS Web Server Stack Based Buffer Overflow and File Upload Vulnerabilities

See also: 🔍

Entryinfo

Created: 05/19/2017 14:07
Updated: 12/25/2020 08:24
Changes: 05/19/2017 14:07 (60), 07/29/2020 14:54 (3), 12/25/2020 08:24 (2)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.