OpenPLC v2/v3 modbus.cpp mapUnusedIO memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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8.5$0-$5k0.00

Summaryinfo

A vulnerability was found in OpenPLC v2/v3. It has been classified as critical. Affected by this issue is the function mapUnusedIO of the file modbus.cpp. This manipulation causes memory corruption. This vulnerability is registered as CVE-2018-20818. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability has been found in OpenPLC v2/v3 and classified as critical. Affected by this vulnerability is the function mapUnusedIO of the file modbus.cpp. 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 buffer overflow vulnerability was discovered in the OpenPLC controller, in the OpenPLC_v2 and OpenPLC_v3 versions. It occurs in the modbus.cpp mapUnusedIO() function, which can cause a runtime crash of the PLC or possibly have unspecified other impact.

The weakness was published 04/22/2019. This vulnerability is known as CVE-2018-20818 since 04/21/2019. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details of the vulnerability are known, but there is no available exploit.

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

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

Productinfo

Name

Version

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: 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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

04/21/2019 🔍
04/22/2019 +1 days 🔍
04/23/2019 +1 days 🔍
09/06/2023 +1597 days 🔍

Sourcesinfo

Advisory: arxiv.org
Status: Not defined

CVE: CVE-2018-20818 (🔍)
GCVE (CVE): GCVE-0-2018-20818
GCVE (VulDB): GCVE-100-133915

Entryinfo

Created: 04/23/2019 08:35
Updated: 09/06/2023 09:48
Changes: 04/23/2019 08:35 (35), 06/01/2020 09:17 (17), 09/06/2023 09:48 (3)
Complete: 🔍
Cache ID: 216::103

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